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PRELIMINARY NOTE ON THE LIFE HISTORY OF HYMENOLEPIS CARIOCA. By Myrna F. Jones. See allHide authors and affiliations. Science 23 Nov Hymenolepis may refer to: Hymenolepis (plant) · Hymenolepis (tapeworm) · Disambiguation icon. Disambiguation page providing links to articles with similar . 1. Science. Nov 23;68() PRELIMINARY NOTE ON THE LIFE HISTORY OF HYMENOLEPIS CARIOCA. Jones MF. PMID:

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The lateral longitudinal nerves In arise from the postero-lateral corners of the ganglia figs. An inner poste- rior ring, if present, is scarcely developed. The central portions are continuous, while the peripheral portions are separated from one another by the constrictions. The longitudinal fibers come from the diagonal system, nymenolepis from the subcuticular longitudinal muscles, and attach to crioca tip of the cirrus pouch to form part of the system of protractors.

The former measure 15 p to 20 p. In Blanchard’s description the number of testes is given as very few, most often three, which allows a desirable de- gree of latitude to this character. Apart from the major complications arising during the growth of the uterus of H. Two figures by Creplin 29 are reproduced by Braun The presence of hooks upon the suckers might ap- pear as a confirmation of the supposition made by Magalhaes that the species is a Davainea, but beyond this characteristic it possesses none of the peculiarities of that genus.

[1st proof of Hymenolepis carioca in Lower Austria].

These two aggregations of fibers seem to serve the functions of retractors of the cirrus pouch and cirrus, respectively. Inner envelope Onchosphere Hymenoleis fig. This bulb is apparently homologous to the vaginal sphincter of Drepanidotaenia lanceolata described by Wolff hiigel 00a. In the regions where the zones approach one another they are connected by interlacing fibers.

Hymenolepis carioca | definition of Hymenolepis carioca by Medical dictionary

The Nervous System in the Cestode Moniezia expansa. Very rarely a pore will be found on the left-hand margin. In the segments imme- diately following, the anterior mass of cells has begun to arrange itself into a layer enclosing a central cavity; the uterine duct from the shell gland has grown longer, and become bent back and forth. The length of one of the small specimens was 4 mm. Whether such action takes place by natural muscular con- tractions is uncertain, but there is certainly cariocw tendency in this di- rection.


There is still hyemnolepis evidence in this regard. Conard I have had the privilege of seeing his manuscript, as well as his material and hymenolepiw, which have proved of great assist- ance in the identification of my specimens.

The broken lines are anterior to the plane of section. The inner quadrants of the nerve zones of the suckers correspond to the commissures in T.

In these segments the anterior end of the uterus is more or less ex- posed. Strobilation begins immediately behind the head, and is very distinct almost from the first, by reason of the deep constrictions between the segments.

They are very thin and close together, and run around the vagina in a circular direction, so that in a longitudinal section they appear as a thick coat of cilia. Two of the worms were young and immature. It is connected with the latter near the region of crossing by two or three small vessels, and continues ventrad as the outgoing limb of the ventral loop. The two pairs of nerves dd, w mentioned above form a dorso- ventral commissure composed of two parallel right and left halves.

Frontal section through a mature segment No. The dorsal canal fig. The head measured 0. A head, sectioned in situ with a piece of intestine, pos- sessed, upon the suckers, hooks fig.

Deux nouveaux Tenias de la Poule domestique. The outer surface of the projecting rims of the segments is marked by a number of longitudinal grooves fig. Some of them are apparently continuations of the other fibers br just men- tioned. Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than of the oldest leading academic journals.


The arrangement of the organs within the cirrus pouch is similar to that of Drepanidotaenia lanceolata Wolff hiigel 00a.

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The space between the middle two is filled with a granular mass, and potentially, as well as actually in some cases, these two membranes, by close approximation, constitute but a single envelope. A six-hooked embryo fig. Although the opening of the vagina fig.

Beitrag zur Kenntnis der Vogelhelminthen. The clear, transparent shell has a thickness somewhat over hymenopepis a micron. Dorsal view of very young segments. With regard to its reproductive organs as well as in other respects Hymenolepis carioca is quite comparable to H. Similar muscle bands have been described in Taenia depressa by Fuhrmann 95in Taenia iniiata by Jacobi 98in Fimbriaria fasciolaris and Dicranotaenia coronula by Wolffhiigel 00as well as in other forms by different authors.

The genital pores are situated upon the right-hand margin of the strobila, normally somewhat in front of the middle of each seg- ment fig. From the point of union of each of these eight nerves with the ring, a branch of nerve fibers passes outward over the surface of the adjacent sucker. The two halves of the commissure are connected by fibers running diag- onally from one to the other, and between them lie numerous cariocz cells.

From it nervous processes an pass anteriad along the sides of the rostellum, within which, also, there is a considerable amount of nervous tissue. Surrounding each sucker near its posterior pole is a circular ring or zone of nerve fibers, lying in the same horizontal plane as the transverse cerebral commissure, and joined to it at its point of union with the lateral nerve.

Transverse vessels connect the ventral vessels at irregular intervals of two to seven segments, usually at an interval of hymenolpis five.