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. The foregoing facts, I believe, furnish a very good demonstration of the untenability of Cohn’s division of the hymsnolepis.

Between the first and second turns of cariocx vas deferens, dorsal to the cirrus pouch, there is an enlargement, the vesicula seminalis figs. In fact, in many cases it can not be considered of more than specific value. I am able to confirm Grassi’s observations, in part, as I have sections of H. A six-hooked embryo 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 second follow- ing segment has a well-defined layer of cells upon the outer surface of the uterus, and hy,enolepis layer fig. Except for the lack of agreement in the number of testes, Taenia spiculigera?

The median and accessory lateral nerves are con- nected behind the complex by numerous commissures with one an- other and with the main lateral nerves.

The loops lie in nearly the same transverse plane. Later he found five much smaller specimens of which he gave incomplete descriptions. The posterior margins are not prolonged back- ward to any extent, so that there is little or no overlapping of the segments.


Dorsal view of mature segment No. Zur Systematik der Vogeltaenien. Brief synopsis in Brann hymenklepis The three outer layers are thin and colorless, while the innermost next the embryo is often slightly tinged with yellow and is usually thicker than the others.

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

The Nervous System in the Cestode Moniezia expansa. Some of them are apparently continuations of the other fibers br just men- tioned. Die im zoologischen Museum der Universitat Halle aufgestellten Ein- geweidewiirmer nebst Beobachtungen iiber dieselben. Diesing hymenoepis, 64 merely adds to the list of hosts. It is this outer ring which forms the posterior hymenolfpis in T. The bundles of this layer are of about the same size throughout the strobila, and hence in the posterior segments fig.

At a point about one-third the length of the pouch from its distal end, the vas deferens becomes narrow again, to form the cirrus fig.

Hymenolepis carioca

In these segments the anterior end of the uterus is more or less ex- posed. In Main lateral nerve. The two halves of the commissure are connected by fibers running diag- onally from one to the other, and between them lie numerous ganglion cells.

I was unable to demonstrate, however, that these cells opened into the cavity of the vas deferens in H. The clear, hymenoelpis shell has a thickness somewhat over half a micron. In two specimens examined the dorsal limb of the right-hand loop came from the ventral vessel, of the left-hand loop cariova the dorsal vessel fig. The ventral excretory vessels are larger than the dorsal vessels from the beginning fig. The head measured 0. In the scolex the canals of both sides turn inward and approach each other as they pass hymenolepi.


At its maximum it extends from one excretory canal to the other. Surrounding the middle part of the cirrus pouch is a layer of cells figs. Untersuchungen iiber das centrale Nervensystem der Cestoden. The origin of these muscles is similar to that of the outer longitudinal muscles of Anoplo- cephala perfoliata as described by Liihe 94, 96i. From segment to the ovary in- creases in xarioca very rapidly. RANSOM The dorsal canal continues toward the ventral surface, passes around the posterior face of the ventral sucker, and after completing the circuit curves outward and forward to pass anteriad between uymenolepis dorsal and ventral sucker fig.

Frontal section through a mature segment No.

Hymenolepis carioca | definition of Hymenolepis carioca by Medical dictionary

The vasa efferentia are wide, short tubes uniting to form the vas deferens fig. There are no diagonal fibers. Upon a priori grounds alone such a division seems exceedingly artificial, and indeed Wolffhiigel 00, 00a has demonstrated by two or three cases that it is false and misleading by reason of the non-correspondence of the superficial characters taken by Cohn to more important internal relations.

From the point at which each lateral nerve joins the cerebral commissure, two nerves fig. These two aggregations of humenolepis seem to serve the functions of retractors of the cirrus pouch and cirrus, respectively.