A revision of the adult cestodes of cattle, sheep and allied animals ... / by C.W. Stiles ... and Albert Hassall.
- Charles Wardell Stiles
- Date:
- 1893
Licence: Public Domain Mark
Credit: A revision of the adult cestodes of cattle, sheep and allied animals ... / by C.W. Stiles ... and Albert Hassall. Source: Wellcome Collection.
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![begin to develop varies greatly in different specimens. In some cases the interproglottidal sacs appear before the genital organs, in other cases not until after. In several specimens of this species the sacs were very few or even entirely absent (young specimens), while in one specimen they were fused into a regular line very similar to the inter- proglottidal line of M. planissima. This is undoubtedly to be looked upon as a reversion. In the end segment of one specimen was found a single median but normally developed set of female genital organs with a single lateral pore. This probably represents a reversion to a former type with single pores. The mature ova measure 52 //—00 jj in diameter; the bulb of the pyriform apparatus is 20 yu-24 //; the horns (12 pt-15 ju long) end in a knob; the hooks of the embryo measure 9 /< long. In this species it was plainly seen that the pyriform body was surrounded by a mem- brane, a detail which was not so clear in M. planissima. SPECIFIC DIAGNOSIS. The specific diagnosis of this form is as follows: M. trigovophora sp. n., 1893.—Strobila attains 1.6-211' in length, cream to whitish in color. Head 0.624mm-0.704mm broad; suckers not distinctly raised, 0.256 by 0.2mm, slit form. Neck filiform, 2mni long. Segments generally broader than long, although end segments are occasionally seen which are square or even slightly longer than broad; rarely over 6inm broad by 2mni long. Topography of longitudinal canals, genital canals, and female organs the same as in M. planissima and M. expansa; testicles usually arranged in two triangles; generally absent from the median line of segment. Genital pore never behind the middle of the segment. Ova 52-60//; bulb of pyri- form apparatus 20-24 p) horns 12-15 ju. Type in the Bureau of Animal Industry, U. S. Department of Agri- culture. Typical specimens will be sent to museums and specialists exchanging with this Bureau. s. & h. G. Denticulata Group. (M. denticulata, and M. alba.) Interproglottidal glands absent. (7) Moniezia denticulata (R., 1810) R. 111., 1891. [Plate V, Figs. 4-7.] Synonymy.—Taenia denticulata Rudolphi, 1810; T. denticolata (R.) Perr., 1882; Mon- iezia denticulata (R) R. HI., 1891; (Alysehninthns denticulatus, Blainville, after Baird, 1853). Host.—Cattle (Rudolphi). Geographical distribution.— ? (Alfort Museum, Rnd.’s specimens.) LITERATURE. (1) Rudolphi. Hist. nat. ii, 2, pp. 79-81. (2) Ent. Syn., p. 145. (3) Guklt. Lehrbuch der pathologischen Anatomic der Haussliugethlere, 1831, i, p. 381, taf. x, figs. 3-4.](https://iiif.wellcomecollection.org/image/b28122604_0046.jp2/full/800%2C/0/default.jpg)
