A revision of the adult cestodes of cattle, sheep and allied animals ... / by C.W. Stiles ... and Albert Hassall.

  • Charles Wardell Stiles
Date:
1893
Catalogue details

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.

    29/174
    SPECIFIC DIAGNOSIS. From our present knowledge of this parasite we may accept the lol- lowing as a provisional diagnosis: Moniezia Benedeni (Moniez, 1879) R. Bl., 1891.—Strobila attains a length of 41, head lmm or more large; obtuse, 4-lobed, suckers directed diagonally loiwaids, opening circular. Neck present, slightly narrower than the head, about 2-2.5'1 long. Segments always broader than long; contracted ripe segments attain the measurement of 12“>m broad by 3'“‘ long by 2mm thick. Topography of longitudinal canals, genital canals, and female glands the same as in M. planissima; testicles? Interproglottidal glands extremely indistinct [absent?], without sacs. Ova 80-85 p in diameter; embryo 15 p\ pyriform apparatus 18 p. Type specimens are in the possession of Prof. Moniez, Lille, France, and 0. W. Stiles, Washington, D. 0. One very typical specimen is in the K. K. Museum in Vienna, Austria. (3) Moniezia Neumanni Moniez, 1831. [Plato IV, Figs. 1-5.] Host.—Sheep (Moniez). Geographical distribution.—France (Lille, by Moniez). LITERATURE. (1) Moniez, R. Notes sur les Helminthes, vi, 2; Revue Biologique clu Nord do la France, 1891, t. iv, 1 page. HISTORICAL REVIEW. Moniez gave a very short description of this worm (1), by which it has not been possible to recognize the species. He was, however, so kind as to send specimens. He states (1) that the head has the same dimensions as that of M. Benedeni, and is more than lram in diameter; suckers agree with those of M. Benedeni; while the neck is the same length as in If. Benedeni but filiform. The strobila is much shorter (1-2 feet); segments narrower (8nim), thinner, and 1-1.5mmlong; the segments which are about to become detached are 6 by 2mm. Ova measure 55-5G p, embryo 18-21 p.. ANATOMY. Only contracted segments (Plate iv, Fig. 1) are at hand, and but little in regard to the anatomy of this species can be given. Seolex.—The head resembles that of M. Benedeni in some respects; it is almost square when viewed enface (Tlate iv, Fig. 2a), 0.9,,,,n broad; when viewed from the dorsal or ventral surface, the suckers do not appear so distinctly separated from the neck. The openings of the suckers are quite small, situated at the four corners and directed diagonally for- ward. The segments are all broader than long. In several segments measuring 1.2mm wide by 0.56,mn long (Plate iv,