A revision of the adult tapeworms of hares and rabbits / by Ch. Wardell Stiles.
- Charles Wardell Stiles
- Date:
- [1896]
Licence: Public Domain Mark
Credit: A revision of the adult tapeworms of hares and rabbits / by Ch. Wardell Stiles. Source: Wellcome Collection.
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![longitudinal canals; the cirrus pouch is deserving of special notice. In the majority of the known Taeniidae the cirrus pouch is pyriform and rarely extends median of the ventral canal, hut in C. pectinata it is a long narrow structure reminding one of the nozzle of a hose; Riehm gives its average length as more than 1 mm., and on Plate VI, tig. 4, shows that it is more than twice as long as the distance between the genital pore and the longitudinal canal. This extreme length of the pouch is a character of great importance. Female organs: The vagina, according to Riehm, is about as large as the cirrus pouch. At a point corresponding to the proximal end of the cirrus pouch it becomes suddenly very thin, and leads to a second swelling, the receptaculum seminis. The female glands correspond in all essential characters to those of the genus Moniezia, except that the ovary is described as composed of ■fcwo quite distinct halves. Their position, some distance from the longitudinal canals, is striking. The uterus is said to be similar to that of C. ctcnoides, namely “a common uterus for both sides, which extends the entire breadth of the segmen, and is constricted only in the middle, so that in the gravid segments the lateral portion appears swollen by the ova in comparison with the rather thin median portion. Its volume is also considerably increased laterally [namely, laterally to the uterus, longitudinal in reference to the worm] by apparently unbranched tubes which extend anteriorly and posteriori}7'. As a matter of fact, however, these tubes resolve themselves as the optical sections of a corresponding number of circular widenings of the uterus.” Excretory system: The dorsal canals become obliterated some distance from the head. The transverse canals are connected with one another, not only by the ventral canals, but also by numerous smaller longitudinal canals. Topographically, Riehm figures the genital canals as dorsal of the nerve and longi- tudinal (ventral) canal. Tho parasite is said to occur only in the fall and first half of the winter, and only in hares. It was especially common around the Roblinger See, but rare on the higher plateaux of Saxony. Blanchard1 in 1891 states that he found this species in several hares of unknown origin. He has never found it in hares in the central part of France or around Paris, but found four specimens at Briancon in Lepus variabilis, killed at a height of 1,500 meters. His description, based upon these specimens, may be summarized as follows: The largest specimen was 18 cm. long; maximum breadth, 7 to 10 mm.; head 315 to 340 /i broad; neck, 285 to 325 jj, broad; in contracted specimens the neck may measure 1 mm. broad at the first segment; suckers elliptical, 142 ju long by 135 ji broad; opening, 80 fi long by 53 p broad; mature segments, 7 to 10 mm. broad by 1.1 to 2 mm. long; penis smooth, 40 to 45 ju in diameter, extrudes 175 to 200 u from pore; eggs generally polygonal from reciprocal pressure, but become elliptical or subspherical when pressure is removed; 80 to 90 /< by about 75 ju ; outer membrane 1 to 2 u thick; diameter of bulb of pyriform body 25 to 30 p ; length 40 to 50 p ; horns terminate in a long filament; hooks of oncosphere 8 /*. Bailliet2 in 1893 f>laces this species in his genus Ctenotccnia. Through the kindness of Dr. Brandes, I have obtained one of Riehin’s original specimens of Dipylidium pectination for comparison with the American forms, and Blanchard has placed his forms from L. variabilis at my disposal. In my private collection I find several specimens of tapeworms from Lepus timidus which I collected in Leipzig in 1890, and which agree perfectly with Riehnrs form. With this material at hand, together with one specimen from von Linstow and several from Moniez. 1 Mem. Soc. zool. France, IV, pp. 445, 452, 457-460, figs. 26-30. 2Traite Zool. rned. efc agric., I, pp. 278-279.](https://iiif.wellcomecollection.org/image/b28058124_0045.jp2/full/800%2C/0/default.jpg)
