F. J. Meggitt 
203 
coiled and strengthened by annular thickenings similar to those in the pro- 
toxylem of Dicotyledons. When the cirrus lies inside the sac, these thicken¬ 
ings are on the exterior of its walls and project into the cavity of the sac. 
The space between the coils of the vas deferens is filled with deeply staining 
cellular tissue. The testes are over 100 and fill the whole proglottis except 
for the female organs and the short strip occupied by the genital ducts; this 
latter in stained specimens stands out as a prominent clear space stretching 
completely across the proglottis. 
The eggs in mature segments lie in egg-sacs extending laterally past the 
excretory vessels. Each sac contains 8-14 eggs. In all other respects the 
form seen agreed with Hall’s description (1920, 63). 
List of Species from Zanzibar. 
Anoplocephala perfoliata (Goeze 1782). Horse. 
Dipylidium chyzeri von Ratz 1897. Domestic cat. 
Dipylidium oerley von Ratz 1900. Domestic cat. 
Inermicapsifer zanzibarensis n.sp. Pouched rat (Cricetomys gambianum 
Eth). 
Stilesia globipunctata (Rivolta 1874). Domestic goat. 
Stilesia hepatica Wolffhiigel 1903. Sheep. 
Stilesia vittata (Railliet 1896). Camel ( Camelus dromedarius L.). 
Taenia hydatigena (Pallas 1766). Dog. 
Taenia taeniaeformis (Batsch 1786). Cat. 
REFERENCES. 
Baylis, H. A. (1915). A newCestode of the genus Zschokkeella. Ann. Mag. Nat. Hist. ser. 8, 
xvi. 40-50. 
- (1920). Notes on some parasitic worms from East Africa. Ibid. ser. 9, VT. 283-295. 
Beddard, F. E. (1911). On some mammalian Cestoidea. Proc. Zool. Soc. 626-600. 
- (1911 a). On two new genera of Cestodes from mammals. Ibid. 994-1018. 
- (1912). On a species of Inermicajpsifer from the Hyrax, and on the genera Zschok- 
keella, Thysanotaenia and Hyracotaenia. Ibid. 576-607. 
Bischoff, C. R. (1913). Cestoden aus Hyrax. Rev. suisse Zool. xxi. 225-284. 
Fuhrmann, O. (1901). Bemerkungen uber einige neuere Vogelcestoden. Centrbl. Rakt. 
Abt. 1, Orig. xxix. 757-763. 
- (1902). Die Anoplocephaliden der Vogel. Ibid. xxxn. 122-147. 
- (1908). Die Cestoden der Vogel. Zool. Jahrb. Suppl. x. 
Hall, M. C. (1920). The adult taenioid cestodes of dogs and cats and of related carnivores 
in North America. Proc. U.8. Nat. Mus. lv. 1-94. 
Janicki, C. v. (1902). Ueber zwei neue Arten des Genus Davainea aus Celebensischen 
Saugern. Arch. Parasitol. vi. 257-292. 
- (1910). Die Cestoden aus Procavia. Jen. Denkschr. xvi. 373-396. 
Linstow, O. v. (1906). Helminthen aus Ceylon und aus arktischen Breiten. Zeitschr. f. 
wiss. Zool. lxxxii. 182-193. 
Ragenstecher, H. A. (1878). Zur Naturgeschichte der Cestoden. Ibid. xxx. 171-193. 
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