Cestode of the (^ewMS Zscliokkeella. 49 



pores. Sperm-duct not greatly coiJed. Cirrus-sac small. 

 JYo vesicula seminalis. A small rounded receptaculum seminis 

 present, in addition to a fusiform expansion of the inner half 

 of the vagina. Uterus a branched tube at first, becoming a 

 transverse sac ; not persistent. Many egg-capsules developed 

 in gravid segments, each containing about 20 eggs. 



Hab. Intestines of a rat (probably Epimys rattus), Accra, 

 Gold C'oast, W. Africa. 



Type-specimens in the British Museum (Natural History). 



Literature Consulted. 



Beddard, F. E. 1911 a. " On some Mammalian Cestoidea." P. Z. S. 



pp. 626-660. 

 . 19116. "On Two new Genera of Cestodes from Mammals." 



P. Z. S. pp. 994-1018. 

 . 1912. " On a Species of Inermicapsifer from the Hyrax, &c." 



P. Z. S. pp. 576-607. 

 . 1914. " On a new Species of Rhabdometra, and on the Par- 

 uterine Organ in Otiditcenia." P. Z. S. pp. 859-887. 

 BiscuoFF, C. P. 1912. " Cestoden aus Hyrax, ' (Preliminary Account.) 



Zool. Anz. xxxix. p. 751. 

 . 1913. " Cestoden aus Hyrax." Rev. Suisse Zool. xxi. no. 8, 



pp. 225-284, pis. vii.-ix. 

 FuHRMANN, O. 1896. " Ueber das Subgenus Davainea," Rev. Suisse 



Zool. iv. no. 1, pp. 111-133, pi. iv. 

 . 1902. " Die Auoplocephaliden der Vcigel." Centrbl. f. Bakt. u. 



Paras, xxxii. pp. 122-147. [" Zschukkia" (Zschokkeella) linstowi, 



p. 138.] 

 Janicki, C. vox. 1901. " L eber zwei neue Ai-ten des Genus Davainea^ 



Arch. Parasitol. vi. p. 257. 

 . 1910. " Die Cestoden aus Procavia." Denkschr. med. Ges. Jena, 



xvi. pp. 373-396, pis. xii.-xiv. 

 Ransom, B. H. 1909. " The Tfenioid Cestodes of North-American 



Birds." U.S. Nat. Mus. Bull. 69. 

 Shipley, A, E. 1908. " Rats and their Animal Parasites." J. Econ. 



Biol. iii. no. 3, p. 61. 



EXPLANATION OF PLATE VI. 



Zschokkeella muricola. 

 Fiff. 1. The scolex, higlily magnitied. 



Fiff. 2. Three young sexually mature segments, to show the general 

 arrangement of the organs. (From a stained preparation.) 



C.>S'., cirrus-sac; D.V., dor.sal excretory vessel ; Of., ovary; 

 S., shell-gland ; T., testes ; Ut., uterus ; V., viteUine gland ; 

 Var/., vagina; V.D., vas deferens. 

 Fi(/. 3. Portion of the ventral network of excretory vesseb, in five con- 

 secutive segments. (Reconstructed from a series of horizontal 

 sections.) 



L., longitudinal vessel; T., transverse vessel. 

 Fiff. 4. Diagram of the arrangement of the female organs in a sexually 

 mature segment, as seen from above. 



Ou., ovary; Oud., oviduct; U.S., receptaculum seminis; 

 S., shell-gland; Ut., uterus ; V., vitelline gland ; Va(/., vagina. 



Ann. c& Mag. N. Hist. Ser. 8. Vol. xvi. 4 



