NO. 1105. 



PROCEEDINGS OF THE NATIONAL MUSEUV. 179 



Bailliet 1 iu 1893 places Riehm's species in his genus Ctetiotcmiin7~ 



From the work of former authors and from my own observations upon 

 the original material of T. dentieulata, T. (joezei, and Clttotcenia latis- 

 sima, I propose the following as a revised specific diagnosis: 



Diagnosis. Cittotcmia dentieulata (Kudolphi, 1804), Stiles and Has- 

 sall, 189(5: Strobila attains 40 to 50 cm., even 80 cm. in length by 15 mm. 

 in breadth by 3.5 mm. in thickness, is grayish to grayish red in color, 

 and is made up of 200 or more segments. Head unarmed, 0.8 mm! 

 broad by 0.63 mm. long, suckers large and prominent; rostellum not 

 observed, Neck ub> ent. Genital pores double, prominent, opposite in 

 posterior half of margin, near corner of the segment. Male organs: 

 Testicles 0.115 mm. in diameter, very numerous, scattered through the 

 dorsal portion of the median field; cirrus-pouch large and prominent, 

 1.12 mm. long by 0.32 mm. broad. Female organs: Vagina runs ven- 

 trally and distally of cirrus-pouch on both sides of segment; female 

 glands very similar to those of Gittotcenia pcctinata, situated close to 

 longitudinal canals ; uterus very complex. Eggs 52 to 63 //in diameter; 

 bulb of pyriform body 16 to 24 /--. Excretory system : Very complex, 

 numerous, thin-walled longitudinal canals (probably all belonging to 

 the ventral system); dorsal canals with thick wall. Genital canals 

 cross the longitudinal canals and nerves dorsally. 



Host. Common European wild rabbit (Lepus cuniculus). 



Types. Eudolphi's type in Berlin Museum; fragments in the collec- 

 tion of Stiles, Nos. 17, 1492, U.S. <S T .M. Baird's type in South Kensing- 

 ton Museum (London); fragments in collection of Blanchard. Riehm's 

 cotypes in collection of Leuckart; Vienna Museum; Xo. 1328, U.S.N.M. 

 Several typical specimens in collection of Moniez. 



Geographical distribution. Europe: France (Chabert, E. Blanchard, 

 Monie/); Saxony (Biehm). 



CITTOT^NIA CTENOIDES (Railliet, 1890), Stiles, 1896. 

 (Plate XIV, figs. 1-8.) 



1881, DipyMium leuckarti, RIKHM, Zeitschr. f. d. ges. Xaturw., 3 ser., VI, p. 200; pp. 



566-577, pis. v, figs. 3, 11-13, 16; vi, figs. 5-6. 

 1888, Tasnia leucJcarti (RiEiiM, 1881), NEUMANN, Traite des maladies parasitaires, 



etc., p. 426 [ncc Tccnia leuckarti, KRABBE, 1869, Bidrag, p. 335]. 



1890, T. ctenoides, RAILLIET, Rev. d. Sci. nat. appliq. Bull. Soc. nat. d'Acclimat. de 



France, p. 346. 



1891, Moniezia huckarti (RIEHM, 1881), R. I^LAXCHARD, Mdm. Soc. zool., France, 



IV, p. 187; pp. 444, 450-451. 

 1893, Ctenotwnia Jeuckarti (RiEHM, 1881), RAILLIET, Traitd de Zool. med. et agric., 



I, p. 278. 

 1896, Cittotocnia leuckarU (RIEHM, 1881), STILES & HASSALL, Veterinary Magazine, 



III, p. 407. 



For the history of this species prior to Riehm, 1881, see the historical 

 review of G. pectinata, p. 184. 



Traito Zool. med. et agric., I, p. 278. 



