1 70 TAPE won MS OF HARES AND RABBITS STILES. VOL.XIX. 



Genus CITTOTCENIA, Riehm, 1881. 



1881, Cittotcenia, EIEHM, Zeitsclir. f. d. ges. Naturwiss., 3 ser., VI, p. 200. Type, 



Cittotcenia latissima Riehm, 1881 Tcenia denticulata Rudolphi, 1804. 

 1881, "Dipylidium, LEUCKART," 1863, p. p. of RIEHM, Zeitschr. f. d. ges. Naturwiss., 



3 ser., VI., p. 200 ; p. 565. Type, Tce.nia canina Liunreus, 1758. 

 1891, Moniezia p. p., R. BLANCHARD, Mdm. Soc. zool. France, IV, p. 187; p. 444. 



Type, Tamia expansa Rudolphi, 1810. 

 1893, Ctcnotamia, RAILLIET, Traitd Zool. m6d. et agric., I, p. 278. Type, Tamia 



marmotce, Frolich, 1802. 



Diagnosis. Cittotcenia, Eiehm, 1881 : Anoplocephalinre with segments 

 broader than long and longer than thick ; end segments in some cases 

 showing a tendency to become longer and narrower. Two full sets of 

 genital glands and two lateral genital pores to each segment; gener- 

 ally one, in some cases two, simple transverse tubular uteri in each 

 segment; uterus generally possesses simple proximal and distal diver- 

 ticula. The vagina is ventral of the cirrus pouch on both sides of the 

 segment. Dorsal canal varies somewhat in position, but shows a con- 

 stant tendency to lie between the ventral canal and nerve, especially 

 at the plane of the genital pores. Genital canals cross the longitudinal 

 canals and nerves dorsally. Interproglottidal glands absent. Calca- 

 reous bodies not yet recorded. Eggs with well-developed pyriform 

 body, the horns of which are long, generally filamentous, crossing each 

 other. 



Hosts. Eodents. 



Type. Gittotamia latissima, Eiehm, 1881, = Cittotcenia denticulata 

 (Eudolphi, 1804), Stiles & Hassall, 1896. 



Eiehm proposed the genus Cittotcenia in 1881, with C. latissima as 

 type and only species ; his description reads as follows : 



4. Cittotcenia latissima. Die Gattung ist errichtet mit Riicksicht auf die merkwiir- 

 dige Ausbildung des Excretionsorganes, welches nicht leiterartig, sondern mit je 

 3-5 vielfach omastomosirenden und in einander iibergehenden Hauptseitenstammen 

 und zahlreichen, das ganze Thier netz-formig durchsetzenden Nebeniisten, ranken- 

 artig die Tame dnrchzieht. C. latissima hat doppelte Geschleehtsorgane, welche 

 auf den zizzenartig vorspringenden Hinterecken der Glieder nach aussen miinden. 

 Der Kopf breiter als bei den vorigen erscheint vorn abgestutzt, hakenlos. Liinge der 

 Strobila bis 2 Fuss, Breite der letzten Proglothiden bis iiber f Zoll. Wohnthier: 

 Kaninchen. 



In the same paper Eiehm placed two other double- pored anoploce- 

 phaline cestodes in Leuckart's genus Dipylidium, i. e., D. pectinatum and 

 D. leuckarti, and later in the same year l he rejected his newly estab- 

 lished genus Cittotcenia, uniting it with Dipylidium. 



In 1891 Blanchard 2 united in the genus Moniezia the double-pored 

 anoploceph aline cestodes of rodents with those of ruminants. In 1893 



1 Studien an Cestoden. Zeitschr. f. d. ges. Naturwiss., 3 ser., VI, 1881, pp. 565, 580. 



2 Mem. Soc. zool. France, IV, 1891, p. 187. 



