421] ANOPLOCEPHALIDJE—DOUTHITT 71 



Erethizon dorsatus and E. epixanthus, N. America. (See 

 present paper. ) S. americana 



33. Testes relatively few, confined to the anterior portion of the 



proglottid, mostly on the pore side. Ovary small, pear- 

 shaped. Host, Rhinoceros sondiacns (and other rhinocero- 

 ses?) (See MacCallum & MacCallum, 1912; Taenia gigan- 



tea.) 8. gigantea 



Testes very numerous, filling almost the entire field dorsally. 

 Ovary consists of a transverse portion which extends nearly 

 across the median field, and of numerous clubshaped lobes 

 leading from it. Host, Rhinoceros indicus (and other rhi- 

 noceroses?) (See Deiner, 1912.) For reasons for trans- 

 ferring to Schizotaenia, see present paper 8. latissima 



Genus Cittotaenia (Syn. : Ctenotaenia) 



34. Cirrus pouch pyriform, distinct. Dorsal excretory duct lateral 



or dorsal of ventral (no statement for C. bursaria) 35 



Cirrus pouch much elongated and slender, resembling the noz- 

 zle of a hose, and less distinct; in old proglottids, some- 

 times becoming pyriform on account of being gorged with 

 sperm. Dorsal excretory duct generally median 39 



35. Uterus not a simple transverse tube, but a rather simple reticu- 



lum. Length, 40 to 80 cm. Breadth, 15 mm. Number of 

 proglottids, 200 or more. Genital pores in posterior corner 

 of segment. Testes very numerous, scattered thru the dor- 

 sal portion of the median field. Host, Lepus cuniculus, 



Europe. (See Stiles, 1896, and others.) C. denticulata 



Uterus a simple transverse tube 36 



36. Testes 100 to 150, confined to the region between the two ova- 



ries, not separated into two lateral groups. Host, Arcto- 

 mys sp., France. (See Blanchard, 1891; and Stiles, 1896.) 



C. marmotae 



Testes extending nearly or quite to the excretory ducts on 

 either side anterior to the ovaries, and not separated into 

 two lateral groups 3T 



Testes arranged in a group about each ovary, absent from the 

 median part of the field 38 



37. Length, 55 mm. Each set of genital organs occupies one-fifth 



the cross diameter of the proglottid. Cirrus pouch short 

 and clubshaped. Testes numerous, spherical, 44yu. in diame- 

 ter, reaching the posterior end of the proglottid in the 



