415] AXOPLOCEPHALIDJE—DOUTHITT 65 



Vaginal pore posterior, or posterior and dorsal to cirrus pouch. 

 Uterus tubular. No prostate gland. Ventral excretory 

 ducts normal in size. Genital pores alternate, except in the 

 doubtful Bertiella pinguis where they are unilateral. Tes- 

 tes anterior. (See Bourquin, 1905.) ~JBertiella 12 



Vaginal pore and vagina ventral to cirrus pouch. Uterus tubu- 

 lar. No prostate gland. Genital pores dextral except in 

 the doubtful Anoplocephala omphalodes and A. minima. 

 testes only on the side away from the genital pore, except in 

 A. spatula and occasionally in A. omphalodes. (See present 

 paper. ) _ An oplocephala 21 



Vagina and vaginal pore anterior to the cirrus pouch. Uterus 

 diffuse, degenerate reticular. No prostate gland. Testes 

 either posterior or anterior, and usually mostly on the pore 

 side. (See present paper.) Schizotaenia 30 



6. Vagina crosses cirrus pouch ventrally on both sides of the seg- 



ment. (See Stiles, 1896, and present paper.) Cittotaenia 34 



Vagina crosses cirrus pouch dorsally on the left, and ventrally 

 on the right side. (See Stiles & Hassall, 1893.) Moniezia 44 



Genus Andrya 



7. Scolex large. Excretory ducts enormous. No prostate gland. 



With external vesicula seminalis „. 8 



Scolex and excretory ducts of ordinary dimensions. "With 

 prostate gland. Vesicula seminalis confined to cirrus 

 pouch __ 9 



8. Length 10 to 20 cm. Number of proglottids, 350 to 450. Width 



of strobila, 1.5 mm. Vesicula seminalis very large. Host, 

 Oeomys oursarius, Minnesota. (See present paper.) 



A. macrocephala 

 Length 9 to 12 cm. Number of proglottids, 290. Width of stro- 

 bila, % mm. Vesicula seminalis only two or three times 

 the diameter of the vas deferens. Host, Geomys oursarius, 

 Minnesota. (See present paper.) „ A. translucida 



9. European ; over 60 cm. long, and 5 to 10 mm. broad 10 



North American ; 3 to 5 cm. long, not over 2 mm. wide _ 11 



10. Prostate gland elongate. Testes comparatively few, mostly on 

 the side away from the pore. Host, Lepus timidus, Saxony. 



( See Stiles, 1896. ) A. rhopalocephala 



Prostate gland round. Testes scattered thru entire median 

 field. Hosts, Lepus cunicidus and L. timidus, Europe. 

 (See Stiles, 1896.) A. cuniculi 



