225] PROTEOCEPHALIDAE—LA RUE 225 



ductus ejaculatorius takes a siuuous course through the cirrus-pouch 

 but it forms no coils. The cirrus-pouch lies perpendicular to the longi- 

 tudinal axis of the proglottid and reaches almost to the median line of 

 the same. 



Female organs are as in other members of the genus. The vagina 

 opens either anterior or posterior to the cirrus-sheath. The ovary is 

 voluminous, bilobed, joined at the middle by a mid-piece. The ovarian 

 lobes are somewhat plumper in form than are those of 0. marenzelleri. 

 The uterus forms about 20 long diverticula on either side. In Schwarz's 

 drawing (reproduced Fig. 191) the genital pore is marginal and at the 

 end of the first third of the proglottid. The eggs are round and have 

 three membranes. No hooklets are to be found on the outer membrane. 

 Schwarz does not state whether the diameter of 0.024 mm. is the diame- 

 ter of the entire egg or of the embryo. 



Ophiotaenia racemosa is a much smaller species than Crepidoboth- 

 rium gerrardii. Its head and suckers are smaller, the proglottids shorter 

 and narrower. The form of the suckers is greatly different in the two 

 species. 0. racemosa differs from 0. calmettei in its smaller head, 

 smaller suckers, in the distribution of testes and in the number of uterine 

 pouches. 0. racemosa is likewise much smaller than 0. marenzelleri and 

 0. grandis in length, breadth, size of head, and size of suckers. It also 

 has fewer testes. 0. racemosa differs from 0. timer esuri in being 

 somewhat smaller. Its chief differences lie in the position of the testes 

 and in the character of the cirrus and vagina. 0. racemosa differs from 

 0. pigmentata in having larger suckers. 0. pigmentata is too poorly 

 described to furnish more diagnostic differences. 0. racemosa differs 

 from 0. nattereri and 0. perspicua in having a larger head, larger suck- 

 ers, a different arrangement of testes, and smaller proglottids. 



