328 LEWIS HENRY GOUGH. 



but one pore, the pores being irregularly alternate. There is 

 also only a single ovary to each segment^ not two ; and finally 

 the arrangement of the testicles and vas deferens is quite 

 different from what Wolffhiigel described. 



There are ten to twelve testicles on each side of the segment 

 (fig. 13 and Text-fig. 1) ; they lie dorsally between the ventral 

 and the dorsal canals, and dorsal to the ventral canal. Seen 

 from the dorsal side of a total mount, the testicles lie in two 

 or three rows of about four or five (sometimes six) in a row. 

 On transverse sections (Text-fig. 1), one only sees a single row. 

 The diameter of a testicle is about 50 to 55 fx. The vasa 

 efferentia arise on the dorsal side of the testicles, as do the 

 vasa deferentia. The vas deferens of the testicles on the 

 right side of the proglottid runs from right to left, the vas 

 deferens collecting from the left group of testicles fi'om left 

 to right; at the middle of the proglottid the left and right 

 bx'anclies meet and join to form a common vas deferens which 

 bends ventrally, and, having passed into the depth of the 

 proglottid past the testicles, turns towards the pore side of the 

 segment. It passes the dorsal canal ventrally, the ventral 

 canal and nerve dorsally. Before reaching the cirrus pouch 

 it forms a number of twists, whose function is that of a vesi- 

 cula seminalis; these lie above the ventral canal. The cirrus 

 pouch (fig. 16) is oblong, measuring 83 ju by 50 //, the diameter 

 of the cirrus 16'5/i. Cirrus and vagina open into a wide and 

 deep genital cloaca, whose aperture is situated near the 

 middle of the segment. 



The female organs also differ considerably from Wolff- 

 hiigel's statements (fig. 13). There is but one ovarium, lying 

 on the pore side, between the ventral and dorsal canals, 

 nearer to the ventral than to the dorsal canal. The uterus 

 is double, one uterus lying close to the ovarium, the other on 

 the other side of the proglottid in the cori-esponding position. 

 The two uteri are connected by a duct, the inter-utt-rine duct, 

 which, however, may be morphologically but the median 

 portion of the uterus. This duct crosses the ventral field 

 ventral to the dorsal canal. The ovarium contains very few, at 



