332 LEWIS [[HXKY (iOUGH. 



in size and forms a receptaculuni seminis. The median end 

 of the receptaculuni seminis forms two brandies, one of which, 

 the oviduct, g'oes to the ovarium, the other, the uterine duct, 

 goes to the uterus. (Do these two ducts arise directly from 

 the receptaculuni or from a canalis seminalis as in the other 

 members of the group ?) The uteri of both sides ai-e probably 

 connected as in St. hepatica, Wolff hiigel, by an interuterine 

 duct. The cirrus pouch is pyriforra, 56 /li long by 40 jli broad, 

 the cirrus 50 to 00 |t long. Cirrus and vagina open into a 

 large and wide cloaca, which is directed diagonally lateral 

 and forwards, opening near the anterior angle of the segment. 

 Stiles observed the vas deferens to run from the cirrus-pouch 

 anteriorly of the testicles of the pore side, dorsally of the 

 ventral canal andfetnale organs, ventrally of the dorsal canal, 

 then through the median field, lying anterior and dorsal to 

 the transverse canal; it is further stated to cross the dorsal 

 canal (of the opposite side) ventrally, the ventral canal 

 dorsally, and to be finally lost in the testicles. Should this last 

 be correct, it w(uild be a totally different course to that of 

 the vas deferens in Stilesia hepatica, AVol ff hiigel ; fresh 

 material will have to decide this point. 



The ovary contains but few eggs; there is no vitelline 

 gland, and no shell-Q-land. The eo-ys enter the uterus ferti- 

 Used; in the uterus they are surrounded by nutritive cells, 

 as in St. hepatica, Wolffhiigel. The eggs are finally 

 enclosed in a paruterine organ. They have two envelopes, 

 an outer wrinkled fusiform and an oval inner one; the inner 

 one is devoid of spines (fig. 11). The spines in Stiles's 

 figure are probably the shrivelled outer envelope. The eggs 

 liieasure 56 fxx27 fi over the outer, 27 /< x 22 jli over the inner 

 envelope, 14 ^u across the embryo. 



The uteii of both sides, and later on the paruterine 

 organs, are in contact with a band of fibrous tissue, which 

 " extends partially around the uterus, crosses the dorsal canal 

 ventrally, and tapers off into a fine point, which runs through 

 the median field to meet," and is continuous with, the corre- 

 si)onding organ of the other side (Stiles, 1893, p. 78). 



