488 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 89 



each side to the level of the posterior end of the pharynx where each 

 turns medially, narrowing to a tube with slightly muscular wall ; these 

 enter the proximal end of the seminal vesicle. Seminal vesicle is an 

 elongated tube with dilated proximal end, which receives the vasa 

 deferentia ; usually this end is anterior and the vesicle narrows pos- 

 teriorly to its entrance into the penis; but in one whole mount, the 

 seminal vesicle has the reverse orientation. Vesicle has muscular wall 

 of inner circular and outer longitudinal fibers. Free prostatic vesicle 

 lies close to and parallels seminal vesicle (fig. 31, c) ; is of elongated 

 oval form with muscular wall very thick at free end, thinning towards 

 duct (fig. 31, c). Duct of prostate and seminal vesicle join in penis 

 base. Penis as in Eurylepta, elongated with terminal stylet and 

 penis sheath; male antrum a large rounded chamber (fig. 31, c). 

 Where vasa deferentia are confluent in median posterior region 

 there is, according to Pearse and Pearse and Littler, a small blind 

 diverticulum. I was able to see this on one whole mount, the type 

 specimen of Oligoclado floridaniis^ but not on any of the others, and I 

 was not convinced that it might not be the basal part of a branch col- 

 lecting from posterior testes. Female pore shortly behind male pore ; 

 opens into somewhat expanded female antrum from roof of which 

 narrow canal expands slightly into small cement pouch (fig. 31, <?). 

 This receives the cement glands, which form a dense eosinophilous 

 halo around the female duct. From cement pouch, short vagina pro- 

 ceeds posteriorly and soon receives on either side a uterus (see Pearse 

 and Littler, 1938, pi. 21, fig. 11). Each uterus is a thin -walled tube 

 stuflfed with eggs ; it proceeds posteriorly alongside the main gut and 

 terminates blindly near the gut end. According to Pearse and Littler 

 the anterior part of each uterus is bifurcated, but this is probably a 

 trivial variation. It is not shown or mentioned by Pearse in his 

 original description of O. fjoridamus^ and I was not able to discern any 

 such condition on the type specimens of O. foridanus and "5'. pry- 

 therchV From the anterior end of each uterus there extends laterally 

 a duct, which opens into a uterine duct, and this in turn connects by a 

 duct with the large saclike uterine gland of that side. There is a 

 pair of uterine glands as in Eurylepta. The uterine duct of each side 

 receives a branch from in front and then proceeds posteriorly along 

 the uterus to join its fellow of the opposite side just behind the blind 

 posterior end of the main gut. The common duct so formed turns 

 ventrally and opens in the midventral line by a uterine pore. These 

 relations are figured by Pearse and Littler. The uterine glands have 

 a very tall epithelium underlain by a few muscle strands and seem to 

 serve for holding and digesting excess sex cells. The uterine ducts are 

 lined by a cuboid al epithelium and have a muscle coat chiefly of cir- 

 cular fibers. 



