NATURAL SCIENCES OF PHILADELPHIA. 41 



and narrow. The epididymis is very long, convoluted at the end 

 nearer the oviduct. The last-named organ is not much convoluted. 

 The prostate is scalloped along its edges. The genital bladder is 

 globular, small, with a long, small duct. The sac of the penis is 

 extremely long, ribbon-like, one and one-half as long as the ovi- 

 duct. The vas deferens enters its apex. 



The long ribbon-like sac of the penis resembles that figured by 

 Dr. Leidy (Terr. Moll. U. S. I.), of H. Sayii. There is but little 

 resemblance to the genitalia of H. iJalliata, so nearly allied b^- its' 

 shell. 



The specimens examined were collected in eastern Tennessee, 

 by Miss Law. 



Helix Nickliniana, Lea {Arionta). 



The genitalia are figured on plate IV. fig. iii. The ovary is yel- 

 low, long, narrow, concave on one side, convex and carinated on the 

 other. The accessory gland of the epididymis is composed of long, 

 white cseca. The oviduct is extremely long, narrow, convoluted. 

 The genital bladder is globular, small, with an extremely long 

 duct, to which is added an accessory duct or branch, almost as long 

 as the oviduct. This branch joins the duct near its end. It is 

 thicker than the duct. The duct enters the vagina at its upper 

 part. The penis sac is long, cylindrical, small, almost equalling 

 in length the oviduct and ovary united. The retractor muscle is 

 Inserted at about the middle of its length, it is attached to the dia- 

 phragm ; the vas deferens enters about three-fourths of its length ; 

 beyond the vas deferens is a flagellate extension. The vagina is 

 long and narrow ; near its base, opposite the entrance of the sac 

 of the penis is a stout, cylindrical, long, hollow, vaginal prostate, 

 gradually tapering at its apex, and extended into a delicate tube, 

 which soon becomes divided into two long flagella. Just beyond 

 the division, on each flagellum, is a stout bulb-like enlargement. 



This complicated form of genitalia, hitherto unnoticed in Ame- 

 rican species, has been noticed in European species. 



Patula strigosa, Gould, pi. IV., fig. ii. 



Represents the genitalia of a Salmon River specimen. The 

 testicle, as usual, was in the summit of the upper lobe of the liver. 

 The epididymis is long, convoluted in its half nearer the testicle. 

 The accessory gland is composed of several long, black coeca. 

 The oviduct is sac-like, not convoluted, containing eight embr^'onic 

 4 



