Dentition of Puhnonata. 27 



oviduct, narrowed at its base, along the remainder of its course quite 

 stout, but with a subcentral contraction, and a blunt apex, where the re- 

 tractor muscle (C) is attached, and where the vas deferens (7) enters, the 

 latter swollen at this point. The genital bladder (9) is small, oval; its 

 duct (1G) is long, irregular, narrowed above and below, but very much 

 swollen along the middle three-fifths of its length. As with the penis, the 

 duct of the genital bladder forms a conspicuous feature of the system. 



Helix nucleola, Rang. (Dentellaria.) 

 Martinique. 



Lingual membrane and jaw already described by me (Proc. Ac. Nat. 

 Sc., Phila., 1874, p. 52). 



Genital system figured on pi. II, fig. vi. The ovary (11) is long and 

 narrow. The oviduct (8) is long, rather stout, but little convoluted. 

 The vagina is narrow, about one-third the length of the oviduct; just 

 below the middle of its length it has a bulbous expansion, which receives 

 the long, slender duct (16) of the small, oval genital bladder (9). The 

 penis sac (5) enters the vagina near its base; it is very long, cylindrical, 

 slender, with the vas deferens (7) aud retractor muscle entering at its 

 apex. 



Helix Josephinse, Fer. (Dentellaria.) 



Guadeloupe. 



For description of jaw and lingual membrane, see Ann. Lye. N. H. of 

 N. Y., X, 306. 



Genital system figured on pi. V, fig. ix. The testicle (1) is composed 

 of white caeca tipped with brown. The epididymis is greatly convoluted 

 near the ovary. The latter organ (11) is broad. The oviduct (8) is long. 

 The vagina is long and narrow; it receives the long slender duct (16) of 

 the small globose genital bladder (9) near its top. The penis sac (5) is 

 long and slender, its opening being by the side of that of the vagina, 

 rather than actually into the latter organ, its apex rapidly narrowing to 

 an acute point, near which enters the vas deferens (7). 



Helix discolor, Fer. (Thelidomus.) 

 Martinique. 



Jaw and lingual membrane already described by me (Proc. Ac. Nat. 

 Sc. Phila,, 1874, p. 51). 



Genital system short and stout in its various parts, excepting the ovary 

 (11) which is long, slender, acutely pointed. The epididymis (2) is long, 

 convoluted at the end near the oviduct. The oviduct (8) is stout, sac-like. 

 The genital bladder (9) is as long as the oviduct, clavate, stout, with no 

 distinct duct, but gradually tapering to its entrance into the vagina, 

 which is at the upper end of the latter. The penis sac (5) is the most 



