Dentition of Pulmonata. 34 



modification of the laterals, with one large, long, inner, pointed cusp, and 

 two outer, small poinrts. See Proc. Phil. Acad. Nat. Sc, 1874, pi. vi, fig. 6. 



Cylindrella sanguinea, Pfr. 

 Jamaica. 



The genital system (pi. TI, fig. vii), as would be inferred from the shape 

 of the shell, is very much lengthened in all its organs. The testicle (1) 

 is in a globular mass lying close to the oviduct. The epididymis (2) is 

 short. The -oviduct (8) is very long and narrow'. The vagina is two- 

 thirds the length of the oviduct, it is nan'ow, with a bulbous expansion 

 at the insertion of the duct of the genital bladder, above its centre. The 

 genital bladder (9) is very small, globular, on a very narrow, long duct 

 (16), which expands at its entrance into the vagina. The penis sac (5) Is 

 short, thick as the oviduct, bluntly terminating above, where the vas 

 deferens (7) and retractor muscle (6) are inserted. The ovary (11) is 

 short and stout. 



Cylindrella brevis, Pfr. 

 Jamaica. • 



The genitalia have the same arrangement as in C. sanguinea, herewith 

 described. The duct of the genital bladder (16) in this species is much 

 more expanded before it enters the vagina, and the latter organ below the 

 junction is expanded to a greater size than the oviduct. The penis sac 

 (5) is shorter and stouter in hrevis than in sanguinea. PI. II, fig. iii. 



Bulimulus Altoperuvianus, Rve. {Drymams.) 

 Between Balsas and Cajamarca, Peru, Prof. Orton. 



Genitalia (pi. I, fig. n) of the same general form as I have herewith de- 

 scribed for those of Bulimulus Lobbi. The ovary (11) is smaller in pro- 

 portion, the oviduct (8) more developed. The duct of the genital bladder 

 (16) enters lower down upon the vagina. The testicle (I) is farther 

 removed from the ovary, lying in the apex of the shell. It is composed 

 of short, stout, blunt cseca. The ovary is of a dark slate color, the rest of 

 the genital system is white. The external orifice is behind the right eye 

 peduncle. The edges of the ovary are very deeply scalloped. 



The jaw has thirty-one ribs. It is of same type as that herewith de- 

 scribed of Bui. Lobbi. Lingual membrane (pi. I, fig. iv) of same type as 

 herewith described and figured for Bui. Lobbi as far as centrals and lat- 

 erals (a) are concerned. The marginal teeth, however, are quite diflerent 

 from those, of that species. They are quite like the laterals, excepting 

 that the cutting point is very much more produced, and somewhat curved 

 towards the central line of the membrane. 



These peculiar marginal teeth remind one of those of Helix Ghiesbreghti 

 as figured by Messrs. Fischer and Crosse. In that species, howevei", the 

 notch is on the outer, not the inner, side of the cutting point. 



