16 land and fresh-water shells of n. a. [part ii 



Fossil Species. 



Melampus priscux, Meek, Phila. Acad. Nat. Sc. Proc. 1860, 315. 

 Melampus (Ensiphurua) longideris, Co>ead, Pr. A. N. Sc. Phila. 1862, 584. 



TRALIA, Gray. 



Foot posteriorlj acute, entire. 



Shell ovate, smooth ; spire elevated ; aperture 

 narrow, linear, dilated anteriorly ; inner lip usually 

 with tliree oblique plaits ; outer lip acute, .sinuated 

 posteriorly, internally wnth one or more transverse, 

 elevated ridges. 



This genus differs from Melampus in having the 

 foot entire posteriorly, not bifid. It is not admitted 

 by Pfeifi'er. 



Tralia floridana, Shcttl. — Shell imperforate, ventricose, fusiform, 

 thin, smooth, grayish, with varying chestnut bands ; spire regularly conic, 

 acute ; suture linear ; whirls ten, flattened, the upper ones 

 radiately striate, the last comprising three-fifths of the 

 length of the shell, obsoletely angulated above, and very 

 much smaller at its base ; aperture snbvertical, narrow, 

 angular ; two parietal plic?e, one strong, one on the colu- 

 mella, obliquely continued towards the base ; peristome 

 acute, its right side in adult specimens armed with trans- 

 verse, white, subequal folds, its columellar portions both 

 short and callous. Length 7|, diameter 4| ; aperture in 

 length almost 5, in breadth I5 millimetres. 



Auricula Jloridana, Shdttleworth, MSS. 



Melampus Jloridanus (Tralia'), Adams, Pr. Zool. Soc. II, 1854 (no desc). 



— Pfeiffer, Malak. Blatt. (1854) ; Mon. Auric. Viv. 36 ; Brit. Mus. 



Cat. 25.— W. G. BiNXEY, T. M. IV, 165, pi. Isxv, f. 30. 



Fig. 17. 



Found at Florida Keys. 



' I do not know what species this represents, 

 by Dr. Stimpson, in Charleston harbor. 



It was drawn from nature 



