LIMN^A. 91 



5. LIMN^A AMPLA, Mighels. 

 Plate 16, figs. 6, 7, 8. 

 Plate 16, fig. 9, L. Binneyi, Tryon. 

 Plate 16, fig. 10, L. Sumassi, Baird ? teste Binuey. 

 Hald., t. 14, figs. 4, 5. 



Shell large, much inflated, suboval, rather 

 thin, composed of five convex whorls, promi- 

 nently shouldered at the upper part; epidermis 

 of an obscure olivaceous green color ; lines of 

 accretion very fine and compact; transverse 

 lines obscure ; suture deep, and in one speci- 

 men canaliculate; spire short, and pointed 

 when present ; aperture oblong, very wide at 

 the posterior part, but narrowing rapidly ante- 

 riorly and occupying rather more than two- 

 thirds the length of the shell ; labrum thin 

 and somewhat reflected; labium broadly re- 

 flected, forming and partially covering an open 

 and very deep umbilicus ; columella fold very 

 prominent. 



Length 33, diam. 25 mill. 

 (65) 



