KEY TO UROCOPTID.E. XXxix 



6 1 . Smaller, slender species, 4.5 mm. diam. or less; 

 truncate. 



c. Uniform brown, rose or white; very finely, 

 evenly striate ; last whorl shortly free, cari- 

 nate below. Jamaica. 



Bactrocoptis, xv, p. 143. 



c 1 . Whitish, brown or variegated, striate or 

 rib-striate; last whorl free, with the basal 

 keel weak or wanting; amputated apical 

 whorls smooth. Western Cuba, Florida. 



CoModinella, xv, p. 175. 

 c 2 . Clear corneous; evenly striate; last whorl 

 subangular below. Amputated apex nor- 

 mal, costulate. E. Cuba to Porto Rico. 



Brevipedella, xvi, p. 45. 



c 3 . Similar, but apical whorl elevated. Jamaica. 

 Simplicervix, xvi, p. 94. 



6 2 . Shell obesely fusiform, striate; apex not atten- 

 uate, smooth, often persistent; whorls 12-13 in 

 entire shells. Axis slender, straight. Haiti. 



Liparotes, xvi, p. 57. 



6 3 . Shell slender, tapering, fusiform or sub- 

 cylindric, the apex often entire; neck 

 round. 



c. Axis weakly 1 or 2 plicate. Western 

 Cuba. Tetrentodon, xv, p. 267. 



c 1 . Axis straight and simple. Eastern 

 Cuba. Siphonol&mus, xvi, p. 58. 



a 2 . Shell small, dextral, ribbed, with round or squar- 

 ish aperture, the neck strongly carinate below and 

 swollen on the right side; axis slender, straight or 

 with one weak spiral. Brachypodella, xvi, p. 64; 

 Geoscala, xvi, p. 90. 



2. Peristome incomplete, widely interrupted above, the 

 parietal wall with merely a thin callous film. Axis 

 straight or slightly twisted; spire usually strongly 

 tapering. 



a. Shell truncate, fusiform, the surface glossy, often 

 bright colored. Anoma, xvi, p. 1. 



