398 JEFFREYSIA-SKENEA. 



another series on the periphery of the last whorl ; whorls 4, convex, 

 with impressed suture. Length, 2 mill. 



New Zealand (on seawood). 



Family SKENEIDjE. 



Genus SKENEA, Fleming. 1828. 



■8. suBCANATicuLATA, E. A. Smith. PL 60, figs. 98, 99. 



Shell thin, subdiaphanous, whitish, widely, profoundly umbilica- 

 ted; whorls 02, slowly increasing, convex, with deep, almost chan- 

 neled suture. Diam. 1"3 mill. 



Kerguelen Island. 

 S. PLANORBis, Fabr. PI. 60, fig. 100. 



Rather thin, widely, i^atulously umbilicated, opaque, brownish- 

 yellow, or pale olivaceous, spire slightly elevated ; whorls 4, sub- 

 cylindrical, rapidly increasing, smooth, base subconcave, suture 

 deep. Diam. 1"4 mill. 



Europe, Greenland to Massachusetts. 



It is Helix depressa, Mont., and S. trochiformis, Locard. S, serpid- 

 oides of Gould and earlier American authors is also to be placed 

 here. 



S. SERPULOiDES, Montg. PI. 60. figs. 1, 2. 



AVidely umbilicated, its wall with spiral strire, brownish yellow, 

 smooth; whorls 4, cylindrical, spire a little elevated, suture deep. 



Diam. 1 mill. 



Europe. 



It is Delphinida Icevis, Phil. (fig. 1.), and S. divisa, Forbes and 

 Hanley. 



Unfigured Species. 



S. HELiciNA, (Jeffi-eys, Ms.), Monts. Mediterranean. 



S. pellucida, Monts. is a synonym. 



S. Petitii, Fischer. (Not a Skenea?) West Indies. 



S. coRNUELLA, A. Ad. Japan. 



Family CHORISTIDM 



Genus CHORISTES, Carpenter. 1872. 



C. ELEGAN.S, Carp. PI. 61, fig. 0. 



Thin, fragile, moderately umbilicated, epidermis thin, caducous, 



