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 SKENEID^E. 

 Genus SKENEA, Fleming. 1828. 



S. SUBCANATICULATA, E. A. Smith. PI. 60, figs. 98, 99. 



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

 ted; whorls 32, 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, patulously umbilicated, opaque, brownish- 

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

 cylindrical, rapidly increasing, smooth, base subconcave, suture 

 deep. Diam. T4 mill. 



Europe, Greenland to Massachusetts. 



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

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

 here. 



S. SERPULOIDES, Montg. PL 60. figs. 1, 2. 



Widely umbilicated, its wall with spiral striae, brownish yellow, 

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



Diam. 1 mill. 



Europe.' 



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

 Hanley. 



Unfigured Species. 



S. HELICINA, (Jeffreys, Ms.), Monts. Mediterranean. 



S. pellucida, Monts. is a synonym. 



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



S. CORNUELLA, A. Ad. Japan. 



Family CHORIST1DJE. 

 Genus CHORISTES, Carpenter. 1872. 



C. ELEGANS, Carp. PL 61, fig. 3. 



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



