LEPTOTIIYRA. 255 



I.. coELATA A. Ad., 1854. PI. 48, fig. 38. 



Shell ovate-conoid, trochiform, thick, slightly elevated, below 

 subdepressed, umbilicate ; spire obtuse ; whorls 5-6, slightly convex, 

 longitudinally and obliquely striate, spirally granose-lirate ; suture 

 impressed; last whorl obtusely angular at the middle, with 16-18 

 spiral granose lirte, the granules small, close; aperture transversely 

 ovate, silver}' within ; lip simple ; columella narrow, arcuate, thick- 

 ened at the base ; umbilicus deep, with a spiral funicle inside ; co- 

 lor reddish yellow. Alt. 11, diam, 16 mill. 



Mogador ; E. coast Africa. 

 Operculum calcareous. 



This is the Omphallus coelaius A. Ad., and the Turbo MacAn- 

 dreivi Morch, T. maca»drel Sby. It is the type of Anadema A. Ad., 

 proposed as a subgenus of Omphalius, and characterized by the 

 spiral funicle within the umbilicus. 



L. FRiCKii Crosse, 1865. Unfigured. 



Shell narrowly umbilicated, depressed-turbinate, delphinuliform, 

 r<omewhat thick, spirally finely striate, bicostate, white, more or less 

 variegated with black ; suture subcrenulated ; whorls 4, (embryonic 

 I2 smooth, white j, rapidly increasing, subplane at sutures, the last 

 tri-costato-carinate, the costffi articulated with Avhite and black, 

 slightly descending ; base somewhat convex, spirally granulose- 

 striate ; aperture round, white, scarcely pearly, the basal margin 

 thickened. Alt. 4, diam. 02 mill. 



Gnlf of California. 



Var. beta is gray, obscurely maculated with black. 



L. EUCHARis Crosse, 1865. Vtifignred. 



Shell narrowly perforate, turbinate, delphinuliform, rather thick, 

 dirty white, spirally articulated with black and white, with longitu- 

 dinal very fine suboblique impressed stria; and spiral costate, the 

 central rib prominent, forming a carina ; apex obtuse, subplanulate • 

 whorls 4i, (embryonic I2 smooth, white, flat,) rapidly increasing, 

 convex, carinate, the last descending ; base slightly convex, concen- 

 trically costulate and finely radiately striate; aperture round, 

 Avhite, scarcely pearly, basal margin rather wide, subthickened. 



Alt. 6i, diam. 5^ mill. 



Habitat unknown. 



