14 SOLARIUM. 



and ribbed near the umbilicus, ribs crennlated ; color pale- 

 fulvous with distant reddish brown spots on the periphery ; base 

 slightly concave near the periphery, somewhat swollen near the 

 middle. Diam. 12-25 mill. 



Bay of Magdalena, L. California. 



This species is remarkable for the absence of a snlcus below 

 the suture, and ribs above and below the periphery. 



S. TMPRESSUM, Xevill. PI. 4, figs. 52, a b. 



Umbilical crenulations white ; whorls 5, granosely shouldered, 

 obsoletely spirally ribbed, ribs four or five, minutely granose, 

 periphery roundly angular; color glassy white, with obliquely 

 radiating patches of chestnut, or of a uniform reddish ; base 

 very convex, with two impressed spiral lines and an interrupted 

 brown band near the umbilicus, umbilical wall obsoletely spiralty 

 ribbed ; aperture subquadrangular. Diam. 6 mill. 



Ceylon. 



Unfigured and Doubtful Species. 



S. CALCAR, Costa. Mediterranean. 



S. WROBLEWSKYI, Morch. Rio Janeiro. 



S. KREBSIT, Morch. Porto Plata; Curasao. 



S. TRICARINATUM, Stearns. West Indies. 



S. VALENCIENNESII, Morch. Eealjo. 



Subgenus PHILIPPIA, Gray, 1840. 

 S. HYBRIDUM, Linn. PL 5, figs. 59-62. 



Umbilicus contracted, crenulations white, very strong ; whorls 

 smooth, ribbed at the periphery, spirally sulcate, and ribbed 

 above and below the periphery and near the umbilicus ; color 

 varying shades of reddish brown with patches of white ; base 

 very convex, usualty of lighter color than the upper surface. 



Diam. 20 mill. 



Philippines; Java; Australia; Ceylon. 



S. Layardi* A. Ad., and Trochus perspectwunculus, Meusch., 

 are synonymous. 



Var. UNDATUM, Hanley. PL 5, fig. 61, 02. 



Color white, with narrow, radiating, undulating, reddish 

 blotches ; base with alternating bands of yellowish brown and 

 white. 



