14 SOLARIUM, 



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

 fulvous witli distant reddisii 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 sulcus below 

 the suture, and ribs above and below the periphery. 



S. iMPRESSL'M, Nevill. 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 spirall}^ 

 ribbed; aperture subquadrangnlar. Diara. 6 mill. 



Ceylon. 



Unfigured and Doubtful Specief^. 



S CALCAR, Costa, Medilerraneaii. 



S. Wroblewskyi, Morch, Rio Janeiro. 



S. Krebsii, Morch. Porto Plata ; Gura(;ao. 



S. Tricarinatum, Stearns. West Indies. 



S. Yalenciennesii, Morch. Realjo. 



Subgenus Piiilippia, Gray, 1840. 

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



Umbilicus contracted, crenulations white, very strong ; >vhorls 

 smooth, ribbed at the peripherj^, spirally sulcate, and ribbed 

 above and below the periphery and near the umbilicus ; color 

 varying shades of reddish brovvn with patches of white ; base 

 very convex, usualh^ of lighter color than the upper surface. 



Diam. 20 mill, 



Philippines; Java; Australia; Ceylon. 

 S. Layardi, A. Ad., and Trochus perspectivunculus, Meusch., 

 are synonymous. 



Var, UNDATUM, Hanley, PI. 5, fig. 61, G2. 



Color white, with narrow, radiating, undulating, reddish 

 blotches ; base with alternating bands of 3'ellowish brown and 

 white. 



