1 4 SOLARIUM. 



and ribbed near the umbilicus, ribs crenulated ; -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 sulcus below 

 the suture, and ribs above and below the periphery. 



S. IMPRESSUM, Nevill. PI. 4, figs. 52, a b. 



Umbilical crenulations white ; whorls f>, 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 spiral!}^ 

 ribbed; aperture subquadrangular. Diam. 6 mill. 



Ceylon. 



Utifigured and Doubtful Species. 



S. CALCAR, Costa. Mediterranean. 



S. WROBLEWSKYI, Morch. Eio Janeiro. 



S. KREBSII, Morch. Porto Plata ; Curasao. 



S. TRTCARINATUM, Stearns. }\ r est Indies. 



S. VALEXCIKNNESII, Morch. Peal jo. 



Subgenus PHILIPPIA, Gray, 1840. 

 S. HYBRIDUM, Linn. PI. 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, usually of lighter color than the upper surface. 



Diam. 20 mill. 



Philippines; Java; Australia; Cei/lon. 



S. Layardi, A. Ad., and Trochns per spec tivunculus, Meusch., 

 are synonymous. 



Var. UNDATI M, Hanley. PI. 5, fig. 61, ('.:>. 



Color white, with narrow, radiating, undulating, reddish 

 blotches ; base with alternating bands of yellowish brown and 

 white. 



