252 LEPTOTHYRA. 



ficial ; base slightly excavated at the position of the umbilicus ; aper- 

 ture oblique, circular ; peristome white, thickened. 



Alt. !}, diam. 1? mill. (Martens.') 



Mauritius. 

 L. FOLTNI Pilsbry, ] 888. PL 57, fig. 58. 



Shell minute, turbinate, subglobose, vivid blood red ; whorls 4, 

 the first depressed, subcarinated, apical whorl subcostate, transverse- 

 ly lirate, lira? rounded, the wide interstices regularly minutely 

 transversely striate ; last whorl large, umbilicate ; aperture sub- 

 circular, right margin somewhat thickened, the left reflexed ; colu- 

 mella simple, arcuate. Alt, 1*2, diam. 1'5 mill. 



Mauritius, 



This is Turbo sanguineus de Folin, (preoc.) 



L. SEMILUGUBRIS Desh., 1863. PL 58, fig. 52. 



Shell small, turbinate, subglobose, white, marbled with black ; 

 spire somewhat obtuse ; whorls 5, declivous above, spirally deeply 

 sulcate, the sulci subgranulose ; last whorl large, base perforate ; 

 aperture circular, pearly within, very oblique;' columella arcuate, 

 flat, truncate anteriorly. Alt. 3, diam. 3 mill. 



Mauritius. 

 L. CARINATA ( antraine, 1835. PL 63, fig. 35. 



Shell subconic, thick, glabrous ; upper whorls carinated, the last 

 depressed above, lightly striate in the median portion ; base smooth, 

 shining. (Cantraine.*) Alt. 10, diam. 11 mill. 



Mediterranean and Bay of Biscay, 125 to 731 fms. 



Also found in the Italian and Sicilian Tertiary. 



Trochus carinatus Cantr., Bull. Soc. Roy. Bruxelles, 1835, p. 387. 

 (not Trochus carinatus Borson, Mem. Ac. Torino, 1822, which is ap- 

 parently a species of Astralium.) 



Trochus gfabratus Phil., Fauna Moll. Sicil., 1844, is synonymous. 



This deep water form of the Mediterranean and adjacent Atlan- 

 tic, seems to be specifically identical with the Western Atlantic 

 shells dredged by the CHALLENGER and the BLAKE and describ- 

 ed under the names T. indutus Watson and L. albida Dall. I 

 have before me specimens of the latter form which correspond very 

 nearly with Cantraine's figures. 



Var. PELORITANA Cantraine, 1835. PL 63, fig. 34. 



Shell subconic, thick, very lightly striate, transversely subcostate 

 the costa3 subgranose ; whorls convex ; base shining, smooth. 



Alt, 12, diam. 13 mill. (Cantraine.) 



Trochus filosus Phil., 1844, is synonymous. 



