FOSSARUS. 271 



FAMILY FOSSARID^E. 

 Genus FOSSARUS, Phil, 1841. 



F. AMBIGUUS, Linn. PI. 52, figs. 3-5. 



Spirally striated, three of the striae usually more prominent so as 

 to cause the body whorl to appear angulated or carinated, epidermis 

 light yellowish brown, aperture white. Length, 5 mill. 



Mediterranean, Senegal. 



The synonyms include F. Adansoni, Phil., F. Lanoei, Baudon, 

 P. lucullana, Scacchi, F. Sicula, Aradas, F. costatus, Scacchi, F. 

 Kutschigi, Brusina. 



F. ELEGANS, Verrill & Smith. PI. 51, fig. 96. 



Spirally carinated, the last whorl with a carina at the shoulder, 

 often with a smaller one just below it, a larger one again at the 

 periphery, and three or four smaller ones below, besides a spiral 

 fold round the umbilical region ; there are also sometimes two or 

 three strong raised varices, whorls latticed between the carina?, 

 white, umbilicus narrow, sometimes closed. Length, 5'3 mill. 



Off Martha's Vineyard, Mass.; 100 fms. 



This may prove to be a variety of F. ambiguus. 



F. ORBIGNYT, Fischer. PI. 52, fig. 6. 



Umbilicated, white, rugose, with several distant spiral riblets, the 

 interstices longitudinally striate ; whorls 4, convex, with excavated 

 suture. Length, 8, diam. 9 mill. 



Cuba. Sta. Lucia, Jamaica. 



Described by d'Orbigny as F. sulcatus, and changed as above on 

 account of F. sulcatus, Wood. 



F. MEDIOCRIS, Folin. PI. 51, fig. 97. 



Minute, imperforate, spirally ribbed, the sulci between the ribs 

 longitudinally crenately striate ; whorls 4, convex, with simple 

 suture, chestnut colored. Length, 2*6 mill. 



Bay of Panama. 



F. LAMELLOSUS, Montrouz. PI. 52, fig. 7. 



Imperforate, solid, with acute spire and dilated base, with sharp, 

 distant spiral ribs, of which there are four on the body whorl, the 

 two upper ones strongest, interstices longitudinally lamellarly striate. 



Length, 6-8 mill. 



New Caledonia. 



