234 ASTICALIUM. 



delicate, distantly nodose, concentric, inequal lira? ; aperture circu- 

 lar, augulate at carina, lip below horizontal ; columella smooth, 

 rounded, arcuate. Alt. 7-j, diam. 12 mill. 



Australia. 

 Seems to be a young shell. 



A. PETEOSUM Martyn, 1784. PL 64, figs. 65, 66. 



Shell conic, imperforate, solid, greenish or cinereous ; whorls 6, 

 above planulate, obliquely radiately plicate or wrinkled ; periphery 

 bicarinate, with two rows of rather short radiating spines, about 12 

 in number on the body-whorl in the upper row, smaller and more 

 numerous in the lower ; base flattened, concave toward the center, 

 concentrically densely squamose-lirate ; aperture transverse, white, 

 pink or blue inside, channelled at the carina ; peristome crenulate, 

 columella wide, with a slight semilunar groove and a denticle near 

 the base, generally more or less purplish, pink or bluish. 



Alt. 30-35, diam. 32-40 mill. 



Viti and Hawaiian Is. ; New Caledonia; Lid Ian Ocean. (?} 



Operculum (pi. 64, fig. 64) oval, rugose, outside, with a broad 

 central curved callosity ; center excavated ; color usually the same 

 as the columella. 



T. rhodostomus Lam., and T. tuberosiis Reeve (not Phil.) are syn- 

 onyms. T. spinulosits Reeve is probably a depressed form of this 

 species. 



Martyn's name has been overlooked by most authors, but I see 

 no reason for rejecting it for that of Lamarck. His figures in the 

 '" Universal Conchology " are so superior as to compare favorably 

 with modern work ; and represent unmistakably the typical form, 

 with the two subequal rows of spines upon the periphery. 



Var. COXFRAGOSUM Gould, 1848. PI. 54, fig. 56. 



Shell low conical, rugose, the wrinkles small, rounded, irregular, 

 oblique, slightly squamose here and there; whorls 6, somewhat 

 shouldered above, declivous at the upper part, obtusely biangulate 

 toward the base ; periphery augulate, stellate by the projection of 

 folded ribs ; base plane, encircled with about eight squamose ridges. 



Dean's Is., Paumotus Group. 



[ have copied Gould's figure of this form and have added two 

 which are identified by Dr. Fischer with it. These last are much 

 more prominently plicate above, and have colored columella, a 

 character not mentioned by Gould. 



