ASTKVLU'M. 229 



gion covered witli a heavy callus, more or less stained with pinkish, 

 somewhat excavated at center. and obsoletely spirally ridded. 



Alt. IT), diain. (including spines) 70 mill. 



Oporculum (pi. 60, fig. 00). 



T. guildfordicB Ifeevo is a synonym. 



Subgenus BOLMA Ixisso, 1826. 



Shell turbinatc, spire conic, imperforate, whorls rounded at the 

 periphery, the upper ones spiny, base convex ; operculnm nearly 

 round, nucleus, exeentric, outside ])olished, concave 1 in the middle, 

 with a convexity or rib upon the center of the spiral. 



Mediterranean and Japanese Seas. 



Tubwanthiis Swains., 1840, is a synonym. 



In the Mollusca of the Challenger, p. 131, AVatson corrects the 

 orthography of this name, making it JJo/uia. But I find that Gray 

 and authors generally have not deviated from the orthography of 

 Kisso. (see J/!*t. Xat. (k VEnrnjie vnridionalc iv, p. 117). 



A. BUGOSUM Linn., 1767. PL 40, fig. 20; pi. 56, fig. So. 



Shell solid, conic, imperforate, brown or cinereous; suture canalic- 

 ulate, bordered below by a series of curved radiating tubercles ; whorls 

 (J-7, obliquely lamellose striate, the upper ones carinate and tuber- 

 cuhite or spino.se at the ])eri[)hery, the last descending, rounded or 

 bicarinate, spirally lirate ; base conspicuously radiately striate ; aper- 

 ture obliquely, transversely oval, pearly within; columella arched, 

 white, and pearly, with an orange callus dilated over the umbilical 

 region and extending over the parietal wall. Alt. 50, diam. 55 mill. 



Mediterranean Sea; Atlantic shores of Spain and S. IT. France; 

 Azorex, Madeira find Canary Is. 



Operculum (pi. 60, figs. 39, 40) short-oval, brown within, with 

 four whorls, the nucleus situated one-third the distance across the 

 face ; outside bright orange, polished, with a spiral callous ridge. 



T. cnHKin.cittix Val. is a synonym. 



A. MOPKSTUM. Reeve, 1842. PL 55, figs. 63, 64. 



"Shell imperforate, conically turbinated, orange-rose ; whorls con- 

 vexly sloping, then encircled with two rows of scales, papillary- 

 grained throughout; base rather Hat, tinged with chrome orange." 

 (Reeve). JJXDI. 



