CANTHARIDUS. 143 



pressed, obsoletely angular ; base slightly convex and like the 

 upper surface in color ; aperture a little oblique, subquadrate, 

 lirate Avithin ; columellar margin subarcuate, (implicate, basal and 

 outer margins thickened, rugose within. 



Alt. 15, diam. 10 mill. (Crosse.) 



St. Vincent's Gulf, South Australia. 



T. abnormis CROSS E, Journ. de Conchy 1. 1864, p. 341, t. 13, f. 2. 



C. ELONGATUS Wood. PI. 45, fig. 56. 



Shell imperforate or very narrowly perforate, conic-elongated, 

 thick, whitish, ornamented with radiating livid-brown flam mules, 

 brown punctulate ; whorls 9, convex, spirally lirate (the line un- 

 equal) and longitudinally nodose-costate, the nodules more promi- 

 nent below ; sutures impressed ; last whorl angulated, depressed 

 beneath the sutures, nodulous at the periphery ; very convex and 

 with about 8 concentric lira? beneath, the interstices with inter- 

 calated liruke ; aperture subquadrate, canaliculate within ; basal 

 margin arcuate, plicate; columella subangular, concave, strongly 

 truncate at base, with a short callous over the umbilicus. 



Alt. 33, diam. 22 mill. '(Fischer.) 



New Caledonian Archipelago. 



T. elouyatus WOOD, Ind. Test., suppl. t. 5, f. 19. PHILIPPI, 

 Conchyl. Cab., p. 200, t. 30, f. 4 ; Abbild. u. Beschr. ii, Trochus t. 



6, f. 6. T. att'enuatus JONAS, Zeitschr. f. Mai. 1844, p. 170. 

 Distinct from other species in its elongated form and strong longi- 

 tudinal plication. 



C. SERPENTINUS Quoy. PI. 46, fig. 63. 



Shell narrowly perforated, thick, conical, apex acute, grayish- 

 green, painted with radiating chestnut and white flammules ; whorls 



7, planulate, the first eroded, buff, the following scarcely shining, 

 encircled by 6 to 7 unequal lirse, above and beneath the suture 

 margined and obsoletely nodulose; last whorl carinated, convex 

 beneath and ornamented with 7 articulated concentric line ; aper- 

 ture rhomboidal; columella lightly arcuate, subtruncate below. 



Alt. 22, diam. 18 mill. (Fischer.) 



Guam, Marianne Archipelago. 



T. serpentinus QUOY in KIEXER, species, Genre Trochus, t. 45, 

 f. 3. CHENU, Manuel, ii, f. 2661. FISCHER, Coq. Viv., p. 131, 

 t. 45, f. 3. 



