672 



gosa, elevatim striata; area ligamenti excavata; lunula ampla, 

 subobsoleta. 



White, with the shape rather tending to trigonal, with roughish 

 riblets or raised strise ; ligamental area sharply excavated ; lunule 

 wide, rather indistinct. 



Nicobar Island. 



62. Artemis contusa (pi. cxliii. f. 70), Reeve, Conch. Icon. 

 Art. pi. vii. f. 38. 



Art. testa oblique subglobosa, crassa, albida, umbones versus 

 sublivida, concentrice coslellata, costellis complanatis ; area liga- 

 menti excavata, plana ; lunula impressa, lata. 



AVhitish, clouded witli dull blue near the umboes, rather thick, 

 smooth, and obliquely gibbous, concentrically ridged ; the ridges 

 rather broad and flat. The ligamental area angularly excavated, 

 and smooth. 



Point Cunningham, North Australia. Bring. 



Sect. 6. Edge of the dorsal area raised above the circum- 

 scribing line. 



63. AiiTEMis ALATA (pi. cxliv. f. 73), Rceve, Conch. Icon, 

 pi. iv. f. 20. 



Art. testa alba, sublsevigata, alta, plana, ad latus posticum 

 sulco profundo alam formante radiatim divisa ; lunula suboblonga; 

 umbonibus parvis, subarcuatis. 



A nearly smooth, white, tlat shell, remarkable for a radiating 

 groove at the hinder part, which separates a wing-shaped area 

 from the rest. As this may be equivalent to the raised liga- 

 mental areas in A. pnbescens and A. striatissima, I place the 

 species with them, although otherwise very unlike. 



Locality unlcnown. In Mr. Cuming's collection. 



64. Artemis ptjbescens (pi. cxliii. f. 72), Rhilippi [Cy- 

 therfsa), Abbild. t. 8. f. 3. Art. cselata, Reeve, Conch. Icon, 

 pi. V. sp. 28. 



Art. " testa subquadrato-orbiculari, lactea, striis transversis con- 

 fertis, versus utramque extremitatem paucioribus et lamellaribus 

 sculpta; lunula cordata, compressa, linea profundissima circum- 

 scripta ; area lineari-lanceolata, lamellarum extreraitatibus spinse- 



