667 



43. Artemis calculus (pi. cxlii. f. 53), Reeve, Conch, icon. 

 Art. pi. viii. f. 47. 



Art. testa albido-fuscescente, tenui, compressa, concentrice 

 tenuissime striata ; striis ad latera elevatiusculis, convergentibus ; 

 area ligamenti subexcavata. 



Thin, whitish or light brown, very minutely striated, the striae 

 elevated and converging at the sides ; ligamental area not very 

 distinctly marked by the edges of the concentric ridges. 



Catannan, island of Luzon, Philippines ; in fine sand at low 

 water. Cuming. 



44. Ae,temis biscocta (pi. cxlii. f. 50), Reeve, Conch. Icon. 

 Art. pi. ix. f. 55. 



Art. testa pallide fulva, suborbiculari, concentrice striata, striis 

 aspcris ad latera elevatiusculis convergentibus; area ligamenti 

 lanceolate excavata ; lunula impressa. 



Differing from the rest of the group in the sharp and rough 

 character of the raised stripe, which prevents the silkiness of 

 appearance near the umboes, which may be observed in A. Afri- 

 caua, etc. 



Japan. Siebold. 



45. Artemis fibula (pi. cxlii. f. 49), Reeve, Conch. Icon. 

 Art. pi. v. f. 36. 



Art. testa lutescente-alba, alta, subcompressa, ad latera sub- 

 angustata, concentrice creberrime striata, striis ad latera vix ele- 

 vatis, convergentibus ; margine laterali antico elevato ; lunula, 

 profundissime impressa ; area ligamenti acute excavata, laevigata. 



" Principally remarkable for the depressed growth of the lu- 

 nule," otherwise resembling A. biscocta. 



Mouth of the Gambia, Western Africa. 



46. Artemis cretacea (pi. cxlii. f. 51), Reeve, Conch. Icon. 

 Art. pl.vi. f. 35. 



Art. testa A. biscocta simili, sed striis conccntricis valide tenui- 

 oribus. 



There is a chalky appearance arising from the closely laminated 

 striae of this shell, which distinguishes it from A. biscocta and 

 others of the group. 



Manilla, island of Luzon, Philippines. Cuming. 



