657 



6. Artemis Patagonica (pi. cxl. f. 8), Philippi (Cytheraa), 

 Abbild. pi. ii. f. 1. 



Art, testa subquaclratim rotuiidata, subcompressa, albida, epi- 

 dermide tenui induta, concentrice sulcata ; margiiie dorsali sim- 

 plici, parum arcuata; umbonibus amplioribus, lateralibus. 



Not so wide in proportion to its height as A. ponderosa and 

 A. concentrka, but of a rather more obliquely square form, with 

 the umboes very lateral and full. 



Patagonia. Philippi. 



7. Artemis Dunkeri (pi. cxl. f. 5), Philippi (Cvthersea) 

 Abbild. Cijth. pi. ii. f. 5. JJ y . ) 



Art. testa rotundata, vix latiore quam alta, alba, epidermide 

 pallida induta, concentrice sulcata, sulcis continuis, in medio sub- 

 distantibus ; margine dorsali declivi ; lunula excavata. 



Higher than A. concentrica, with the dorsal margin more 

 sloping, and the lunule not so deeply excavated. 



St. Elena and Panama, Central America; sandy mud at low 

 water. Cuming. 



8. Artemis simplex (pi. cxl. f. 6), Hanley, Cat. Eeceiit 

 Shells, pi. XV. f. 41. 



Art. testa obhque altiore quam lata, alba, epidermide tenui in- 

 duta, concentrice sulcata, sulcis numerosis, sequahbus, continuis; 

 margine dorsali obliquo ; lunula impressa, vix excavata. 



More obliquely elevated at the umboes (which are lateral), 

 than any of the group beginning with A. concentrica, with the 

 dorsal margin more sloping, and the grooves more numerous and 

 regular than A. Bunkeri. 



Locality unknown. 



9. Artemis concinna (pi. cxl. f. 4), Sowerhy,jun. 



Art. testa ovali, alba, concentrice tenue striata, latiore quam 

 alta ; epidermide tenui, nitente. 



More oval and with finer sulci than A. simplex and similar 

 species. 



Locality unknown. 



10. Artemis discus (pi. cxl. f. 9), Reeve, Conch. Icon. pi. ii. 



Art. testa compressa, subquadi-ata, subtiliter striata, pallide 

 fulva, prope marginem palhdissime grisescente, omnino tenue in- 



