674 



is flatter, and the concentric ridges, instead of being thickened, 

 are raised and laminated at the sides. 



Bay of Manilla, isl. Luzon, Philippines ; sandy mud. Cuming. 



68. Artemis scalaris (pi. cxliv. f. 78), Menhe (Cythersea), 

 Moll. Nov. Holl. p. 42. no. 241. 



Art. testa rotundata, subcompressa, paululum latiore quam 

 alta, albida, rufo pallido plus minusve radiatim et interruptim 

 picta, concentrice costellata ; costellis in medio planatis, ad latera 

 tenue laminatis et elevatis ; lunula brevi, impressa, excavata. 



Larger and broader than A. juvenilis, the colouring a more 

 delicate fawn, and all the ribs continued to the sides, where they 

 are close and laminated. 



Mouth of the Swan River, New Holland. 



69. Artemis anus (pi. cxliv. f. 82), Philijjpi, Abbild. Ci/th. 

 pi. viii. f. 1. 



Art. testa subquadrato-orbiculari, subcompressa, crassa, con- 

 centrice costellata, pallide fasciatim fulva, ad apicem rufescente ; 

 costellis acutis, subirregularibus, ad latera paucis, elevato-lamina- 

 tis, snbdivaricatis ; lunula profundi impressa, laminata ; area liga- 

 menti angulatim excavata, plana. 



Rather squarish at the sides, sharply costellated, with the ribs 

 few, laminated and divergent at the sides, so as to give a wrinkled 

 appearance. The ligamental area is Hat and angularly excavated. 



New Zealand. Earl. 



70. Artemis prostrata (pi. cxliv. f. 80), Linn. Syst. Nat. 

 12th edit. p. 1133. 



Art. testa oblique quadrata, compressa, pallide fulva, concen- 

 trice costellata; costellis ad latera irregula'riter et interruptim 

 convergentibus et corrugatis, ad marginem dorsalem elevatim 

 sublamellosis ; area ligamenti subexcavata ; lunula subelongata. 



Not very far removed from A. anus; it is much squarer and 

 flatter, with the riblets more irregularly wrinkled and more ele- 

 vated at the dorsal margin. 



Mouth of Swan Eiver, New Holland. Collie. 



71. Artemis laminata (pi. cxliv. f. 86, 87), Reeve, Conch. 

 Icon. pi. vii. f. 41. 



Art. testa alba, orbiculari, concentrice laminata ; laminis sub- 



