684- 



17. Tapes turgida (pi. cxlvii. f. 53, 54), Lamarck (Venus), 

 Anim. sans vert. no. 39. var. Venus rufa, Lam.no. 30. Venus 

 ovulea, Lam. No. 59. V. dorsata, Lam. no. 31. 



T. testa ovali, subquadrata, ventricosa, costellis concentricis 

 validis postice laminatis lirata, radiatim minute striata; fulva, 

 rufescente, maculis fuscis radiata, intus roseo tincta ; latere antico 

 brevi, rotundato ; latere postico lato, angalato, truncato ; margine 

 dorsali postice elevato, antice lunulato et literato ; margine ven- 

 trali rectiusculo. 



Very ventricose and angular at the back, with fine radiating 

 stria; over distinct concentric ridges, which arc laminated at the 

 hinder side. The colour is reddish-fawn, more or less obscurely 

 lettered and rayed with large dark brown spots ; a pinkish tint 

 within. A variety occurs nearly white and spotless. 



Australia. 



18. Tapes literata(p1. cxlvii. f. 43, 44, 45, 46, 47, 48, 49), 

 Chemn. (Venus), t. 41. f. 432-3-4. var. Venus punctata, Chemn. 

 t. 41. f. 436, 437. var. Venus nocturna, Chemn. t. 41. f. 435. 

 V. punctifera, Lamarck, no. 38. 



T. testa magna, subcompressa, concentrice minute subundulatim 

 lirata; fulva vel alba, varie picta; latere antico brevi, subacuini- 

 nato ; latere postico clongato, lato, subangulato, subtruncato ; mar- 

 gine dorsali postice elongato, rectiusculo, depresso, angustato, antice 

 lanceolatim lunulato, declivi ; margine ventrali postice subarcuato. 



This large well-known species is variously marked with angular 

 lines, broad patches, or spots of brown. 



Australia. 



19. Tapes aspersa (pi. cxlvii. f. 52), Lamarck (Venus), 

 Anim. sans vert. no. 37. T. litterata, var. Dillwyn. 



T. testa magna, subcompressa, concentrice subundulatim sulcis 

 distantibus lirata, fulva, griseo obscure literata, vel nigro-puncta- 

 ta, maculis magnis nigrescentibus et albis alternatim quadrira- 

 diata; latere antico brevi, subacuminato, declivi; latere postico 

 subdeclivi, elongato, lato, subtruncato ; area dorsali angulatim 

 excavata ; margine ventrali paululuin arcuata. 



The regular rays of black spots on whitish ground, and the 

 much greater breadth of the ribs, may be considered as distinguish- 

 ing this species from T. aspersa. The latter character is the most 

 important. 



Philippines, Cumin g . 



