(591 



the liiuder part ; the surface is marked by diverging short striae 

 in the direction from top to bottom ; the marking consists of dull 

 greyish rays in front and twig-like touches at the back. 

 PhiHppines. Cuming. 



42. Tapes coerugata (pi. cl. f. 121, 122), Gmel. (Venus). 

 Venus obsoleta, Chemn. vol. vii. pi. 42. f. 444. 



T. testa ovali, compressa, sordide alba, intus purpureo tincta, un- 

 dulatim rugosa, postice subangulata, elongata, obtuse subtruncata, 

 post angulum rugis magnis lirata ; antice brevi, subrotundata. 



Rather flat, of a slightly angulated form, nearly white, purple 

 within near the posterior margin and on the hinge ; with the ex- 

 ternal surface corrugated by broken, undulating riblets, which are 

 strongest behind the slight oblique posterior angle. 



Mediterranean. 



43. Tapes dactyloides (pi. cl. f. 129), Sowerhi/,jun. 



T. testa T. corrngata simili, sed multo magis ventricosa, magis 

 elongata et cylindrica, rugis magis disruptis. 



Not so flat nor so broad, but more cylindrical and longer than 

 T. corrngata, with the rugosities more broken up. 



Locality unknown. Specimen in M. Gubba^s collection. 



44. Tapes disrupta (pi. cxlix. f. 95), Sowerht/,jun. 



T. testa T. corrngata simili, sed rugis postice laminatis, magnis, 

 antice valde disruptis ; margine dorsali elevato, recto ; testa 

 colore varie picta. 



Not so oval, but still much like T. corrngata ; the hinder part 

 has the ridges large and laminated, the front part shows them as 

 it were broken up and distorted ; the shell is prettily coloured, 

 especially at the beaks and within. 



Mediterranean ? 



45. Tapes opaca (pi. cl. f. 123), Sowerly (Venus), Zool. 

 Proc. 1835, p. 42. 



T. " testa oblonga, subquadrata, subturgida, Isevi, opaca, albida, 

 pallidissime purpurascente ; latere antico breviore, rotundato, con- 

 centrice ruguloso, postico subrotundato, supra infraque subangu- 

 lato ; margine interno iutegerrimo ; ligamento permagno." 



Oblong, large, squarish, moderately ventricose; the front side 

 the shorter, with equidistant raised coucentric lines reaching over 

 the third part of the sheU, the rest being smooth. 



Chili ; sandy mud at low water. Cuming. 



