688 



rubescente-albo sparsim maculata, maculis fuscis parvis quadri- 

 radiata ; margine dorsali deelivi. livido ; margine ventrali subrotun- 

 dato ; lunula distincta ; umbonibus lividis. 



Something like T. incerta, but more oblique and more de- 

 pressed. The hinder part is less angular, but more truncated. 

 The four rays, composed of small square spots, are remarkable, 

 and the umboes are purplish. 



Locality unknown. In Mr. Sowerby's collection. 



32. Tapes florida (pi. cxlix. f. 112, 113), Lamarck 

 (Venus), Anim. sans vert. no. 66. Var. V. intuspuncta, Phi- 

 lippi, Abbild. t. v. f. 7 ? 



T. testa, ovali, tenui, concentrice striata, varie picta, iutus 

 aurea ; latere antico breviusculo, subacuminato ; latere postico 

 subexpanso, vix tmncato. 



Not so distinctly grooved nor so much truncated at the back as 

 T. texlurata. It is variously marked, but the largest markings 

 are principally at the back. 



Mediterranean. 



33. Tapes floridella (pi. cxlix. f. 96, 97, 98, 99, et test, 

 jun. f. 105), Lamarck (Venus), Anim. sans vert. no. 69. Venus 

 bicolor, Lam. no. 68. Venus pulchella, Lam. no. 71. 



T. testa ovali, utrinque acuminata, concentrice striata, varie 

 picta, intus aureo et purpureo tincta ; latere antico brevi, acumi- 

 nate ; lunula plerumque livida vel fusca ; latere postico oblique 

 subtruncato. 



After examining a great number of specimens, I conclude to 

 separate this species from T. florida, on account of the greater 

 acumination of the extremities. The colouring is equally variable. 



Mediterranean ? 



34. Tapes arenosa (pi. cxlvi. f. 33, copied), Philijjpi, 

 Abbild. Venus, pi. vii. f. 6. 



T. " testa ovato-oblonga, transvcrsim striata, lineisque radianti- 

 bus obsoletis decussata, albida, lineolis angustis rufis angulato- 

 flexuosis picta ; extremitate postica sensim attenuata, subrostrata ; 

 lunula lanceolata, violaceo-lineata ; area angusta, profundata, vix 

 distincta." 



Prom the figure and description as here copied, I am partly 

 inclined to think this may be a variety of T. florida. 

 Locality unknown. 



