G79 



Sect. 1. Ventral margin smooth within. 



1. Tapes rariflamma (pi. cxlv. f. 3, 4<, 5), Lamarck (Venus), 

 sp. 45. Anim. sans vert. Var. Venus marmorata, Lamarck!' 



T. testa crassa, ovali, tumida, subsequilaterali, planulatim li- 

 rata, sulcis intermediis subdistantibus in medio subobsoletis fulva, 

 maculis elongatis castaneis et alteris albescentibus triradiata; 

 margine dorsali livido, rufo-liueato, excavato; margine ventrali 

 rotuudato. 



An oval tumid shell, with flat ribs divided by rather distant 

 grooves, which are more shallow in the middle ; the colouring is 

 bay, with three radiating rows of distant arrow-headed spots 

 with white spaces under them. 



Senegal. 



2. Tapes papilionacea (pi. cxlv. f. 1, 2), Lamarck (Venus), 

 Anim. sans vert. 



T. testa elongata, subcompressa, planulatim lirata, postice par- 

 tim laevigata ; straminea, griseo et rufo minute maculata, maculis 

 castaneis magnis quatuor radiata, intus ad marginem pm-pureo- 

 maculata; margine dorsali literato, postice arcuato, elongate, de- 

 clivi, antice excavato; lunula indistincta, lanceolata; margine 

 ventrali postice subtruncato, vix emarginato, antice elevato. 



Long, rather flat, with flattened ridges reaching nearly to the 

 back ; the dorsal edge is arched and gradually sloped at the back, 

 while in front it is rather excavated than otherwise ; it is marked 

 on both sides with fine lines. The ventral margin is more swollen 

 in front than at the back, but turned up towards the dorsal mar- 

 gin. It is straw-coloured, with greyish and reddish small spots, 

 and four radiating rows of large squarish chestnut-coloured spots. 

 The inner margin is marked with purple spots. 



Ceylon. 



3. Tapes lirata (pi. cxlv. f. 19), Fhilippi (Venus), Abbild. 

 pi. vii. f. 5. 



T. testa subrhomboidea, rotundatim sulcis profundis lirata; 

 paUide rufa, fusco punctatim literata, macidis magnis castaneis 

 quadriradiata ; margine dorsaU literato, utrinque rectiusculo, gra- 

 datim declivi, margine ventrali rectiusculo, antice paululura 

 elevato. 



4.'r 



