698 



dark purple colour inside, and has crenulations on the inner part 

 of the ventral margin. 

 Philippines. 



C7. Tapes lima (pi. cH. f. 144), 8owerby,jun. 



T. testa ovali, subquadrata, pallida, fusco sparsim variegata, 

 radiatim costata, costis rotundatis, serratis, concentrice hrata, 

 liris super costas acuminatis ; margine dorsali fulvo-lineato, pau- 

 lulum declivi, antice valide declivi ; lunula impressa, fulva ; mar- 

 gine ventrali rotundato, intus crenulato. 



The strong, rounded, radiating ribs are crossed by raised lines, 

 which are produced upon them into points. 



New Zealand. Specimens in Mr. Cuming's collection. 



68. Tapes discors (pi. cli. f. 148, 149, 150), Sowerhy 

 (Venus), Zool. Proc. 1835, p. 42. 



T. "testa obovali, crassiuscula, radiatim confertim striata, antice 

 rngis decussata, alba, fusco-nigricante instrata, coloribus valvse 

 alterse diversimodo ordinatis ; linea dorsali elevatiuscula ; intus 

 alba, postice violaceo tincta ; margine ventrali crenulato." 



Pormed like T. decussata, but more oval, and the ventral mar- 

 gin crenulated within. The dorsal edge is slightly sloping and 

 one valve overlaps the other ; at the end it is angular. The ra- 

 diating ribs are denticulated at the back of the shell, rather sharp- 

 edged and laterally flattened in the middle, and traversed by cre- 

 nulated raised concentric lines in the front. The markings of 

 dark brown colour always differ in the two valves. 



St. Elena, South America, and Guacomayo, Central America ; 

 in sandy mud, at six to nine fathoms. Cuming. 



69. Tapes fusco-lineata (pi. cH. f. 145), Sowerhy (Venus), 

 Zool. Proc. 1835, p. 41. 



T. testa T. discordi simili, sed fusco angulatim lineata. 



It is not easy to see any difference between this species and 

 T. discors, except in the character of the marking, which is cer- 

 tainly peculiar, and seems to be constant, consisting of beauti- 

 fully arranged angular lines of dark brown. 



Guacomayo, Central America ; in sandy mud, at thirteen fa- 

 tiioms. Cuming. 



