695 



56. Tapes jsubstriata (pi. cl. f. 116, 117), Montagu 

 (Venus), Test. Brit. Suppl. p. 48. pi. 29. f. 6. 



T. testa subquadrata, parva, sinuata, alba, striis tenuissimis 

 concentricis et costellis minutis eequalibus decussata ; latere au- 

 tico brevissimo, umbonibus subterminalibus ; margiue dorsali 

 recto, ascendente ; latere postico truncato. 



Of a square form, white, and of irregular growth, decussated 

 with very minute concentric and rather more distinct raised and 

 equal radiating striae ; the square form results from the terminal 

 position of the umboes, the straight dorsal edge, and the trun- 

 cated hinder side of the shell. It has been passed over as a 

 variety of T. decussata of confined growth, but the equality of 

 the sculpture as well as the form forbid my adopting the same 

 conclusion. 



Great Britain. 



57. Tapes Lajonkar.ii (pi. cl. f. 120), Payr. (Venus), Cat. 

 Cor. pi. 10. f. 11, 12. 



T. testa T. sinuosa simili, sed striis majoribus, medio subde- 

 presso, inargine dorsali haud tantum elevato. 



I am doubtful about the characters of this species as distin- 

 guishing it from T. sinuosa ; but having seen a number of speci- 

 mens of both, and finding the slight differences well preserved in 

 all, I venture to admit them. They are, the depression in the 

 middle of the shell, the less elevation of the dorsal margin, and 

 the coarser character of the sculpture in T. Lajonkarii, which is 

 also usually coloured with yellowish-brown. 



Corsica. 



58. Tapes subquadrata (pi. cl. f. 119), Sowerby,jun. 



T. testa pallide fulva, parva, compressa, subquadrata, rniuutis- 

 sime radiatim et concentrice striata, antice brevi, subrotutidata, 

 postice subquadrata. 



This little shell is flatter, more regular, and less square than T. 

 sinuosa; it has a slight depression in the middle of the shell from 

 the apex. The umboes are not so nearly terminal. 



Locality unknown. In Mr. llanley's collection. 



On re-examination I am inclined to think this only a young 

 specimen of T. Lajonkarii. 



59. Tapes galactites (pi. cli. f. 132), Lamarck (Venus), 

 Anim. sans vert. no. 52. 



4 x 



