686 



margine dorsali utrinque excavate, declivi, margine ventrali sub- 

 rotundato. 



Eather oblique in form, tliick and ribbed at the sides ; figure 66, 

 approaching nearest to the figure of Chemnitz, may be considered 

 the representative of this very variable species. 



China. 



24. Tapes laterisulca (pi. cxlviii. f. 67 to 76), Lamarck, 

 (Venus), Anim. sans vert. No. 60. 



T. testa oblique subtrigona sen ovali, varie picta, laevigata, ad 

 latera sulcata, umbonibus tumidis; latere postico elongate, plus 

 minusve truncato ; margine dorsali utrinque excavato, declivi. 



Tliis species is equally variable in form and colouring with 

 T. recens, from which it may perhaps be separated by the prevail- 

 ing breadth and squareness of the hinder portion contrasted with 

 the acumination of T. recens. In both a portion of the hinder 

 part of the shell is smooth, the sulci having the appearance of 

 being as it were rubbed out. 



Philippines. Cuming. 



25. Tapes catenifera, (pi. cxlix. f. 106, 107, 107*), 

 Lamarck, (Venus), Anim. sans vert. No. 70. 



T. "testa ovata, transversim sulcata, albida, radiis quatuor 

 fuscis catenulatis ornata ; ano impresso, subcordato." 



The four chain-like rays marking our principal variety of this 

 shell may serve to identify the species, and the above description 

 is pretty accurate as far as it goes. I may observe that the sulci 

 are a little lost sight of near the ventral margin at the posterior 

 part of the shell. 



Locality unknown. In Mr. Cuming's and other cabinets. 



26. Tapes flammiculata (pi. cxlviii. f. 56-61), Lamarck 

 (Venus), Anim. sans vert. No. 77. Var. Venus hiantina. Lam. 

 No. 32. Venus carneola. Lam. No. 65 ? V. callypiga. Lam. 

 No. 61. (non Born.) 



T. testa oblique subquadrata, tumida, fulva vel aurantia vel 

 alba, varie picta, concentrice undulatim sulcata, radiatim tenuiter 

 striata, postice subtruncata, angulata; margine dorsali declivi, 

 utrinque subexcavato ; margine ventrali subarcuato. 



A very variable, tumid, angular species, with wave-like con- 

 centric ridges. 



Australia. 



