705 



4. Venus costellata (pi. cliii. f. 14), Sowerby, Pro. Zool. 

 Soc. 1835, p. -12. Dosina antiqua, Gray. 



" V. testa obovata, turgida, fuscescente, costis lamellosis reflexis 

 posticis magis cminentibus concentricis ornata, lincis radiantibus 

 imprcssis albis decussata ; impressione eordiforrai antica distincta, 

 marginibus medianis elevatiusculis, intus alba; margine ventrali 

 crenulato." 



Of a more depressed, oval form than others of the same group, 

 the concentric ridges rather obsolete in the centre, close and la- 

 minated at the posterior side, and close and uudulated at the 

 anterior side of the shell. 



Valparaiso, Chili, and Callao, Peru ; in coarse sand, six to fifteen 

 fathoms. Cuming. 



5. Venus Listeri (pi. clii. f. 7, 8, 9), Cray (Dosina) in 

 Analyst, 1838. Eucyc. Meth. pi. 278. f. 2. 



V. testa ovali, subquadrata, ponderosa, sulcis numerosis planu- 

 latis radiantibus ct costellis concentricis numerosis antice crcnu- 

 latis reflexis crassis postice erecto-laminatis laqueatis decussata, 

 pallide fulva, fasco-variegata ; latere postico elongato, postice 

 truncato ; margine dorsali recto, uniplicato ; latere antico brevi ; 

 lunula magna, sutura circumscripta. 



Of an oblong truncated form, with the hinge-line nearly straight 

 (not arched as in V. pzierpera) ; the ridges in both directions are 

 more numerous, and the concentric ones more laminar, than in 

 V. purpurea. The latter character is however sometimes lost, 

 as in the large, probably aged, specimen represented by fig. 8. 

 The figure in the Encyclopaedia is very exact for the type. 



Philippines, Cuming. Australia. 



6. Venus Chemnitzii (pi. clii. f. 6), Ilanley, Sp. of Shells, 

 App. Wood's Suppl. pi. 16. f. 20. 



V. testa V. Listeri simili, sed costellis concentricis ienuibus 

 omnino laminatis acute laqueatis colore fusco angulatim varie- 

 gata. 



Eesembling V. Listeri, excepting in the character of the con- 

 centric ridges, which are thin, laminated throughout, and fluted in 

 the same manner as in the hinder side of the shell in V. lacerata. 

 The brown colour is arranged in beautiful zigzag markings. 



Island of Ticao, Philippines. Cuming. 



