726 



This beautifully foliated Venus has the lamina; deeply striated 

 on the under side, irregularly fringed at the edge, and coiled over ; 

 at the back they are angulated, and produced into two hollow 

 lobes. The crenulation of the margin is almost imperceptible. 



New Holland. 



68. Venus Yatei (pi. civ. f. 68), Gray, Yates, New Zealand. 



V. testa ovali-subcordata, pallide fulva, postice subquadrata, an- 

 gulata, antice brevi ; laminis concentricis tenuibus, angulatim la- 

 queatis, medio et prope umbones subobsoletis ; margine dorsali 

 lammatim striato, piano ; lunula impressti ; margine ventrali intus 

 minute crenulato. 



Of a more oblong oval than Y.plicata, with an obtuse angle 

 and quadrate form at the back. The concentric laininse are more 

 produced at the sides, particularly at the back of the shell, and 

 angularly fluted. 



New Zealand. 



69. Venus casina (pi. clx. f. 177-180), Linn. Syst. Nat. 

 p. 1130. Pectunculus membranaceus, Da Costa. Yenus reflexa, 

 Montague. Yenus lactea, Donovan. Venus discina, Lamarck. 

 Test.jun. Venus Rusteruccii, Pagraudeau. 



Y. testa rotundata, solida, postice subtruncata, pallide fulva, 

 immaculata vel maculis fuscis suffusis radiatim picta, radiatim 

 minutissime striata, concentrice rugoso-lamellata ; laminis reflexis, 

 crassis, hiEequalibus, postice magis extantibus; margine dorsali 

 planulatim subexcavato, paululum arcuato ; lunula striata, impres- 

 sa; margine ventrali intus crenulato. 



The laminae are very irregular, closely reflected and thickened 

 the greater part of their length, but more open at the back of the 

 shell, which is more distinctly truncated. The species also varies 

 from being nearly flat, to attaining a thickness almost equal to 

 its length. 



British, Scandinavian, and Mediterranean seas. The specimens 

 fig. 178, 180 are from Senegal. 



70. Yenus rosalina (pi. clx. f. 181), Rang, Hanley, Sp. of 

 Shells, App. Wood's Index, Suppl. pi. 15. f. 56. 



Y. testa, ovali-subcordata, solida, pallide fulva, fusco irregulariter 

 subradiatim maculata, concentrice costellata, ; costellis rotundatis, 

 crebris, ad latera subundulatim interruptis, postice raro in lobum 



