7^6 



This beautifully foliated Venus has the laminae 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), 6rray, Yates, New Zealand. 



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

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

 queatis, medio et prope umbones subobsoletis ; margiue dorsali 

 laminatim striato, piano ; lunula impressa ; margiue ventrali intus 

 minute crenulato. 



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

 and quadrate form at the back. The concentric lamina3 are more 

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

 angidarly fluted. 



New Zealand. 



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

 p. 1130. Pectunculus raembranaceus, Ba Costa. Venus reflexa, 

 Montague. Venus lactea, Donovan. Venus disciua, Lamarcl'. 

 Test.jun. Venus Eusteruccii, Fayraudeau. 



V. testa rotundata, solida, postice subtruncata, paUide fulva, 

 immaculata vel maculis fuscis suffusis radiatim picta, radiatim 

 minutissime striata, concentrice rugoso-lamellata ; laminis reilexis, 

 crassis, ina3quaUbus, postice magis extantibus; margiue 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 fiat, to attaining a thickness almost equal to 

 its length. 



British, Scandinavian, and Mediterranean seas. The specimens 

 fig. 178, 180 are from Senegal. 



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

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



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

 subradiatim maculata, concentrice costellata ; costellis rotundatis, 

 crebris, ad latera subundulatim interruptis, postice raro in lobum 



