OF NORTHUMBERLAND AND DURHAM. 85 



2. V. OASINA, Linn, 



Verms casina, Mont. Test. Brit. Supp. 47. 

 From deep water, rather rare. " Holy Island." — 3fr. Winch. 

 Newton. — 3fr. R. Embleton. Whitburn. — Rev. G. G. Abbes. 

 " Seaton, W. C. Trevelyan, ^sq."— Hogg's Nat. Hist, of Stockton. 



3. V. FAsciATA, Da Gosta. 



Venus paphia, Mont. Test. Brit. 110. 

 In deep water^ rather rare. 



4. V. GALLiNA, Linn. 



Venus striatula, Mont. Test. Brit. 113. 



Var, 1. Without rays, ridges sharper and closer. 

 Venus rugosa, Penn. Brit. Zool. iv. 95, t. 5Q, f. 50. 



Var. 2. Shell more compressed, and produced transversely ; 

 striae sharp and distant. 



Venus Prideauxiana, Leach, Macg. Moll. Aberd. 266, 

 This species is subject to very great varieties. The normal 

 form, Venus galUna of authors, is plentiful on some of our sandy 

 shores, living at a little distance below low-water mark. The 

 first variety, Venus rugosa of Pennant, and perhaps also V. lami- 

 nosa of Laskey and Montagu, is very rare on our coast and its 

 habitat unknown to us. The second variety, V. Prideauxiana') 

 Leach, is always found in deep water, and is not uncommon ; 

 sometimes plain, but generally with about three brown rays. 

 The plain kind appears to be the V. laminosa of Turton's " Bri- 

 tish Bivalves," and his V. pallida looks like a variety of the 

 littoral form with the ridges obsolete. The V. costata of Brown 

 (Illust. Rec. Conch. 90, t. 36, f 13), "found at Seaton, Nor- 

 thumberland," we take to be a short variety of the deep-water 

 form. 



5. V. OVATA, Penn. 



Venus ovata, Mont. Test. Brit. 120. 



From deep water, rather rare. 



Venu^ triangularis of Mr. Hogg's list is more likely Astarte 

 compressa. There is also a Venus triangulus, Brown, MSS., in 

 the same list, with which we are unacquainted. Mr. W. Back- 

 house has suggested to us that the Venus chione of Sir C. Sharp's 

 " History of Hartlepool," may be a variety of Gyprina Islandica, 



