6 



3. N. Subglobosa, Gray, Ann. and Mag. Nat. Hist. 2 ser., 



viii. 885, 1851. 

 Chenu, Man, ii. f. 28, 29. H. and A. Adams, iii. t. 89, 

 f. 6. California. 



4. N. tenuis, Gray, Ann. and Mag. Nat. Hist. 2 ser. viii. 385, 



1851. ? 



Genus ZIRPHJEA, Leach. 

 H. and A. Adams' Genera, ii. 



1. Z. COnstricta, Sowerby, Zool. Proc. 161, 1849. 



Sowerby, Thes. Conch, ii. t. 104, f. 27, 28. 



Straits of Simda. 



2. Z, crispata, Linn. Syst. Nat. p. 1111. 



Sowerby, Thes. ii. t. 104, f. 37. Forbes & Hanley, t. 4, f. 3, 

 4, 5, and British authors. Bruguiere, Encyc. t. 169, f. 5-7. 

 Chemnitz. Conch. Cab. viii. t. 102, f. 872—874. De 

 Kay, MolL N. Y. t. 32, f. 306. Wood, Gen. Conch, t. 

 15, f. 4, 5. Wood, Index Test. t. 2, f. 5. Adams' 

 Genera, t. 89, f. 5. Chenu, Man. ii. f. 26, 27. Gray, 

 Figs' Moll. Anim. t. 338, f. 5, t. 339, f. 5. 



Pholas bifrons, Da Costa, Brit. Conch. 242, t. 16, f. 4, 1777. 



S'olen crispus, Gmelin, Syst. Nat. p. 3228, 1790. 



Pholas imrva, Da Costa, Brit. Conch. 247, 1777. 



Northern Europe and TJ. S. 



3. Z. Gabbii, Tryon, Proc. Philad. Acad. May, 1873, t. i, f. 1. 



Japan ? California. 



4. Z. Julan, Adanson, Hist. Nat. Senegal, 260, t. 19, f. 1, 

 * 1757. Senegal. 



Sub-family JOUANNETIN>E, Tryon. 



Proc. Philad. Acad. 1862, Monog. 8^ 



Genus PHOLADIDEA, Turton. 

 Conch. Diet. 147, 1819. 



1. P. OVOidea, Gould, Boston Proc. vi. 238, t. 15, f. 1. 



Loiver California. 



2. P. papyracea, Solander, MSS. Turton, Conch, dithyra, 2, 



t. 1, f. 4, 1822. 

 Chenu, Illust. Conch., Pholas, t. 3, f. 1. Mawe, Conch, 

 t. 3, f. 5. Philippi, Neuer Conchy 1., Pholas, t. 2, f. 3. 

 Sowerby, Thes. Conch, ii. t. 106, f. m. H. and A. 

 Adams, iii. t. 90, f. 1. Chenu, Man, ii. f. 30, 31. Reeve, 



