6 



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



viii. o85, 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 ZIUPH^A, 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 Sunda. 



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. 



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



Solen crisjms, Gmelin, Syst. Nat. p. 3228, 1790. 



JPJioIas 'parva, 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. 84. 



Genus PHOLADIDEA, Turton. 

 Conch. Diet. 147, 1819. 



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



Lower California. 



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



t. 1, f. 4, 1822. 

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

 t. 3, f. 5. Philippi, Neuer Conchyl., Fholas, t. 2, f. 3. 

 Sowerby, Thes. Conch, ii. t. 106, f. 66. H. and A. 

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



