NATURAL SCIENCES OP PHILADELPHIA. 215 



Jay, Cat. 4th edit. p. 9. Sowerby, Monog. Pholas, Thes. Conch, ii. 

 p. 491, t. 102, f. 5, 6, 7. 

 Parapholas Californica, Conrad, Proc. Acad. Nat. Sc. p. 121, 1848. Con- 

 rad, Journ. Acad. Nat. Sc. 2d ser. i, p. p. 214, and ii. p. 335. Carpen- 

 ter, Zool. Proc. p. 209, 1856. Carpenter, Rep. on W. Coast Molhisca. 

 Carpenter, Check-List W. Coast Shells. 



Pholas Janel/i, Deshayes, Proc. Zool. p. 357, 1839. Deshayes, Guerin's 

 Mag. Zool. t. 14, 15, 16, 1840. Catlow, Conch. Nomenc. p. 3. Chenu, 

 111. Conch. Pholas, t. 3. f. 5. 



Parapholas Janelli, H. and A. Adams, Genera, ii. p. 330. Chenu, Man. 

 Conch, ii. f. 41, 42. Fischer, Journ. Conch. 2d ser. iii. p. 52. 

 Martesia Californica, Chenu, Mon. Conch, ii. f. 53. 



Hab. California. 



Coll. Acad. Nat. Sciences. Coll. J. C. Jay, M. D. Coll. G. W. Tryon, Jr. 



P. quadrizonalis, Spengler. (Sp.) 



Pholas quadrizonalis (young shell), Spengler. Sowerby, Monog. Pholas, 

 Thes. Conch, ii. p. 492, t. 108, f. 88, 89. 



Parapholas quadrizonalis, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. 



II. and A. Adams, Genera, iii. t. 90, f. 4, 4a. Fischer, Journ. Conch. 



2d ser. iii. p. 52. 

 Pholas Incii (adult), Sowerby, Zool. Proc. 1849. Sowerby, Monog. Pholas, 



Thes. Conch, ii. p. 491, t. 105, f. 45, 46. 

 Hab. Torres' Straits. 



Genus Penitella, Valenciennes. 

 Penitella, Valenciennes, Voy. Venus, atlas, t. 24, (no description), (part.) 

 Journ. Conrad, Acad. Nat. Sc. 2d ser. ii. p. 335. 

 Parapholas (part.), Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. Carpen- 

 ter, Zool. Proc. 1856. 

 Pholadidea (part.), Carpenter, Rep. on W. Coast Mollusca and Check-List. 

 I cannot find that the text of the Mollusca of Voy. Venus was published, 

 but the figure and the name printed on the plate sufficiently indicate the 

 genus. The three other species of Valenciennes I am unable to make out. 

 No. 2 resembles Martesia striata. No. 4 is a very young shell. 



P. pen it a, Conrad. (Sp.) 



Pholas p e n i t a, Conrad, Journ. Acad. Nat. Sc. vii. p. 237, t. 18, f. 7. Jay, 

 Cat. 4th edit. p. 10. 



Parapholas penita, Carpenter, Zool. Proc. p. 210, 1856. Carpenter, Rep. 

 on West Coast Mollusca. 



Pholadidea penita, Carpenter, Check-List W. Coast Shells. Carpenter, Rep. 

 on W. Coast Mollusca. 

 Pholas concamerata, Deshayes, Rev. Zool. p. 357, 1839. Deshayes, 

 Guerin's Mag. Zool. t. 17, 1840. Chenu, 111. Conchyl. Pholas, t. 3, 

 f. 4. Sowerby, Monog. Pholas, Thes. Conch, ii. p. 497, 1. 106, f. 67, 68. 

 ' Parapholas concamerata, Chenu, Man. ii. f. 43, 44. Fischer, Journ. Conch. 

 2d ser. iii. p. 52. H. and A. Adams, Genera, ii. p. 330. Gray, Ann. 

 and Mag. N. H. 2d ser. viii. p. 383. 



Pholas cucullata, Gray, Syn. Br. Mus. 1840. 



Penitella Conracli, Valenciennes, Voy. Venus, atlas, t. 24, f. 1. Conrad, 



Journ. Acad. Nat. Sc. 2d ser. ii. p. 335. 

 Pholas Darwinii, Sowerby, Monog. Pholas, Thes. Conch, ii. p. 490, t. 107, f. 



76, 77. 

 Zirfcea? Darwinii, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385. 



1862.] 



