Pholas callosa, Lamarck, Anira. sans Vert. v. p. 445, 1818. 



Crouch's Cuvier, t. 113. f. 1. 

 Pliolas hians, Pultney, Dorsetshire Catalogue p. 26, 1799. 

 Pholas murieata, DaCosta, Brit. Conch, p. 244, t. 16, f. 2. 



1778. Europe. 



Sub-genus GITOCENTRUM, Tryon. 

 Proc. Philad. Acad., Monog. 76. 



2. D. Campechensis, Gmelin, Syst. Nat. p. 3216, 1790. 



Hanley, Desc. Cat. t. 9, f. 44. Lister, Hist. Conch, t. 432. 

 Pholas oblongata, Say, Jour. Phil. Acad. ii. 320, 1822. 

 Pholas Candeana, D'Orbigny, Moll. Sagra's Cuba, 215, t. 25, 

 f. 18, 19. Southern United States, W. Indies. 



3. D. Chiloensis, King., Zool. Jour. V. 334, 1832. 



Sowerby, Thes. Conch, ii. t. 102, f. 1, 2. Philippi, iii. 1. 1, 

 f. 4, 5. Chenu, Man. ii. f. 14, 15. 

 Pholas laqueata, Sowerby, Proc. Zool. Soc. 1849. Thes. 



Conch, ii. 486, t. 103, f. 19, 20. 

 Dactylina retifer, Morch, Mai. Blatter vii. 177, 1860. 



Perm, Chili. 



Genus MONOTHYRA, Tryon. 

 Proc. Philad. Acad. 1862, Monog. 77. 



1. M, orientalis, Gmelin, Syst. Nat. p. 3216. 



Sowerby, Thes. Conch, ii. 486, t. 102, f. 3, 4. Wood, Gen. 

 Conch, t. 14, f. 1, 2. Bruguiere, Encyc. Meth. t. 168, 

 f. 10. Chemnitz, Conch. Cab. viii. t. 101, f. 860. Han- 

 ley, Desc. Cat. t. 2, f. 20. Lister, Hist. Conch, t. 431, 

 f. 247. Wood, Index Test. t. 2, f. 1. Chenu, Manual, 

 ii. f. 16. 



Pholas Siamensis, Spengler. 



Pholas dactylus, Solander, MSS. teste Gray, Ann. and Mag. 

 Nat. Hist. 2 ser. viii. 382. India. 



Genus XYLOPHAGA, Turton. 

 Conch, dithyra Brit. 253, 1822. 



1. X. cardissa, Gould, Otia Conchologica, 241, 1862. 



Mergive Islands. 



2. X. dorsalis, Turton, Conch, dith. Brit. 253, t. 2, f. 4, 5, 



1822. 

 Chenu, Man. ii. f. 20, 21. Sowerby, t. 108, f. 103, 104. 

 Forbes & Hanley, t. 2, f. 3, 4, and British Authors. 



