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TERTIARY FAUNA OF FLORIDA ^'^ 



Pa7iopea glycimeris 'Q^2iXi, Ann. Nat. Hist., viii., p. 562, pi. 50, 51, 1835. 



Panopaa arctica Hanley, III. Cat. Rec. Sh., p. 18, pi. 10, fig. 43. 



Panopaa nof-uegica var. nana, Sby., Min. Conch., vii., p. i, pi. 610, fig. 2, and 61 r, 



figs. I, 2, 1829. 

 Panopcea Middcnchn-ffii h. Adams, P. Z. S., 1854, p. 137 ; yfc/t- Woodward, P. Z. S., 1S55, 



p. 221 ; Reeve, Conch. Icon., xix., pi. vi., fig. 8, 1873. 



Pliocene of Italy and France ; Pleistocene of the boreal North Atlantic 

 and Pacific coasts; recent in the Arctic and boreal seas of both hemispheres, 

 on the Pacific south to the Aleutians, and on the Atlantic in cold, deep water 

 to the Mediterranean. 



Panomya ampla Dall. 

 Panopcea norvugica Midd. (pars), Mai. Ross., iii., p. 78, pi. .xx., fig. 11, 1S49 ; not of 

 Spengler. 



Pleistocene of the North Pacific, Bering, and Okhotsk Seas, and recent 

 in the same region. 



This differs from P. norvcgica by its much more heavy and rude shell, 

 with a more expanded posterior region, and flatter, more irregular valves. 



Genus SAXIOAVA Fleuriau de Bellevue. 

 Hiah-lla Daudin, in Bosc, Conchyl., iii;, p. 120, 1802 ; Roissy, Man., vi., p. 385, 1805 ; 



Lam., Hist. An. s. Vert., vi., p. 29, 1819 ; Gray, List of Brit. Moll., Brit. Miis., p. 88, 



1851. 

 Saxicava Fleuriau, Bull. Soc. Philom., No. 62, pp. 5, 10, 1802 ; Lam., An. s. Vert., v., 



p. 501, 1818. 



Shell small, irregular, very inequilateral, the young with a cardinal toolh 

 like Panomya, the adult with the teeth obsolete; pallial line discontinuous, 

 siphons naked, slightly separated at the tips and in no^rmal specimens com- 

 pletely retractile, shell burrowing, or nestling in gravel or broken shell, or 

 perforating rocks, corallines, or dead shells like pholads. Type, Rlya arctica 

 Linne. 



It is unnecessary to repeat the formidable list of generic and specific 

 synonymes which the curious may find in Gray's List of British Animals, vii., 

 Mollusca, pp. 87-89, 1 85 1. In this synonymy, which Dr. Gray separates into 

 two parts, allotting Saxicava to 5. rugosa and Hiatella to 5. arctica (which is 

 the young of mgosd), he cites a rare memoir of Daudin's for the genus Hiatella 

 dating two years before the proposal of Saxicava by Fleuriau. Bosc and 

 Roissy do not refer to this memoir, but mention two species from Tranquebar 



