12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



LIMOPSIS ONCHODES, new species 



Shell small, narrow, oblique, inflated, the beaks prominent, the inner 

 margins crenulate; area rather large; hinge line short, with four 

 oblique teeth on the shorter side and eight more vertical on the other; 

 sculpture of numerous fine equal radiating threads with equal or nar- 

 rower interspaces; concentric sculpture only of faint incremental 

 ines. Length, 5.0; height, 5.5; diameter, 4; hinge line, 3.5 mm. U. S. 

 Nat. Mus. Cat. No. 108183. 



Off Fernandina, two valves. 



I have been unable to find any recent species closely resembling 



this. 



Genus CUCULLARIA Conrad 



CUCULLARIA SAGRINATA Dall 



Macrodon sagrinata Dall, Bull. Mus. Comp. Zool., vol. 12, No. 6, p. 245, 



September, 1886. 

 Area {Cucullaria) sagrinata Dall, Trans. Wagner Inst., vol. 3, pt. 4, p. 659, 



1898; Proc. U. S. Nat. Mus., vol. 24, No. 1264, p. 508, pi. 31, fig. 2, 



March, 1902. 



Off Fernandina and Georgia; numerous valves. Gulf of Mexico, in 

 80 fathoms, U. S. S. Albatross. 



Genus ARCA Linnaeus 



Subgenus Barbatia (Gray) Adams 



BARBATIA. sp. indet. 



Off Fernandina, three very young valves. 



These, though undoubtedly belonging to Barhatia, are too young to 

 determine the species. 



Subgenus Bathyarca Kobelt 



BATHYARCA ORBICULATA Dall 



Bathyarca pectunculoides , var. orbiculata Dall, Bull. Mus. Comp. Zool., vol. 

 9, p. 121; vol. 12, No. 6, p. 240, pi. 8, fig. 5, 1886. 



Off Georgia and Fernandina. Gulf of Mexico, at Blake Station 33, 

 in 1,568 fathoms. 



BATHYARCA INAEQUALIS, new species 



Shell minute, white, translucent, very inequilateral, the anterior end 

 short, attenuated, rounded, the posterior longer, widely expanded, 

 rounded; beaks prominent, small; area nearly linear, hinge line with 

 three very oblique teeth at each end separated by a long edentulous 

 space; inner margins smooth; sculpture very faintly cancellate by 

 incremental and radial striae, more evident toward the ends and basal 



