886 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



ligament distinct, small; anterior tootli prominent, arcnate, posterior 

 low, small, obliqne; surface microscopically sagriuate and with faint 

 incremental lines. Lon. G.5, alt. 3.75, diam. 2.") mm. 



Fresli valves were dredged in 18 to 22 fathoms, sand, off Cape Fear 

 and Cape Lookout, ISTorth Carolina, bottom temperature 78° F., by the 

 U. S. Fish Commission. 



ERYCINA LINELLA Dall, 



Erycina linella, new species. 

 (Plate LXXXVIII, fig. 7.) 



A. 9. Shell transparent, glassy, small, extremely thin, compressed; 

 beak very low, anterior end somewhat shorter, rounded, posterior dorsal 

 margin and end continuously arched, base evenly convexly arcuate; 

 surface polished, microscopically sagrinate, but otherwise smooth ; ante- 

 rior right dental lamella long, narrow, with a short hook nearly parallel ; 

 pit for tlie resilium shallow, posterior lamella longer than the anterior, 

 but only raised distally ; adductor scars long and narrow, hardly differ 

 eutiated from the rather wide pallial line. Lon. 4,G, alt. 3.G, diam. 

 1.5 mm. 



One right valve was dredged in 31 fathoms, sand, bottom temperature 

 74° F., by the U. S. Fish Commission. 



ERYCINA EMMONSI Dall. 



Erycina emmonsi, new .species. 



(Plate LXXXVIII, fig. 1.) 



A, 10. Shell small, compressed, elongate, white or translucent, nearly 

 equilateral, the anterior side slightly longer; dorsal and ventral mar- 

 gins nearly parallel, the anterior end bluntly rounded, the posterior 

 end narrower and more oblique above, rounded near the base; surface 

 concentrically and somewhat irregularly scnli)tured by the incremental 

 lines, more or less polished; beak inconspicuous, dental lamelh^ low, 

 elongate, the ''hook" small but distinct; adductor scars high up and 

 rather narrow; pallial scar linear, rather distant from the margin. 

 Lon. 9, alt. 5, diam. 3 mm. 



Off" Frying Pan Shoals in 12 fathoms, Dr. Rush; off' Cape Lookout, 

 North Carolina, in 22-31 fathoms, sand, U. S. Fisli Commission. 



This species appears to be the recent representative of the Miocene 

 E. l-nrtzii Dall, but is a more delicate shell and without the sharp radial 

 sculpture of that species, 



ERYCINA PERISCOPIANA Dall. 



Erycina periscopiana, new species. 



(Plate LXXXVIII, fig. 3.) 



A. 11. Shell small, pellucid, subquadrate, with the ends bluntly 

 rounded and the dorsal and ventral margins nearly parallel; beaks 



