394 PROCEEDINGS OF THE NATIONAL MUSEUM. 



NUCULA CARDARA, new 



Shell polished, light olive-green, thin, elongate-oval, with 8 anterior 

 and 18 posterior prominent teeth, the resUifer prominent and largely 

 free from the hingeline, the interior very pearly, the valve-margin 

 smooth, the beaks hardly prominent, situated 5 mm. behind the 

 anterior end of the shell and showing the whitish prodissoconch. 

 Length, 16; height, 11.5; diameter, 8 mm. Cat. No. 265905, U.S.N.M. 



Station 5673, in 1090 fathoms, mud, off San Diego, California. 



This elegant shell has no sculpture except incremental lines which 

 are hardly visible, but toward the margin become strong at intervals, 

 but without regularity. The periostracum near the beaks becomes 

 dark, and in the closed shell suggests Malletia. There is no Imiular 

 boundary aromid the subumbonal depression. 



NUCULA DARELLA, new species. 



Shell small, inflated, sub triangular, the anterior end slightly shorter; 

 periostracum dark olive, the surface smooth except for somewhat 

 irregular, inconspicuous incremental lines, but under a lei^ showing 

 faint close radial striae; lunule large, distmctly hmited by an im- 

 pressed Ime, mesially with a slight pout; about five anterior and eight 

 posterior hmge teeth, the resilifer deep, small, central, not projecting; 

 mner margins of the valves sharply radially grooved ; beaks pointed, 

 showing the prodissoconch plainly. Length, 4; height, 3; diameter, 

 2.7 mm. Cat. No. 111424, U.S.N.M. 



Station 2923, 822 fathoms, off San Diego, Cahfornia. 



NUCULA LINKI, new species. 



Shell small, inflated, smooth, dark olive, very inequilateral, sub- 

 triangular, the anterior end shorter; lunule large, bounded by a famt 

 keel; beaks promment showing the whitish prodissoconch; sLx an- 

 terior and eleven posterior hmge teeth; valve-margm entire; the 

 resilifer small, deeply set, subumbonal, not projectmg. Length, 6; 

 height, 5; diameter, 3.6 mm. Cat. No. 107649, U.S.N.M. 



Station 3034, 24 fathoms, mud ; off Point Fermin, Lower Cahfornia. 



NUCULA QUIRICA, new species. 



Shell small, dark olive inclining to black, pohshed, with rather rude 

 irregular incremental Imes; romided triangular, the anterior end very 

 short; valves inflated with seven anterior and twelve posterior hinge- 

 teeth, the resilifer narrow, elongated, very oblique, almost parallel 

 with the posterior dorsal margm, hardly projectmg; inner margin of 

 the valves entire; beaks prominent showing the prodissoconch, 

 lunule obscure. Length, 8; height, 6; diameter, 3.5 mm. Cat. No. 

 208727, U.S.N.M. 



Chugachik Bay, Cooks Inlet, Alaska, in 60 fathoms, gravelly 

 bottom. 



