948 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvr. 



ASTARTE SUBiEQUILATERA var. WHITEAVESII Dall. 

 Plate LXII, figs. 7, 12. 



Shell rounded quadrate, plump, inequilateral, the anterior end 

 shorter; concentrically .sculptured with 20 to 25 sharply defined rounded 

 ribs with wider channeled interspaces, the ribs continuous over the whole 

 shell; periostracum thin and papery, of a pale yellowish lu'own; lunule 

 and escutcheon smooth, lanceolate, moderatel}' impressed; inner mar- 

 oins, when adult and at resting stages, crenate, hinge strong, the cardi- 

 nals entire. Height 12, length 14.5, diameter 6.5 nun. 



Type locality, Gaspe, Whiteaves, in 200 fathoms. U.S.N.M., No. 

 95748. 



The continuous ribs behind, more convex vah^es, and smaller size 

 distinguish this variety from the typical sub^quilatera of Sowerby or 

 the lens of Stimpson. 



ASTARTE LIOGONA, new species. 

 Plate LXII, fig. 9. 



Shell small, compressed, rounded trigonal, beaks erect, somewhat 

 eroded in the type, umbonal region (outside of the eroded tract) smooth 

 or marked onh' with incremental lines, but near the base there are 

 indications of live narrow rounded concentric ribs, with wider inter- 

 spaces; periostracum olivaceous, rather dark; lunule lanceolate, moder- 

 ately impressed, smooth; escutcheon narrower and longer; ligament 

 short; hinge moderately strong, the teeth entire, inner margins strongly 

 crenulate. Height 7.0, length 7.5, diameter 4.0 mm. 



Dredged in 118 fathoms, near the delta of the Mississippi, on a 

 muddy bottom. U.S.N.M., No. 64434. 



If this specimen is characteristic it differs from any other known to 

 me in having the umbonal region smooth, while the peripheral portion 

 exhibits raised ribbing. 



ASTARTE VERNICOSA, new species. 



Plate LXIII, fig. 1. 



Astarte ^carhauii (Hancock) Leche, Vega exped., Ill, 1888, pi. xxxii, figs. 7-8 

 (only) 1883. 



Shell small, subcompressed, subtrigonal, subequilateral, covered 

 with a ])rilliantly polished olivaceous ))rown periostracum; l)eaks 

 rather liigh, slightly prosogyrate, the lunule narrow, lanceolate, 

 impressed, the escutcheon similar Imt longer; base arcuate, anterior 

 end rounded, posterior end slightly more produced; hinge delicate, 

 inner margins smooth, hinge teeth nuich as in A. hennettU. Length 

 17.0, height 15.0, diameter 6.7 mm. 



