b LEPIDOPLEUBUS, 



' Lightning' dred-ini:-, -ays that it differs from the white variety if 

 euf [--ascllus] in its comparatively greater length and more 



raised or arched form, in the less distinct or regular catenation of 

 granules which OOVer the surface, and in the prominence of the 



lateral areas. 



I.. \i.\ r.M.rsSars. PI. 2, figs. 23-' H . 



Shell quite convex, hack equally arched, without trace of a keel 



or defined lateral areas : valve- rather elongate, the posterior larger 



than the anterior valve, half-round, truncated by a straight line in 



t'n.nt: median valves subequal, their posterior margins straight, 



rior margins lightly emarginate in the middle. Entire surface 



1 witli minute ovate tubercles, regularly disposed. (Sars.) 



Length 16 mill. 



North Atl'tntir at Bergen, Lofoten, Finmark, 150-300 fms. ; Bay 



of Jiiwitt, ] i_>n-6fi4 fms. ; Gulf of St. Lawrence betiveen Cape Rosier 



\ 1C. /,// of Anticostild., 220 fms.; St. George's Bank, 



',e, 150finfl, 



dveolm (SARS ms.) LOVEN, Ind. Moll. Lit. Scand. p. L'7, 

 159, 1846. I ii PREYS, P. Z. S. 1882, p. G68.Lepidopleurus alve- 

 olus G. O. SAI:>, Moll. Reg. Arct. Norv. p. 110, t. 7, f. 3 ; t. i, p. 7, 

 ISlS.Leptochitn,, alveolus DALL, Proc. U. S. Nat. Mus. 1878, p. 

 :I17. II A i 'DON, Challenger Rep. vol. xv, p. 12. 



L. i-i.i:;i: \vvrrs Dall. Vn figured. 



Shell elongated, moderately elevated, regularly arcuate, without 

 jugurn. Pale wax.-n, sometimes white. Valves wide, without 

 .s. Front and back valves more or less concave; posterior 

 valve without elevated apex. Sculpture as in L. cancellatus, but 

 th- -ninnies larirer, lateral areas less defined. Sutural plates elon- 

 gated. < iirdh- wide, densely beset with delicate scales. (Dull.') 



1 Qgth !_'. breadth 6i mill. 



Near Dominica, West Indies, in 138 fms. 



Lepfoekiiok J,' r<jr<n t at,i$ I)\F.L, 'Blake' l\ep. p. 414, 1889. 



This fine species is nearest the Atlantic L. c<mre/l<itu* Sc.werby, 

 :"il ' Ad. <fe Reeve. It differs from both 



in its concave or excavated, instead of convex, terminal valves, in 

 the absence or obsolete condition of the posterior mucro, in its 

 much larger and inure regular granules, and in the subdeprcsscd 

 appearance also of the {.art of the median valves near the girdle 

 on each side. It is larger than <,,,, //,,/.< all< i smaller than ;'////- 



