i.i PIDOPLE1 i '{ 



Trims in ( Iray's edition of L.-arh' I/,- - j n 



'. need not he omsidrivd here ai ii \\-.\- no hcarim: upon mmi.-n- 

 rlatun>. In 1868, Mer, II. ami A. Adams, in tli- <, 

 Recent Mn//nwt, adopted llisso's nanir for a I:ir_ r(i li-t 

 mainly of Ttehnochitoni, l>ut inrludinir al 



Lcpfnchitttn, etc., among them L. m/v/. /////.- I'oli. 



priitrr in his later writing used LepidopUufW ! rover tliat '_rroiip 

 of Isrlmorhitons liavini: the girdle clothed with large, .-niooth nm- 

 \ A <caK-s, like those of the typical Chitons. Nothing can ! -aid 

 in tiivor of this use of the name, for Carpenter expressly states that 

 the species cited by Risso are excluded from the group as re-habili- 

 tated! It is, therefore, obvious that Lepidopleurus Cpr. is a totally 

 distinct group from Lepidopleurus Risso. No argument is ne<-di-d 

 to show the untenability of Carpenter's position. In 1880, Cam-, 

 in his Prodromtu Faunce Mediterranean, has used Lepidopleurus as a 

 subgenus under Chiton (which he places in the Ischnoidea ! j, and 

 has included in it species of Trachydermon and Ischnochiton, as 

 well as Leptochiton cajetanus. In 1878 G. O. Sars correctly 

 restricted Lepidopleurus to the genuine Leptochitons. 



L. CANCELLATUS Sowerby. PL 3, figs. 54, 55, 56, 57, 58. 



Shell small, elongated, much elevated, regularly arched, not 

 anirled. Orange-ashen or .whitish. 



Anterior valve radiately, evenly, very finely, granose-1 irate. 



Central areas of the intermediate valves having distinct longitu- 

 dinal, fine, close granulous line, the granules being sometimes 

 arranged in transverse lines also, giving a latticed appearance ; lat- 

 eral areas distinct, decidedly raised, convex, having radiating but 

 rather irregular rows of granules. 



Posterior valve with central elevated apex ; posterior slope con- 

 cave. ' 



Interior white, the sutural plates small, triangular: juiral sinus 

 very broad. 



Girdle narrow, densely beset with delicate, scarcely imbricating 

 or striated, scales (figs. 55, 57). 



Length 5], breadth 2 2 mill.; divergence 80. 



Northern Atlantic and Arctic Seas. Britain ; Norwegian Coast 

 in ">0-100 fms. ; Lofoten Is. 300 fins. ; Greenland: South to Gulf 

 of Lyons, Vigo, Spain (and Dalmatia /). Northern I'lirific. .-1 tnskn, 

 at Unalashka, Shumagins, Port Etches and Sit/:n II<;r/i<>,\ o'-loo t'ms. 



