^'wox"'J PKOCEEDINUS OF THE NATIONAL MUSEUM. 450 



qualiti«'a. 'I'lic cliissilicufioii was iiiiuh' in iiccordance with the radical 

 r<^visi<>ii of ilin ,ni()U|) iis pioixtscd in I he Itcpofls of II. M. S. VhaHnujcr* 

 iiiid it \v;is (lie, purpose of the (i.mircs (o aiTiiiijic Mie system «4i'iipliic;iIIy 

 as far as could be done, lor the i)tero])ods of those re^ious covered by 

 the Alhatro.sN. 



IMate 11 is devoted to the •••euiis CavoUnia, exceptin}; Figure 8, which 

 outlines in ditferiMit jxtsitions shells of the only <M>ile(l jjteropods taken, 

 specimens of the Canuly Liniacini(he, Ijimiwlna injlala. It has already 

 been sta.t<^d Unit tvv(> live specimens were taken at 880 fathoms, and 

 when preserveil the parts were withdrawn huj^ely into the large opeir 

 ing of the shell. Theses niinutvc empty shells wer«^ present also in the 

 oo7.e examined. Tlu^ otlnM- figures on the plates are drawn with 

 ventral fac<'. upward, the position usually assumed by the living ani 

 nud, so that tlu; dorsal part of (he sliell is beh)w in the side views of 

 oulliui' drawings, l-'igs. 1-7 jjreseid seven of tin*- eight species of the 

 genus (Uivolinht, the snnUI (/lohidosa \ut{ having been obtained by these 

 collections. I'Ngs. 1 ami L' repr«;sen( lhes]K'cies ''with dorsal Ijp thi(;k- 

 ened into a ]»ad.'' That is to say, Ifisitino.sa and (inadridentata. The 

 thickened dorsal lip — in the drawing represented by tln^ heavy line — is 

 in theli\ing animal deeply brown pigment<Ml, and so (contrasts strongly 

 with the liansliic«Mit color of the rest of the shell, l^'ig. 1 represents 

 lrisi»in<)s<(., a from \<'n(ral view, h from side view, and (• from front view. 

 The drawing is incomph^te with respect to the long, posterior spine 

 (not truth tully represented by the dotted lines of the figure), which 

 bears upon its end th(5 endn-yonic sludl, and relatively is very long, as 

 may be seen in llgures of the living specimen. t This (igure does show, 

 however, the relative size of this species, its gniater lateral extent as 

 comi)ared with its dorso- ventral thickness. In the arrangement of its 

 projecting i)oints, the aperture and various proportions of the parts, 

 trispiuosa compares with Inflcxa (1^'ig. 7.), but on a.c<',ount of the thick- 

 ened dorsal lip it stands in the scheme of classilication of the L'hallcnyer 

 li(^[)orts, next to qiuidridcntata. 



Cuml'mia ({luulridrntata is reju'esiMitcMl in h^ig. 2, from a ventral view, 

 /> lateral, and c dorsal view. It is (he smallest representative, of all 

 the species of (his genus in (he (•olle(;tions, is very much rounded, v«'ry 

 compact in shapi^ wi(,h small aper(ur(^, and withou(, any lateral or i)0S- 

 (crior projecdons (,o (he slKill. All the other (!av<dini(he aie without 

 the thickened anteri(U- edg(^ of (he doi'sal lip. Of these longirofitris — 

 l^Mg. (» a ventral ami h lateral view — has adislinguishing feature in the 

 faet (hat the ventral lip j)roJects beyoiid (he dorsal, so that in a the 

 »'\(r«rnM' poin(s in the posterior contour of the shell belong to tin' ven- 

 tral lip alone, since they project beyond the <^dge of the «lorsal lip, 

 which ends at the two small luojections at th(^ hind end of the shell, 

 interior to the other extrenu- tips, ami so ncaicr (he middle lin<'. The 



* Hy I'iuil i'flsfiicci'. Vol. \\ iiiol' t li();s« KcpurtH. 



t Rang tit Souicyet, MoiiomiipiiitdiH I't^ToiJudes, I'uris, 1852. 



