300 AMriliI'(tI)A NOUMALIA. 



ha\'ing the peclunclc long and the rami short and flat. Telson 

 single. 



I have retained the name given to this genus by M. -Edwards in 

 consequence of the obscurity of Say's desci'iption, which, however, 

 has priority of djite. 



1. Vibilia Edwardsii, n. sp. (Plate XLIX. fig. 6 ; fig. 7, young.) 



Female. — Eyes long-oval. Superior antenna} very stout ; second and 

 third joints smaller than the first : fiagellum flattened ; upper mar- 

 gin thick, fringed with a row of equidistant, short, flue hairs ; apex 

 obtusely pointed ; anterior margin oblique, fringed with a thick row 

 of short incipient spines (microscopic). Inferior antennae shorter 

 than the superior, having a flagellum consisting of seven articuli 

 — one long, four short, one a little longer, and a minute terminal 

 one. First pair of gnathopoda having the meros inferiorly pro- 

 duced and aiTued with a few subulate spines ; carpus stout, the 

 inferior margin carrying a few serrated subulate spines ; propodos 

 not so robust as the carpus, having the inferior margin furnished 

 with a row of short stiff hairs of equal length ; dactylos short, stout, 

 and serrated upon the inner margin. Second pair of gnathopoda 

 longer than the fii'st, having the meros considerably produced 

 anteriorly below and tipped with a few stiff sen-ated spines ; 

 carpus long, not broader than the meros, inferiorly produced an- 

 teriorly to a sharp point reaching to half the length of the pro- 

 podos, and serrated upon the inner margin ; propodos half the 

 breadth of the carpiLS and serrated along the inferior margin ; 

 dactylos straight, acute, and serrated upon the inner margin. First 

 two pairs of pereiopoda uniform, tolerably robust, much longer 

 than the gnathopoda, having the carpi rather shorter than the 

 mei-a ; propoda longer than the carpi, armed upon the inner 

 margin with distant spinules ; dactyla arcuate, sharp: third 

 and fourth pairs imiform, ha^dng the basa dilated, long-ovate ; 

 mera and car[)i robust, subequal, the latter furnished upon the 

 inner distid angle with two long straight spines and a few short, 

 straight marginal cilia ; propoda nearly as long as the two pre- 

 ceding joints, slender, margins parallel, slightly arcuate, fringed 

 upon the inner margin with minute distant cUia ; dactyla long, 

 pointed, and sHghtly bent : fifth pair not reacliing further than the 

 extremity of the meros of the preceding pair of pereiopoda ; bases 

 scarcely longer than the coxa ; ischium short, meros rather longer, 

 carpus still longer, propodos still more so, and dactylos about the 

 same length as the propodos. Ultimate pair of pleopoda having 



