/S. I, Smith — Crustaceans of the Atlantic Coast. 117 



The carapax, as seen in a side view, is about as long as the first four 

 free segments, nearly three-fourths as high as long, with the dorsal 

 margin approximately parallel with the posterior part of the lateral 

 margins. Both the anterior and posterior portions of the lateral 

 margin are nearly straight, but the anterior portion is directed up- 

 ward at an angle very oblique to the posterior portion, from which it 

 is separated by a broadly rounded angle. The anterior portion is 

 obscurely denticulate posteriorly but distinctly, though very minutely, 

 toward the slightly prominent anterior angle. The anterior margin 

 is edentate and scarcely at all emarginate ; below it is straight and 

 nearly perpendicular, but curved considerably forward above, where 

 the dorsal or inner edges of the lateral lobes are turned abruptly 

 upward at nearly a right angle just in front of the median lobe, to 

 form, as it were, a dorso-frontal rostrum. There is a slight approach 

 to this form of the antero-lateral lobes of the carapax in £J. deformis, 

 but in that species the dorsal edges of the lobes are prolonged and 

 sharply upturned to form a slender dorsal horn in front of which the 

 edges of the lobes are on a level with, and parallel to, the dorsum 

 back of the horn ; while in this new species the whole lateral lobes 

 are prolonged upward and terminate in a slightly incurved edge 

 nearly parallel with the posterior margin of the carapax. The ante- 

 rior part of the carapax is in fact much as in some of the species of 

 Lexicon: if the rostrum in L. nasicoides were edentate and more 

 strongly upturned, it would represent very nearly the form of this 

 part of the front in the present species. 



The major iiagellum of the antennula is much shortei- than the 

 terminal segment of the peduncle ; the minor fiagellum falls consider- 

 ably short of the distal end of the first segment of the major fiagel- 

 lum, but is proportionally larger than in E. deformis. The first 

 pereopods are proportionally of abou't the same length as in E. 

 deformis, the carpus reaching to or a little beyond a line with the 

 front, and the segments are relatively of about the same length, but 

 the terminal ones are more slender than in that species. The four 

 posterior pairs of pereopods are distally a little more slender than in 

 E. deformis, but do not diSer essentially in other respects. 



The first five segments of the abdomen increase slightly in length 

 posteriorly and are almost entirely naked, wanting wholly the 

 plumose setae conspicuous beneath the abdomen of E. deformis. The 

 sixth segment is about as broad as long, the posterior maroin evenly 

 arcuated and armed in the middle with six, or sometimes only four 

 conspicuous seta:*. The basal portion of the uropods is stout, scarcely 



