234 Miscellaneous. 



it agrees with NepJirops and differs from Homarus and Nephropsis 

 in having slender and carinated chelae. 



Eunephrojjs Bairdii, sp. no v. 



Female. — The carapax is nearly as hroad as high, and the bran- 

 chial regions and the dorsum, except in front, are evenly convex 

 and rounded. The cervical suture is conspicuous and very deep, 

 extends round beneath the narrow lateral lobe of the gastric region, 

 and joins the middle of a conspicuous regularly semicircular suture, 

 limiting the hepatic region below and behind. The inferior edge 

 of the rostrum is sharp and slightly roughened, but not distinctly 

 dentate. From the sides of the rostrum two low rounded carinae 

 extend back a little way upon the gastric region, and are armed 

 each with two spines somewhat smaller than the lateral spines of 

 the rostrum, while much further back, upon the posterior margin of 

 the cervical suture, there is a pair of similar subdorsal spines much 

 nearer together. The anterior margin projects on either side in a great 

 vertically compressed dentiform spine, reaching in an acute point as 

 far forward as the eyes, and recalling similar spines in some of the 

 Crangonidse. Just behind the base of the antennal spine there is a 

 small spine on the hejjatic region, and between this and the poste- 

 rior subdorsal spine of the gastric region, and behind the orbit, 

 there is a similar spine. The carapax is everywhere roughened with 

 minute tubercles, between which the surface is beset with very short 

 hairs. 



The eyes, though not quite so large, are nearly like those of 

 Nephrops norvegicus, being vertically compressed, reniform, and 

 black. 



The antennulse are like those of Nephrops norvegicus. The 

 general form and proportions of the bodies of the segments of the 

 peduncle of the antennae are almost exactly as in Nephrops norve- 

 gicus, but the second segment is evenly convex externally and with- 

 out any trace of a tooth or spine at the base of the very small 

 antennal scale, which is very little more than half as long as the 

 fourth segment, about half as wide as long, oblong-ovate, with a 

 minute tooth at the tip, and with the inner edge ciliated. The 

 flagellum is considerably longer than the body of the animal, and 

 very nearly as in Nephrops norvegicus. 



The oral appendages agree very closely in every detail with those 

 of Nephrops norvegicus, except that there is a well-developed podo- 

 branchia, fully as large as in Homarus americanus, at the base of 

 the first gnathopod. 



In the single specimen seen the right cheliped is in process of 

 reproduction and very rudimentary. The left cheliped agrees in 

 general form very closely with the more slender of the chelipeds of 

 Nephrops norvegicus ; the inferior and superior edges of the merus, 

 though roughened with somewhat spiniform granules, bear only one 

 real spine each, and that at the distal end ; the spines of the carpus 

 are slightly fewer, but arranged nearly as in Nephrops norvegicus ; 



