S. I. Smith — GrvMiJbceans of the Atlantic Coast. 1 1 9 



the side of the median lobe of the carapax ; the second extends from 

 the inferior margin a little back of the first to the dorsal line at the 

 back of the median lobe; the third and fourth extend from the infe- 

 rior margin to the dorsal line, the fourth nearly touching the posterior 

 margin above. The minor flagellum of the antennla is only a little 

 longer than the proximal segment of the major flagellum. The car- 

 pus iu the first pair of pereopods reaches very nearly to a line Avith 

 the front of the carapax, and the carpus, propodus and dactylus are 

 sub-equal in length. The second pereopods do not quite reach a line 

 with the front, the dactylus and propodus are about equal in length 

 and together about equal to the length of the carpus, which is very 

 slightly longer than the merus. The rudimentary exopods of the 

 third and fourth pereopods have three or four plumose setae at the 

 tip and several more upon the proximal segment. The basal portion 

 of the uropods is as long as the telson and armed with about ten 

 spines upon the inner margin : the inner ramus is about as lono- as 

 the basal portion ; the first segment is longer than the second and 

 third together and is armed with about sixteen spines on the inner 

 and two or three on the distal part of the outer margin ; the second 

 with four or five spines on the inner margin and one at the distal 

 extremity of the outer ; the third or terminal with two upon the 

 inner margin and three at the tip : the outer ramus is a little shorter 

 than the inner and its two segments are sub-equal in length. The 

 telson is as long as the fifth segment of the abdomen and about twice 

 as long as the sixth segment, and is armed with either two or three 

 spines upon the distal portion of each lateral margin and at the tip 

 with five spines of about the same size as the marginal ones, though 

 the median is a little larger than the others. 



Length 9'"'". 



Smaller, immature females diflfer in having the anteiior pairs of 

 pereopods proportionally shorter than in the adult, and in having 

 fewer spines on the uropods. 



The only male seen is about 8^"^'" long and not fully mature, 

 althovxgh the antennae are as long as the cephalothorax and the 

 exopods of the third and fourth pairs of pereopods are fully developed, 

 but there is no indication whatever of rudimentary pleopods. From 

 this fact it seems probable that the adult male is wholly without 

 pleopods, and that this species represents a genus distinct from 

 Lamjjroiys. 



I have seen only the male just referred to, one female with eggs 

 and a few immature females. Gloucester Harbor!, Massachusetts, 7 



