472 



BULLETIN OF THE BUREAU OF FISHERIES. 



Allorchestes littoralis Stimpson. 



Hyale littoralis Smith, Rept. r. S. Fish Com. 1871-72, p. 556. 



Eyes oblong or reniform, their distance apart being less than their shortest diameter; first antenna 1 

 about three-fourths the length of second, the three joints of peduncle of subequal length; flagellum a 

 little longer than peduncle and composed of 9-13 joints; second antenna' less than half the length of 

 body; last joint of peduncle a little longer than preceding one, the lower side furnished with a large 

 tuft of fine plumose hairs. First gnathopods much alike in the two sexes, third and fourth joints of 

 subequal length, the latter produced distally into a prominent setose angle; fifth joint with posterior 

 lobe oblong, rounded, and thickly setose; hand oblong, widening distally; palm slightly convex and 

 nearly transverse, the posterior angle armed with two short but rather stout spines; posterior margin 

 with a setose convexity a little distal to the middle; finger closely fitting the palm, inner margin with 

 two or three short seta; a single short seta on outer margin near base. Second gnathopods stout 

 in the male; the second joint elongated and concave anteriorly, sparingly furnished with small spines 

 on both margins; third joint about as wide as long; fourth joint about twice the length of preceding 

 and strongly produced below into a pointed lobe; fifth joint with posterior lobe very long and narrow; 

 hand large, roughly oval; palm oblique and evenly convex with two short, stout spines at its posterior 

 extremity; posterior margin with a small setose convexity near the palm; finger much as in the first 

 pair. In the female the second, third, and fourth joints of the second gnathopods resemble those of 

 the male; posterior lobe of fifth joint not nearly so narrow and the hand smaller 

 and more oblong than in the other sex; palm a little more oblique than in first 

 gnathopods, armed with two spines at the posterior end; dactyl with a seta on the 



AUorehestes littoralis. Woods Hole, -Mass. 



outer margin near the base as in the male. First and second uropods with rami subequal to 

 peduncle; first pair with peduncle armed above with two rows of three or four spines each; last spine 

 of inner row enormously developed, about two-thirds the length of rami and pointing backward; each 

 ramus with two spines on upper margin and a cluster at the tip; peduncle of second uropods with a 

 few spines above; rami with two spines on upper margin and a cluster at the pit; peduncle of third 

 uropods very short and stout, with a single stout spine on the upper margin; ramus as long as 

 peduncle hut much narrower; the tip furnished with a , -luster of spines. Telson deeply bilobed. 



Length, 6 mm. 



General color, green to olive brown; antenna' reddish brown; eves black. 



Grand Manan to Long Island Sound. 



Found under rocks rather high up on the beach; in fact, this species shows an approach to a 

 terrestrial habit, as it. can with sonic difficulty walk upright while out of water and hops very readily 

 like the species of the preceding genera. 



Anonyx nugax (Philips). 



Eyes large, dilated below, larger in the male than in the female; first antenna? in the female with 

 secondary flagellum over half the length of primary one; second antennae considerably longer than 

 first; in the male both pairs of antenme longer than in the female and the secondary flagellum of first 



