132 



propodos ; with these exceptions the secoud i)air is similar to the first. 

 First and second pairs of thoracic feet longer than the third ; the first 

 pair longer than the second ; the external surface of the coxae ridged 

 along the middle, with posterior angles acute, spinous ; all the joints nar- 

 row and elongate ; claw auchylosed with the tarsus, and fixed at a right 

 angle to it; the apex of the tarsus produced in the form of a long, 

 straight, acute spine. The third pair of thoracic feet enlarged, more 

 robust than the others, with coxa ridged on the middle of the external 

 surface, and with the anterior and posterior margins armed with short, 

 stout spines ; meros slender, convex posteriorly, and anteriorly concave ; 

 anterior surfaces of the carpus and meros armed with long, sharp teeth — 

 three on the latter, and seven on the former; the fifth tooth, counting 

 from the base oft he carpus, much larger and longer than the others ; 

 carpus somewhat clavate in shape, the anterior extremity enlarged ; 

 propodus about half the length of the carpus, arched; dactjlus small, 

 auchylosed, fixed at a right angle to the propodos. Fourth and fifth 

 pairs of feet sub-equal, shorter than the preceding, with the anterior 

 angles of coxse spinous ; in other respects similar to the preceding. 



Abdomen narrow; the three anterior segments gradually diminishing 

 in length posteriorly ; the fourth very narrow. The peduncles of the 

 anterior appendages broadly oval ; the rami short and slender, multi- 

 articulate; the posterior appendages slender, lanceolate, biramous, 

 acute; the outer pair extending half way the rami of the terminal pair; 

 the inner pair short, terminating at the commencement of the rami ot 

 the outer pair. Telson minute, rudimentary. 



Length, .40 of an inch. 



Locality: North Pacific Ocean. Latitude 34^ north ; longitude 150° 

 west. Collected June 25, 1873. 



PHROSININ^. 

 ANCHYLOMERA THYROPODA, Da7ia. 



Anchylomera iliyropoda, Dana, U. S. Expl. Exped. Crust., ii, 1004, pi. 68, f. 10.— Sp. Bate, 

 Cat, Amphi. Crust,, 325, pi. lii, f. 6. 



Locality: iJ^orth Pacific Ocean. 



1 identify this species with Dana's, which came from the Atlantic 

 Ocean, on account of the peculiar form of the antennae. These organs 

 are curved downward and outward, and are closely applied to the sur- 

 face of the head. In one specimen the antennae were absent altogether ; 



