354 MEMOIRS OF THE CARNEGIE MUSEUM 



First pereiopods comparatively short, and not very stout, considering the size of 

 the species. Hand short and not very broad, depressed, elongate-ovate, stronger 

 and more elongate in the male than in the female. Surface punctate. Inner mar- 

 gin almost straiglit, with a double row of tul^ercles, which are more or less spiniform. 

 Outer margin smooth, bluntly angular, more distinctly so distally. Fingers dis- 

 tinctly longer than the palm (measured from articular tultercle on upper .side of 

 carpopodite to articular tul)ercle on upper side of palm at liase of movable finger), 

 straight, cutting eilges straight, in contact all along their length, with a few very 

 small tubercles in the proximal part, for the rest without teeth or tubercles, but 

 •with a .short and dense pubescence, becoming slightly barbate proximally on lower 

 side. Upper surface of each finger with a low longitudinal rib, most distinct dis- 

 tally. Lower surface of hand almost smooth, sparsely punctate. 



Carpopodite slightly longer than wide, shorter than palm, punctate. Upper 

 surface with a distinct longitudinal sulcus. Iimer margin with a strong procurved 

 spine in the middle, and a small spine anterior to it. Lower surface with two 

 strong spines, one in the middle of the anterior margin, the other at articulation 

 with hand. Sometimes there are additional small spines or spiniform tubercles, 

 proximal to, or above, the large spine of the inner margin. 



Meropodite smooth, upper margin with two (rarely more, up to four) strong 

 spines at a short distance from the distal end. Lower margin with two rows of 

 strong spines, the inner one consisting of four to ten spines, largest distall}', the 

 outer one of two to three spines. A spine at the outer articulation with the 

 carpopodite. 



IsoMopodite of third pereiopods hooked in the male; hook in the male of the first 

 form strong, subconical. 



Coxopodites of posterior pereiopods without prominent crests or tubercles in the 

 male. 



Fird plcopods of male of the first form (Plate I, Fig. 5a and oh) rather strong and 

 short, not reaching beyond the anterior margin of the coxopodites of the third 

 pereiopods. They are not articulated at the base, straight, and the two jsarts are 

 separated at the tips only for a short distance. Tips crossed (twisted), divergent; 

 that of the inner part is soft, gradually tapering to a point, and is directed obliquely 

 outward ; that of the outer part is horny, gradually tapering to a point, and directed 

 obliquely forward and slightly inward. 



In the male of the second form the first pleopods are articulated at the base 

 when young, but not articulated when old, and both tips are soft ; that of the outer 

 part is rather bluntl}' pointed. 



