DECAPODS 21 



hepatic area backward over the branchial region nearly to the posterior 

 border of the carapace. 



Eyes of moderate size, subglobular on somewhat smaller cylindrical 

 stalks, the corneas of a dark brownish color. 



The flattened antennular spine does not reach the end of the basal 

 segment ; both of the flagella exceed the carapace in length. The second 

 antennae exceed in length the whole body; there is an acute spine on 

 the peduncle below the articulation of the scale ; the scale is long-oval, 

 armed with a spine at the distal end, and overreaches the antennular 

 peduncle by a third of its length. 



The third maxillipeds extend as far forward as the end of the antennal 

 scale. 



The first pair of legs, when extended forward, surpass the third 

 maxillipeds by the length of the dactylus ; the merus is either unarmed, 

 or may have one, two, or even three spines; the basal part of the 

 propodal segment is half again as long as the dactylus. The second 

 pair of legs are longer than the first by about half the length of the 

 fingers, and have longer and more slender chelae ; the second segment 

 is armed with a small spine at the distal end of its inferior margin. The 

 third pair reaches forward a little beyond the proximal end of the chela 

 of the preceding pair ; except for the first two segments, they are thread- 

 like ; all the segments are naked and unarmed ; the merus is about one 

 half the length of the whole appendage, and more than twice as long as 

 the propodus. The fourth pair of legs reaches scarcely to the middle 

 of the merus of the second pair; the lower margin of the dactylus, 

 propodus, and distal half of the carpus is fringed with bristles. The 

 fifth pair, when extended, reach to the middle of the merus of the 

 second pair ; the dactylus is elongate-oval, the margin of its distal half 

 fringed with long setae. 



The second to sixth abdominal segments inclusive are carinated on 

 the median line. The sixth segment is from two thirds to three fourths 

 longer than the fifth; it is marked on either side by a 

 curved longitudinal ridge. Telson four fifths as long 

 as sixth segment ; dorsal surface channeled ; extremity *> 

 with a deep notch, bordered by spinules, which in- station 3455. 

 crease in size and are continued to the posterior outer angle of each 

 lobe ; the outer spinule is considerably longer than the others and is 

 very often broken off. 



Dimensions. Length of female, 64.8 mm. ; length of carapace, 20.3 

 mm. 



Distribution. This species occurs sparingly from Unalaska and the 



