120 DISCOVERY REPORTS 



upward at right-angles to the plane of the carapace ; the lateral margins are also bent upward, so that 

 in dorsal view the rostrum appears to be truncate with the lateral margins straight and meeting the 

 anterior margin in an obtuse angle on each side (Fig. 27 A). Antennalar peduncle short and robust, 

 distal margin of first segment produced at the outer angle; third segment larger than the first and 

 second together; hirsute lobe of the male particularly large with extremely long and dense setae 

 (Fig. 27 B). Antennal scale small, slender, arcuate, only very slightly longer than the peduncle; apex 

 equal in length to the thorn terminating the outer margin ; peduncle nearly twice as wide as the scale 

 and reaching to the middle of the third segment of the antennular peduncle. The scale normally lies 

 obliquely, crossing inward over the penduncle which is directed outward in the normal way ; no spine on 

 the outer distal angle of the sympod (Fig. 27, C). Eyes well developed with normal functioning ocelli, 



Fig. 27. Katerythrops resimora sp.n. A, anterior end of female in dorso-lateral view, x 12; B, left antennule, x 20; C, left 

 antenna, x 20; D, first thoracic appendage with epipod, x 20; E, endopod of second thoracic appendage, x 20; F, enlarged 

 spine from first thoracic endopod; G, endopod of third thoracic appendage, x 20; H, telson and right uropod of female, x 20; 

 J, telson of male, x 30. 



globular and not flattened dorso-ventrally, set widely apart with the wide straight anterior margin of the 

 rostral plate between them; well-developed ocular papilla present on the dorsal surface of the eyestalk. 

 This papilla is relatively larger in the male specimen than in the females; pigment in preserved 

 specimens, a clear golden brown (Fig. 27 A). Labrum large, with rounded anterior margin. First and 

 second thoracic appendages similar to those of Erythrops. First pair more robust and almost as long as 

 the second. Both pairs armed with strong spines which are regularly and strongly spinulose (Fig. 27 D, 

 E, F). Third to the eighth thoracic appendages long and slender; carpus nearly twice as long as the two- 

 segmented propodus; dactylus fused with the nail to form a very long, slender claw. The thoracic 

 endopods in the type species, K. oceanae, are longer and more slender than in this species (Fig. 27 G). 

 Pleopods of the female rudimentary, in the form of simple setose plates ; pleopods of the male, well 

 developed, biramous and normal except for the first pair in which the endopod is reduced to a single 

 segment. Uropods long and slender; exopod bowed outward, twice as long as the telson; endopod 

 slightly shorter, tapering; no spines on the inner margin (Fig. 27 H). Telson small, narrowly tri- 

 angular; equal in length to the last abdominal somite; lateral margins concave, naked, converging to 



