28 



with long fcathered setae, while 4 slender subequal spines exist at the extremity of the outer 

 margin close to one another. The outer uropods, that are hardly shorter, are armed on their 

 outer margin with 10 or 11 spines and just inside the spine at the postenor extremity another 

 occurs, which is 2 or 3-times as long and slightly arched. 



Eye-peduncles short and stout, the dark slate-coloured corneae occupy more than half 

 the length of the peduncle. The antennular peduncle reaches to the distal third of the scapho- 

 cerite. First article enlarged externally along its proximal half and from this enlarged part 

 arises the pointed, spiniform stylocerite, which is just as long as the i st article; this article, 

 which on its proximal half appears almost as wide as it is long, bears, just in front of the eyes, 

 on its upper surface near the far end a spiniform seta, directed upward. Second antennular 

 article half as long as first and as long as thick, 3 rd nearly one and a half as long as 2 nd . 



The scaphocerite, in the ova-bearing female 1,65 mm. long, is 4-times as long as wide, 

 appears widest at the proximal 6 th and hence gradually narrows, terminating in a short spine, 

 0,09 mm. long, x /ih tne length of the scaphocerite; outer margin slightly concave. 



The external maxillipeds much resemble those of Lept. rodusta Stimps., but the terminal 

 joint is a little shorter (Fig. 8 6) in proportion to the penultimate and the longer of the two 

 setae at the far end of the terminal joint is a little longer with regard to the length of this 

 joint. In the ova-bearing female from Stat. 258 the penultimate joint is 0,76 mm. long, the 

 terminal joint 0,54 mm. long and 0,1 mm. broad, the longer seta at the distal end 0,32 mm.; 

 in the youngest male of Lept. roöusta Stimps. from Stat. 313 these numbers are, in the same 

 succession, 0,9 mm., 0,74 mm., 0,135 mm. and 0,33 mm. Like in Lept. robusta Stimps. the 

 exopodite reaches just beyond the far end of the antepenultimate joint. 



The thoracic legs also much resemble those of Lept. rodusta Stimps. 1 ). The measure- 

 ments of the legs of the female from Stat. 261 are the following. Merus of i st pair 5-times as 

 long as wide, lower margin with 3 slender spines, that are half as long as the merus is wide, 

 along the distal half and with some setae. Carpus almost half as long as the merus, twice as 

 long as wide at the distal end, with 5 setae along the lower margin and a spine at the fal- 

 end of it. Chela a little more than 3-times as long as the carpus ; the palm which is a little 

 more than half as long as the fingers and a little more than twice as long as broad, bears a 

 spine at the distal end of the lower margin, on which 4 setae are implanted; 3 or 4 spiniform 

 setae on the dactylus near the base. 



Leg of 2 nd pair (Fig. 8 e) more spiniferous than those of i st , like in Lept. rodusta Stimps. A 

 slender spine at the far end of the lower margin of the basipodite and two similar spiniform setae 

 behind it at equal distances. Upper margin of ischium with several setae, a slender spine and a few 

 setae at the distal extremity; lower margin with a spine in the middle and with another at the 

 proximal third or fifth. Merus one-third shorter than ischium, 3,5 — 3,6-times as long as wide, 

 lower margin with a spine near the proximal and another near the distal extremity, also one 

 in the middle and with some setae between them ; upper margin also setiferous. Carpus a little 

 longer than one-third of the merus and in the middle a little wider than half the length ; lower 



1) In the diagnosis of Lept. pugnax (1. c. 1916, p. 149) the peraeopods are erroneously said to be of a more slender form. 



