KONGL. SV. VET. AKADEMIENS HANDLlNGAl?. BAND. 22. N:0 7. ?,\\ 



The urus is about txs long as the last pleonal segment; tlie first ural segment is 

 longer than the last coalesced, which is quite as long as broad. 



The uropoda (1'1. XIII, fig. 43). The Jirst pair do not reach to the apex of the 

 second, and attain the middle of the outer raraus in the last pair; the peduncle is very 

 narrow, linear, and more than six tiraes as long as broad; it is a triHu longer than the 

 inner ramus, which is very narrow and sharp-pointed, and not fully twice as long as the 

 outer; the inner ramus is serrated on the outer margin; the outer raraus is serrated on the 

 inner margin. The second pair reach nearly to the apex of the outer ramus in the last pair; 

 the peduncle is four times as long as broad, and has the lower inner corner projecting 

 and sharp-pointed; it is as long as the inner ramus, which is broader than, and nearly 

 twice as long as, the inner; the rami are serrated as in the first pair. The peduncle of 

 the tliird pair is broader than the preceding, four times as long as broad, with the lower 

 inner corner projecting and sharp-pointed; the inner ramus is about three-fourfhs as long 

 as the peduncle, and nearly twice as long as the outer ramus; both rami are serrated as 

 in the first pair. 



The telson is small, rounded, as long as broad, and not half as long as the last 

 coalesced ural segment; it is narrower than, and scarcely raore than a sixth part as long 

 as, the peduncle of the last pair of uropoda. 



The f e m a 1 e. 



Pl. XII, fig. 46—57. 



The body is considerably broader than in the male, but still compressed and strongly 

 carinated. The head and the pera^on are much longer than the pleon and urus together. 



The jirst and second pairs of antennce (Pl. XII, fig. 47 — 50)') closely resemble those 

 pairs in the female of Eiithemisto Gaudichaudii. 



The peroBon. The first segment is longer than the second, the four following are 

 equal in length, the seventh is a little shorter. 



The perasopoda (Pl. XII, fig. 51 — 56) are similar to those in the male. 



The pleon is about as long as the last four perasonal segments together; the angular 

 projections in the median line of the segments are often less developed than in the male. 



The last coalesced ural segment is a little broader than long. 



The last two pairs of tirojjoda (Pl. XII, fig. 57) are somewhat less elongated than 

 in the male. 



*) Throiigh a change of figiii-es tlie details of the anteiiuoe have got wroug nurabers on the plate and in 

 the explanation, fig. 50 really is the end of the flagollnm in the first pair, and fig. 48 that in the second. 



