194 



the cervical, which is indistinct : rostrum short, triangular. The abdominal 

 terga behind the 1st are of approximately the same length, and the abdominal 

 pleura behind the 1st are well developed : the telson is square cut and the exopod- 

 ite of the tail-fan is not divided by any suture, both the caudal swimmerets 

 being broad. 



Eyestalks very short : eyes very pale or quite undistinguishable. Two 

 antennular flagella, which are about as long as the carapace. 



There is a spiniform antennal scale of good length, and inside it the outer 

 angle of the 2nd joint of the antennal peduncle forms an equally conspicuous 

 spine. 



The 2nd maxillae consist of well-developed and deeply-cleft coxopodite and 

 basipodite, a tapering endopodite and a normal scaphognathite, exactly as in 

 Nephrons, &c. 



All the maxillipeds are furnished with exopodites and foliaceous epipodites : 

 in the 1st pair the exopodite is short and foliaceous, in the 2nd pair it is flagelli- 

 form and longer than the endopodite, and in the 3rd pair it is slender and 

 tapering but has no terminal flagellum : in the 1st pair the endopodite is folia- 

 ceous, in the 2nd and 3rd pair it is strictly pediform, being 7-jointed in the 3rd 

 pair. The first 4 pairs of thoracic legs are furnished with large epipodites. 



The thoracic legs of the 1st pair which are chelate, are very massive, and 

 are a little unequal : the hand, which forms the greater part of their bulk, is 

 compressed both as to the palm and as to the fingers, the fingers being hardly 

 as long as the palm : the carpus is a short, deep, compressed joint. 



The 2nd-5th legs are slender and are much shorter than the 1st : the 2nd 

 pair are minutely but perfectly chelate, the others end in a short dactylus. 



In the female the abdominal somites, from the 2nd to the 5th, bear biramous 

 narrowly-foliaceous appendages; but in the male the appendages of the 1st 

 somite are uniramous and slender organs of copulation : in the female they are 

 slender and uniramous. 



The eggs are few and of very large size. 



The branchial formula is as follows : — 



ep. 



