470 



The width of the head is twice its length. The body integument has 

 reticulate sculpture with hexagonal cells. Antennae I in females consist 

 of a three-segmented peduncle and three-segmented flagellum; antennae 

 II are shorter and five-segmented. Antennae II in males are also five- 

 segmented. 



The 2nd segment of pereopods I and II is markedly broadened dis- 

 tally and has slightly bulged margins; the 4th segment is short and some- 

 what broader than the 3rd; the posterior distal angle of the 5th segment 

 is in the form of a roundish lobe in pereopods I and a pointed projection 

 in pereopods II; the inner margin of the chela and subchela is finely den- 

 ticulate; all the segments are rather densely pubescent, with fine setae. 

 381 The 2nd segment of pereopods V and VI has a distally bulged ante- 

 rior margin and is slightly concave proximally. The 3rd-7th segments of 

 pereopods V are much longer than the 2nd segment. The 4th segment of 

 pereopods VI is linear and somewhat longer than the 5th; the 6th seg- 

 ment is barely less than half the 5th in length and thin; the 5th segment 

 has a finely denticulate anterior margin; the 3rd-7th segments together 

 are always shorter than the 2nd. Pereopods VII have a rather narrow 2nd 

 segment which is 2/3 the length of the distal segments. 



The mutually fused urosomites II and III are twice wider than their 

 length. The endopodites of the uropods are somewhat longer than the 

 exopodites. The basipodite of uropods I is denticulate in the distal part 

 of its anterior margin; the endopodite is equal in length to the basipodite. 

 The basipodite of uropods II and III is half as long as the endopodite; 

 the rami of uropods III reach the tip of the telson. The telson is equal in 

 length to its width at the base and its tip rounded. 



Distribution: The species is known from the Atlantic Ocean (5° N, 

 23° W and 36° S, 8° E), the Mediterranean Sea, and the Pacific Ocean 

 (40° S, 163° E and region of California). 



XVIII. Family LYCAEmAE Claus, 1879 



Crustaceans 5-10 mm long, with a thick and smooth integument. The 

 body is compact. The pereon is more or less bulged. The eyes are large 

 and occupy almost the entire surface of the large head, which is higher 

 than the pereon; the head is equal in length to the first three-five somites 

 of the pereon. Antennae I have a three-segmented flagellum; the basal 

 segment of the flagellum is straight in females and armed with a few 

 apical setae; in males it is larger, strongly bent forward, and its posterior 

 surface is densely pubescent, with hairs. Antennae II are generally absent 

 or rudimentary in females; in males they are long, with a short peduncle, 

 and a flagellum that is folded three times in a zigzag manner. 



The mandibles have a palp in males but not in females. Maxillae I 

 and II are present but rudimentary. 



