441 



Naturally, in larger crustaceans all the structural details appear coarser 

 than in smaller ones. The absence of sympatry in the distribution of 

 the above two species (even in the narrow Californian region they 

 are allopatric) also does not preclude the suggestion of the possible 

 subspecific nature of their differences. The ultimate resolution of the 

 status of P. macropa and P. latreillei requires investigations of the 

 character and range of variation of the morphological features in the 

 genus Primno. In. the present key we include P. latreillei in the same 

 form as was described by Bowman. 



Distribution: Found along the Australian coasts, in the region of 

 California, southeastern part of the Gulf of Guinea, eastern part of the 

 Mediterranean Sea, the Red Sea, and in the central part of the Atlantic. 

 Possibly the distribution is circumtropical. 



SUPERFAMILY LYCAEOPSOIDEA CHEVREUX, 1913 



Antennae I originate from the frontal part of the head and are short and 

 few-segmented in both sexes; in males the distal segments of the flag- 

 ellum apically articulate with the broadened basal segment. Antennae II 

 originate from the ventral part of the head and are short and curved in 

 males; they are absent in females. The pereopods are not armed with 

 chelae or subchelae. The telson is free. 



XV. Family LYCAEOPSIDAE Chevreux, 1913 



The body is well proportioned and weakly curved ventrally. 



Antennae I in males have four-segmented flagellum, the distal 

 segments of which articulate subterminally with the basal segment; in 

 females the flagellum is short. Antennae II are present only in males; they 

 are short, curved, and five-segmented. The mandibular palp is present 

 358 only In males. Pereopods I and II are simple. The 4th-6th segments of 

 pereopods V are very thin and long, in males with highly broadened 2nd 

 and 4th segments while in females the 4th segment is normal. The 2nd 

 segment of pereopods VII is narrow or oval and its distal segments are 

 not reduced. 



The rami of all uropods are free; the telson is not fused with the last 

 urosomite. 



The family includes one genus. 



1. Genus Lycaeopsis Claus, 1879 



Claus, 1879b: 41; 1887: 66; Bovallius, 1887: 29; Stebbing, 1889: 1458; 

 Chevreux, 1913: 17; Chevreux and Page, 1925: 417; Spandl, 1924: 27; 



