339 



Epimeron III has an acute denticle on the posterior distal angle. The tel- 

 son is somewhat longer than its width at the base and its apex extends 

 to the middle of the basipodite of uropods III. 



Distribution: Known from the Ross Sea. 



Absent in our collections. 



278 3. Genus lulopis Bovallius, 1887 



Bovallius, 1887a: 17; 1889: 116. 



Small crustaceans, 4-8 mm in length. 



The body has a broadened pereon. The surface of the body and 

 pereopods is covered with short thin setae. All the somites are free 

 and somites V-VII resemble transverse rollers. The head is large, round, 

 and without a rostrum. The eyes occupy almost the entire surface of 

 the head. The flagellum of antennae I in females slightly exceeds the 

 length of the three-segmented peduncle. Antennae II in females are two- 

 segmented. The mandibles retain a palp only in males. The maxillipeds 

 have rudimentary, almost imperceptible inner lobes. The coxal plates are 

 free, pereopods I have a poorly developed subchela; pereopods II have 

 a chela. Pereopods III-VII are approximately equal in length. The 5th 

 segment of pereopods III and IV is not broadened distally. 



Type species: lulopis loveni Bovallius, 1887. 



Sexual dimorphism is much more strongly expressed in lulopis than 

 in other genera of the family. In addition to differences in the structure of 

 the antennae and a much broader pereon in females, sexual dimorphism 

 is also evident in the structure of the last three pairs of pereopods; these 

 are modified in sexually mature females for firm attachment to the tissues 

 of the host. Males and young females are probably free-living. 



In general appearance and structure of pereopods I and II, lulopis 

 occupies an intermediate position between Hyperoche and Hyperia. 



The genus includes two species. 



KEY TO SPECIES OF GENUS lULOPIS 



1. Distal margin of 5th segment of pereopods I straightly truncate, not 

 forming protruding lobe. Fifth segment of pereopods I and II, in 

 addition to short thin setae on distal surface, armed with spines along 



posterior margin 2. /. mirabilis Bov. 



— Posterior distal angle of 5th segment of pereopods I produced, form- 

 ing a small lobe. Marginal spines absent on posterior margin of 5th 

 segment of pereopods I and II 1 . /. loveni Bov. 



1. lulopis lovenii Bovallius, 1887 (Fig. 140) 

 Bovallius, 1887a: 17, 1889: 118. 

 Length of sexually mature specimens 4-6 mm. 



