155 



Maxillae I have a broad inner and a weakly armed outer lobe. The 

 outer lobe of maxillae II is shorter and narrower than the inner lobe. 

 The broadly oval outer lobes of the maxillipeds are armed with a few 



132 setae on the truncated distal margin; the narrowly conical inner lobes are 

 longer than half the length of the outer lobe and bear one strong apical 

 seta. 



The oval-conical 6th segment of pereopods I and II is slightly longer 

 than the 5th; the claws are thin, almost straight. Pereopods III and IV are 

 longer than the preceding pairs, their 4th segment is slightly shorter than 

 or equal to the 5 th and narrower 6th segment. Pereopods V are the same 

 length as pereopods IV; the 5th segment is slightly broadened distally 

 and much longer than the oblong-oval 6th segment. Pereopods VI are 

 longer than all the preceding pairs; the 4th segment is 1.5 times longer 

 than the 5th or the 6th segment, which is nearly equal to the latter. 

 Pereopods VII are shorter than pereopods VI; the 4th and 5th segments 

 are equal, the 6th slightly shorter. The 6th segment of pereopods III -VII 

 has a spoon-shaped formation (poorly discernible in pereopods III and 

 IV ) and small curved retractile claw. 



The basipodites of uropods I and II have a bulging anterior mar- 

 gin and are densely pubescent with numerous setae; the rami are long, 

 narrowly lanceolate.The telson is roundish-triangular and does not reach 

 half the length of the basipodite of uropods III. 



Distribution: Antarctic species, known from the Pacific and Indian 

 Ocean sectors of the Antarctic, south of 64° S (the southernmost record, 

 67°23'S, 177°59' W). The three specimens were found in through catches 

 from depths of over 500 m to the surface. 



133 VII. Family SCINIDAE Stebbing, 1888 



Crustaceans of small to medium size, from 2.5 to 30 mm in length (with- 

 out antennae). The body is slightly flatened dorsoventrally, smooth or 

 with a low dorsal keel (genus Scina) or armed with strong denticles and 

 keels (genera Ctenoscina, Spinoscina, Acanthoscina). Pereon somites I 

 and II may be coalesced. The head is short but in width just slightly less 

 than the pereon. The eyes are small, sometimes not perceptible. Anten- 

 nae I are strong and almost the same length as the pereon and pleon 

 together; the single-segmented peduncle is much shorter than the power- 

 ful, narrowly conical, often almost linear basal segment of the flagellum, 

 which is equipped with longitudinal keels; in juvenile specimens the 

 distal segments of the flagellum are sometimes retained. Antennae II in 

 females are rudimentary; in sexually mature males they are long and thin 

 (genus Scina) or rudimentary (genus Ctenoscina). 



The mouthparts are more greatly reduced than in other families of the 

 Physosomata. The mandibles lack a palp, their cutting edge is narrow 



