CKl STACKA MALACOSTRACA. 111. 



'33 



joints. The antenna- somewhat more than twice as long as the body. Third joint of the peduncle 

 (fig. 3 I)) large, with the inner distal comer produced into a rather long and robust proocM directed 

 forwards and inwards; the squama is not marked off by any suture and is shaped as a subconical tubercle; 

 fourth joint about as long as broad. -- Left mandible (fig. 30) with the incisive part, the movable 

 lacinia and the setae well developed; the molar process is of moderate length, very thick at the base 

 and tapering much to the end, which is cut off obliquely. Maxillipeds (fig. 3d) moderately broad; 

 fifth joint very broad and slightly broader than the fourth; sixth joint with a somewhat small lobe; 

 epipod more than twice as long as broad, with the distal half of the outer margin cuncave, and a 

 protruding obtuse angle at the middle of that margin. 



First thoracic segment (fig. 3 a) has a small median process at the front margin, while each 

 antcro-lateral corner is produced in a robust and moderately long process directed outwards and much 

 forwards. The three following segments each with a median process directed upwards and forwards; 

 each antero-lateral corner is produced into a slender, moderately small process, and l>ehind this pro- 

 cess is seen the epimeron, which is bifid, with its anterior part produced into a long and a little curved 

 process directed forwards and outwards, and its posterior part produced into a tooth. - The three 

 posterior segments are, as already stated, dorsally fused, so that no suture but only an impression is 

 seen on the broad median part; each segment has a pair of short dorsal processes, and the side is 

 produced into a long, on fifth and sixth segments even very long, process. The dorsal processes on 

 all thoracic segments are conspicuously longer in the male than in the female, while sexual difference 

 is on the whole less developed in the lateral processes. - The articulation between thorax and abdo- 

 men allows a feeble movement 



The four anterior pairs of legs (figs. 3 e, 3 f and 3 g) in the main as in some smaller species of 

 Eurycope ; third (fig. 3 g) and fourth pairs subsimilar in length and scarcely as long as the body. Se- 

 cond to fourth pair yet more robust than in Eurycope, with sixth joint increasing considerably in 

 depth from base to end, and armed on the lower margin with a moderate number of strong spines; 

 seventh joint uncommonly long, about two-thirds or more as long as the sixth. The three posterior 

 pairs (figs. 3 h and 3 i) have the fifth joint about three times as long as broad, and almost the proxi- 

 mal half of the lower margin without setae; sixth joint nearly as long as the fifth, but conspicuously 

 more narrow and closely set with seta along most of both margins; seventh joint -- with the claw 

 not marked off about three-fourths as long as sixth joint 



Abdomen without any short basal segment; on the surface it has a median vertical tubercle 

 near the base and a pair of submedian minute tubercles behind the middle, on each side a long basal 

 process and a similar process behind the middle; the posterior part is a little produced but broad, 

 with the hind margin straight or slightly concave, and each lateral margin of the produced part u 

 convex and serrate (fig. 3k). The female operculum (fig. 3 k) nearly as long as broad, with the po- 

 sterior half of the margin semicircular. In the male the operculum (fig. 3 1) is somewhat longer than 

 broad; the median lamella with the major part of the lateral margins considerably concave, as each 

 pleopod tapers from the moderately broad basal part to near the middle, then is gradually widened to 

 somewhat from the end and finally tapers to the end, which has the outer corner produced as a tri- 

 angular protuberance, and the hind margin of the lamella is consequently somewhat incised (fig. 3 in); 



