CRUSTACEA MALACOSTRACA. II. 



Ill 



Chelipeds robust and on the whole agreeing with those in C. Voringii excepting in the armature 

 of the fixed finger (fig. 2 c), which has the distal large tubercle furnished with two incisions dividing 

 its margin into three rounded teeth, and the proximal protuberance is higher and better defined than 

 in C. Voringii ; in my specimens both fingers have their ends acute, while they are obtuse in my 

 female of C. Voringii. 



Thoracic segments (fig. 2 a) decrease distinctly in breadth from second to sixth. Second seg- 

 ment is slightly shorter than the third which is as long as the fourth and only slightly shorter 

 than the fifth. Second to fourth segments increase conspicuously in breadth from their posterior 

 to the anterior, rather broadly rounded angle, while fifth and sixth segments are subrectangular 

 with their angles rounded and the lateral margins feebly protuberant behind the middle; seventh seg- 

 ment broader behind than in front. — The thoracic legs as in C. Voringii; fig. 2d shows that in the 

 posterior pairs sixth joint is considerably longer and thinner than the fifth and distinctly longer than 

 seventh with claw; fig. 2 £ shows that the upper terminal spine on sixth joint is strong and adorned 

 with some five pairs of lateral, oblique branches (a somewhat similar spine is found in C. Voringii). 



Abdomen in the subadult male (fig. 2a) as long as the three preceding segments combined; its 

 anterior half is as broad as seventh thoracic segment, but from the fourth segment the abdomen 

 tapers conspicuously; in the young female the last thoracic segment has not arrived at full size and 

 the abdomen is somewhat narrower than sixth segment, slightly longer than fifth and sixth segments 

 combined and not tapering, as the sixth segment is fully as broad as the first. In the male (fig. 2d) 

 the armature of the ventral side is strongly developed; the process from third segment is very long, 

 acute, subtriangular, with the anterior margin a little convex and the posterior margin somewhat 

 concave, directed mainly downwards; the process from second segment is much shorter than the third 

 though still large, triangular and as long as broad; the first segment has only a somewhat low, 

 triangular tubercle, fourth segment a somewhat higher tubercle, and on the fifth segment the protub- 

 erance is rudimentary. In the young female the processes (fig. 2g) or tubercles are conspicuously less 

 developed, but show nearly the same relative proportions as to length. Pleopods completely wanting 

 in the female, while in the subadult male they are well developed (fig. 2 d), somewhat long, biramous, 

 with moderately long seta;. — Uropods (figs. 2d and 2g) distinctly more slender and longer than in 

 C. Voringii; peduncle at least as deep as long; endopod with the two joints subequal in length; 

 exopod two-jointed, somewhat shorter and considerably thinner than the endopod. 



Length of the subadult male 3.8 mm ., of the young female 3.3 mm . (The female specimen described 

 by Norman & Stebbing was 4 mm . long). 



Adult Male (figs. 2 h— 2 k). On the whole somewhat reminding of males of the genus 

 Leptognathia. — Antennulse (fig. 2I1) as long as the carapace and second thoracic segment combined, 

 seven-jointed. First joint twice as long as deep; second joint thick and slightly more than half as 

 long as the first; third and fourth joints very short and fifth joint short, all three somewhat cup- 

 shaped and fourth and fifth joints each with a close row of extremely long sensory hairs; sixth joint 

 about as long as the four preceding joints combined, at the end with a row of very long sensory 

 hairs; seventh joint long, nearly as long as the first and much thinner than the sixth, slightly longer 

 than the terminal setae. 



