148 ZOOLOGISCHE MEDEDEELINGEN — DEEL II. 



three specimens the carapace is 17 3 / 4 mm', long, the abdomen 45 mm. 

 inclusive the telson and 38 mm. without it. The front, though also 

 triangular, is comparatively broader at base and projects much less 

 forwards than the outer orbital angles. The abdominal somites are not 

 carinate at all, even of the 6th segment, though it is much compressed, 

 the upper margin is blunt, not sharp, and the terminal spine runs 

 horizontally backwards. The telson is less deeply grooved and its 

 posterior extremity is slightly convex, regularly rounded, pre- 

 senting another form than in Pas. propinqua. 



Leptochela robusta Stimpson. 



The examination of the numerous adult specimens, collected by the 

 „Siboga", males and ova-bearing females, led to the result, that, like 

 in Lept. carinata Ortm., the carapace of the female, which was hitherto 

 still unknown, is tricarinate dorsally, while it is rounded in the male. The 

 three carinae run parallel to near the posterior emargination of the 

 carapace and are separated from one another by two longitudinal grooves; 

 the median carina appears in the middle for some distance compressed, 

 though obtuse and low, but gradually widens anteriorly and posteriorly, 

 appearing then here rounded. Lateral carinae obtuse on the anterior third, 

 rounded posteriorly. 



Leptochela pugnax n. sp. 



Stat. 47. April 8/12. Bay of Bima, near south fort. 55 m. Bottom 

 mud with patches of fine coral sand. 1 male. 



Stat. 258. Dec. 12/16. Tual-anchorage, Kei-islands. 22 m. Bottom 

 Lithothamnion : sand and coral. 1 ova-bearing female. 



Stat. 261. Dec. 16/18. Elat, west coast of Grreat-Kei-island. 27 m. 

 Bottom mud. 1 female without eggs. 



A species of small size, the three specimens being only 14 or 15 mm. 

 long from apex of rostrum to tip of telson. Rostrum reaching beyond the 

 eyes to the distal extremity of 1 st antennular article, the acute extremity 

 distinctly turned upward. In the male the rostrum arises with a rounded 

 carina nearly at the anterior third of the carapace," which, posterior to it, 

 is rounded dorsally; in the female the carapace appears tricarinate along 

 six-sevenths of the upper border, the median carina compressed, subacute 

 in the middle, more blunt anteriorly and posteriorly, lateral carinae 

 rounded and only defined on the inner side by the grooves on each side 

 of the median crest. Outer angle of the orbits spinifor]m, anteroinferior 

 angle of carapace obtuse. 



