390 DR. J. G. DE MAN ON CRUSTACEA CHIEFLT 



branchial regions are nearly globular and very large, being twice as broad as the gastric 

 region. There is no postocular constriction of the carapace. The antero-lateral margins 

 whi'jh run at first outward, then curve baclvward and upward, terminating on the 

 outer surface of the branchial globes in a triangular, compressed tooth which is directed 

 outward ; at the level of the subacute tips of these teeth the carapace shows its greatest 

 breadth. The cristiform, antero-lateral margins are thus curved S-like; the described 

 largest tooth is followed anteriorly by three or four others, that gradually become 

 smaller, which, lilie the former, are granulated or denticulate on their margins. The 

 anterior part of tlie antero-lateral liorder, defining the hepatic region laterally, is entire, 

 not granulate. From the largest tooth the likewise cristiform and finely denticulate 

 postero-lateral margin runs at first backward and upward, then it turns suddenly 

 downward and inward at a right angle until near the base of the branchial regions; 

 at this angle the postero-lateral margin carries another, rather obtuse tooth, which is 

 smaller than that at the posterior end of the antero-lateral border and which is directed 

 backward and outward. At the base of the branchial I'egions, finally, the postero-lateral 

 margins curve for a short distance forward, not uniting therefore with the posterior 

 border of the carapace ; just at this curve they carry a rounded, obtuse toolh or promi- 

 nence. From the angle where the postero-lateral margin turns suddenly downward a 

 finely granulated ridge runs upon the upper surface of the branchial region forward 

 and inward; just outside of this ridge the upper surface is a little concave, but more 

 outward and forward it is regularly convex and also on the inner side of that ridge. 

 For the rest the branchial regions are smooth, very finely punctate, the puncta being 

 not crowded, except just near the granulated ridge above. 



The orbital margins are smooth. The posterior wall of the orbits is marked with a 

 narrow, linear fissure, the lower wall has a large triangular notch, and the obtuse, internal 

 angle is little prominent. From the inner infraorbital tooth a ridge extends backward 

 that makes a right angle with the acute tooth at the antero-lateral angle of the buccal 

 frame. From the last-mentioned tooth a prominent granulated ridge runs obliquely 

 backward on the pterygostomian regions, parallel with the antero-lateral border of the 

 carapace; between the latter and the granulated ridge the subhepatic region is, just 

 below the orbits, deeply concave. At the level of the middle of the buccal frame the 

 pterygo-stomian ridge has a triangular notch. 



The external maxillipeds are granular ; on the inner half of the merus-joints the 

 granules are larger. The sternum is granulated. The abdominal somites carry each a 

 compressed, transverse tooth in the middle and another smaller one at the lateral angles ; 

 the teeth are granulated and there are granules between them ; the second somite is 

 visible when the carapace is looked at from above. 



The chelipeds are subequal, the right a little longer than the left. The right cheliped, 

 16 mm. long, is little more than twice as long as the carapace, it is thus of moderate 

 length. The arm, 7 mm. long, is quadrilateral and projects only one-third of its length 

 beyond the carapace ; its surfaces are smooth. The anterior surface makes a right 

 angle with the lower; the edge between both is beset with small, subacute teeth. Both 

 the anterior and the posterior borders carry small, compressed, triangular teeth, which 



