106 AUSTKALIAN MALACOSTKACA. 



Genus Chasmagnathus, De Haan. 

 Carapace very thick, convex, sub- quadrate, with the sides 

 toothed, very slightly arcuate anteriorly, and the front curving 

 regularly downward. External maxillipedes having a wide 

 lozenge- shaped space when closed, the third joint truncate or 

 slightly excavate above. Eyes very stout. Anterior legs slightly 

 compressed. 



192. Chasmagnathus subquadratus. 



Chasmagnathus subquadratus, Dana, U.S. Explor. Exped., Crust, 

 i., p. 363. pi. xiii., fig. 5 (1852). 



Carapace convex, smooth, somewhat punctate posteriorly ; front 

 and antero-lateral margins as in C. Icevis. Antero- lateral margins 

 with two incisions, sides but slightly arcuate, premedial areolet 

 hardly distinct before or elsewhere. Posterior part of outer 

 maxillipeds and adjoining part of sternum very short hirsute. 

 Feet nearly as in C. Icevis. Hand not granulate, minute punctate. 

 Pterygostomian region very short reticulate. Fifth joint of 

 second feet tomentose above and on anterior surface, but not 

 below. Abdomen broader than usual at base and longer ciliate, 

 sides excavate. [Dana.'] 



New South "Wales ? (Dana). 



103. Chasmagnathus lsevis. A.M. 



Chasmagnathus Icevis, Dana, U.S. Explor. Exped., Crust., i., p. 

 367, pi. xxiii., fig. 7. 



Carapace convex, smooth, hardly granulous, somewhat areolate, 

 front and antero-lateral margin as in the granulatus, but the front 

 not having a point near the margin at the middle ; premedial 

 areolet abrupt anteriorly. Epistome in no part more prominent 

 than, the front. Anterior feet of male equal, hand slightly 

 granulate, not thin above. Posterior feet narrower than in 

 granulatus, fifth joint of second pair tomentose above and below 

 and on the anterior side. Sides of abdomen nearly straight, 

 obsoletely excavate. [-D-] 



Sydney ; Port Mollc. (W. A. H.) 



194. Chasmagnathus convexus. A.M. 



Chasmagnathus convexus, Haswell, 1. c. 



