GRAPSOIDEA. 355 



Length of carapax of male, fifteen lines j breadth, seventeen and a 

 half lines; length of front measured between eyes, seven lines; length 

 of hand of male to apex of moveable finger extended, twenty lines ; 

 height of hand, nine and a half lines ; height of hand of female of like 

 size, five lines. The intramedial areolet is strongly circumscribed, 

 excepting its anterior prolongation ; the surface is quite convex either 

 side of the medial line in front, but the outline of the prsemedial areo- 

 let is not distinguishable. The third joint of the outer maxillipeds is 

 rather longer than the second. On the postero-lateral region there is 

 a raised line running obliquely inward and backward. Besides the 

 two incisions or emarginations on the lateral margin, as described, 

 there is another obsolete one more posteriorly. 



C. granulatus, Dana, Proc. Acad. Nat. Sci. Philad., 1851, v. 251. 



Chasmagnathus l^evis. 



Carapax convexus, Icevis, vix granulatus, paulo areolaris, /route mar- 

 gineque antero-laterali uti in granulato sed fronte juxta marginem 

 medio non apicidato, areold praemediand antice prwruptd. Epis- 

 toma fronte nunquam promimntius. Pedes antici maris cequi, tnanu 

 leviter granulatd, supra non tenui. Pedes postici angustiores ; arii- 

 culus pedis 2di §tus infra antice supraque tomentosus. Abdomen 

 lateribus fere rectum, obsolete excavatum. 



Carapax 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 middle; prsemedial 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. 



Plate 23, fig. la, male, natural size; b, male abdomen and sternum, 

 ibid. ; c, outer maxillipeds, enlarged two diameters ; d, natural size. 



Sydney, New South Wales. 



92 



