376 CRUSTACEA. 



antennarum externarum ~Lmus transversus, apice utrinque productus et 

 subacutus, superficie granulalus, processu orbitam antennamque sejun- 

 gente subtriangulato, trihedrico, nan truncate. 



Carapax obese, throughout convex above, antero-lateral sides very 

 tumid, without any trace of a margin or angle. First joint of outer 

 antennae transverse, apex either side of next joint prolonged and 

 subacute ; process adjoining (between the base of these antennae 

 and the orbit), subtriangular, trihedral, not truncate. 



Plate 24, fig. 1, part of carapax, under side, natural size. 



Peacock Island, of the Paumotu Archipelago. 



Length of carapax, three inches; breadth, three and two-thirds 

 inches; length of the front, between the eyes, twelve lines; same, 

 between the angles of the margin just above the outer antennae, nine 

 and a half lines ; breadth of buccal area anteriorly, nine lines. The 

 process between the outer antennae and orbits, has the outer side 

 arcuate, the inner excavate, and the outer surface adjoining the inner 

 margin concave. The second joint of the outer antennae is small and 

 polygonal. Upon the surface of the carapax near the front margin, 

 the front of the proamedial areolet is but slightly indicated. The 

 only specimen of this species saved from among the many collected, is 

 a carapax. 



C. obesum, DANA, Proc. Acad. Nat. Sci. Philad., 1851, v. 252. 



CARDISOMA HIRTIPES. 



Carapax longitudinaliter convexus, margine laterali antice notatus, prope 

 dentem postorbitalem minutd apiculato, areold prcemediand antice 

 juxta frontem paulo abruptd, regicme pterygostamiand pilosd. Pro- 

 cessus prceorbitalis orbitam antennamque externam sejungens triangu- 

 latus, trihedricus. Articulus antennarum externarum \rnus rectan- 

 gulatus, apice rectd truncatus. Pedes maris antici crassi, sulxequi, sat 

 breves, manu punctatd, breviore quam latitude carapacis, parte manus 

 ante digitos breviore quam altiore, digitis late hiantibus. Pedes pos- 

 tici hirli. 



