1869.1 279 [Smith. 



lous and distinctly four-lobed as seen from above, the median lobes 

 much the largest, extending farther forward than the lateral, and 

 separated by a distinct fissure from which a deep median groove 

 extends a short distance backward. Superior margin of the orbit 

 divided by two deep fissures. Post-orbital tooth stout, separated 

 from the second tooth of the antero-lateral border by a deep, rounded 

 sinus, and forming with it a prominent bidentate lobe, the teeth being 

 of nearly equal prominence; remaining teeth large and very promi- 

 nent; third tooth with its apex strongly hooked forward, and its outer 

 or posterior edge arcuate; fourth tooth very long, the apex rather 

 slender and turned abruptly forward ; fifth, or posterior tooth, narrow 

 and vertically thickened, the apex slender and curved forward. In- 

 ferior lateral regions rather coarsely granulous and clothed with a 

 hairy pubescence. Inferior margin of the orbit divided by a deep 

 fissure into two lobes, the inner one projecting forward as a long, stout 

 tooth, the outer one broad, with the outer angle of the anterior edge 

 strongly projecting. Tubercle of the sub-hepatic region stout and 

 spiniform. 



Chelipeds with the carpi rugose externally, and with a shallow 

 depression along the outer border next the articulation with the hand; 

 hands a little unequal, stout, obtusely carinated on the upper edge, 

 very slightly rugose above; dactyli with a rounded carina on the 

 upper edge at the base; all the fingers irregularly toothed within, and 

 marked with distinct longitudinal impressed strias; in the larger 

 hand, a stout tooth at the base of the dactylus, and a rudimentary 

 tubercle on the outer anterior edge of the palm between the bases of 

 the fingers. Ambulatory feet stout and very pubescent, especially on 

 the terminal joints. Fingers dark brown, lighter at the tips. 



Length of carajsax in a male, 30.0 millim. ; breadth, 43.2 millim. ; 

 ratio, 1 : 1.44. 



Panama and Acajutea; F. H. Bradley. 



This species appears to be closely allied to P. chilensis Edw. et 

 Lucas (Voy. dans l'Amer. Merid. de D'Orbigny, Crust., p. 16, pi. 

 viii, fig. 2), but the fingers in that species are said to be " non can- 

 neles," and the carapax seems to be much smoother than in the 

 Panama species. 



Panopeus oecidentalis Saussure, Crust, nouv. de Mexique et 

 des Antilles, p. 15, pi. i, fig. 6, 1858. 



In the Society's collection there is a specimen of Panopeus collected 

 at the Bahamas by Dr. Bryant, which evidently belongs to this species. 



