66 DE. J. G. DE MAN ON THE PbBOPHTHAXMOtJS 



is not at all prominent. Tlie antero-lateral margins are scarcely 

 shorter than the postero-lateral and are armed behind the external 

 angles of the orbits, which are not at all prominent, with four 

 teeth, the anterior one of which is represented by a rather blunt, 

 low, rounded prominence which is itself crenulate. The second 

 resembles the first in being crenulate, but it terminates in a 

 minute spine, and the two posterior teeth are distinctly spini- 

 form. There is no trace of a subhepatic tooth or spine. The 

 endostorae is faintly ridged. 



The chelipedes and the other legs seem to resemble those of 

 the specimens collected during the voyage of H.M.S. 'Alert.' 

 The Jeft chelipede is much larger than the right and granular, 

 some larger granules of the outer surface of the palm being 

 arranged in longitudinal series. The hand of the smaller cheli- 

 pede is very hairy externally. The small specimen is only 

 7 millim. broad and scarcely 5 millim. long. 



This species is somewhat allied to Pilumnus DeJiaanii, Miers, 

 from the Japanese seas, but P. seminudus has a more enlarged 

 cephalothorax. Although Miers's specimen agrees very well 

 with the description of P. seminudus, I would point out that 

 the existence of four antero-lateral teeth has not been clearly 

 indicated by the English carcinologist, and that the granules 

 with which the anterior legs are covered are rather conspicuous. 



Pilumnus seminudus has been recorded from the eastern and 

 north-eastern coasts of Australia (Port Denison, Torres Strait). 



43. Pilumnus lj^vis, Dana. (PI. IV. figs. 1 & 2.) 



Pilumnus IfEvis, Dana, Conspectus Crustaceorum Sfc. in Proc. Acad. 

 Nat. Sci. Philadelphia, vol. vi. p. 82 (May 1852). 



Two specimens ( c? $ ), not yet full-grown, were collected at 

 Sullivan Island. 



In this small species the carapace is broader than long, the 

 proportion of the di.-^tance between the last antero-lateral teeth to 

 the length of the cephalothorax (the basal portion of the abdo- 

 men, as far as it is visible from above, excluded) being about as 

 7 to 5. The upper surface is a little convex and perfectly smooth; 

 the regions are quite indistinct, there being no trace of divisional 

 lines, except the usual longitudinal median furrow on the front, 

 which separates the epigastric regions and the usual transverse 

 cervical suture. The upper surface is, however, a little hairy, 

 and presents three elevated transverse lines, which are clothed 



