328 CRUSTACEA. 



general, corresponding to the above description. Horn of eye shorter, 

 about half as long as preceding part of eye. Large hand somewhat 

 smaller and not so rough above, but of the same proportions. Third 

 joint of outer maxilliped two and a half lines long, two lines wide at 

 base. Anterior surface of fifth joint of second and third pairs of legs 

 with only two dense rows of hairs, and one of these obsolescent. The 

 hairy oblique line on inner surface of hand near articulation much 

 narrower or less hairy. 



The lateral margins of upper surface of carapax in both are ante- 

 riorly for a short distance parallel. 



OCYPODA URVILLII, Guerin. 



Plate 20, fig. 5 a, outline of male, natural size ; b, outer maxillipeds, 

 enlarged three and a half diameters; c, outline of larger hand, en- 

 larged two and a half diameters. 



Sandwich Islands. 



This species resembles the brevicornis, as it has the eyes barely tipped 

 with a short point. But it is a somewhat broader species : length of 

 a male, six and a half lines ; breadth, eight lines; ratio, 1 : T23. The 

 outer maxillipeds differ in having the second and third joints very 

 nearly smooth and somewhat shining, and the third joint is transverse, 

 and much broader at base than at apex. The large hand is broad and 

 fine granulous, and the carpus is acute at the outer as well as inner 

 angle. The smaller hand is of the usual form. The tarsus of the 

 following pairs is not wider towards its extremity. Penult joint of 

 male abdomen about as long as broad. Base of inner antennae a large 

 pearly-looking joint. Prominence within orbit near its inner limit 

 not denticulate, a little pubescent. Fifth joint of second and third 

 pairs of legs somewhat pubescent, and with a few minute stiffer hairs. 



Carapax evenly granulous ; as broad at the anterior angles as pos- 

 teriorly, these angles very slightly advanced, but much posterior to 

 inner part of upper orbital margin. Pterygostornian region nearly 

 smooth. 



We cannot be confident that this is the Urvillii figured in the Co- 

 quille, for want of details connected with that figure ; but it appears 



