C A R I D E A. 



591 



part; the fingers are parallel and nearly in contact when closed; in 

 both hands they are alike scabrous, and nearly naked. The basal scale 

 of the outer antennae is very slightly longer than the beak. The 

 beak in the larger specimens is somewhat arcuate above, but in 

 younger it is nearly straight, and with only four teeth below. 



PALiEMON EQUIDENS. 



Rostrum, recte ensiforme, verticaliter sat latum, apice parce reflexum, 

 squama antennali non brevius, supra rectiuscuhtm et 10-11-dentatum, 

 dentibus inter se fere ceque remotis, et supra tertiam partem dorsi cara- 

 paeis continuatis, duobus terminalibus minoribus et fere apicalibus ; 

 infra arcuatum et Q-dentatum. Pedes lmi rostrum multo superantes. 

 Pedes 2di longi, subcylindrici, subtilissimd spinulosi, brachii apice 

 apicem rostri attingente. 



Beak straight ensiform, and vertically rather broad, very slightly 

 reflexed at apex, not shorter than basal scale of outer antennae 

 above nearly straight and ten or eleven-toothed, teeth about 

 equally spaced, and continued over one-third of the back of the 

 carapax; last two teeth smaller and nearly apical, below six- 

 toothed. Anterior feet extending much beyond the beak ; second 

 pair long, subcylindrical, very minutely spinulous, extremity of 

 arm just reaching to apex of beak. 



Plate 39, fig. 2 a, outline of beak, natural size ; b, arm. 



Singapore. 



Length of body to extremity of beak, four and two-thirds inches. 

 The specimen is mutilated in its second pair of feet, and we cannot 

 give the characters of the hands. The species belongs to the division 

 of the genus in which the carapax has but one spine on the anterior 

 margin either side below the eye, with a second more posterior, and is 

 near the P. forceps. 



