C A R I D E A. 551 



pairs of legs. The fifth pair of legs is much narrower than the 

 fourth. 



B. Articulus antennarum externarum Imus spint cxterna armatus. 

 a. Orbitse margo inermis. 



ALPHEUS PAEVI-ROSTRIS. 



Corpus nudum. Rostrum acutum, breve, superficie inter oculos carinatd. 

 /Squama antennarum externarum basalis basi utroque paulo longior; 

 spina basalis mediocris ; dens internarum basalis brevis; articulus 

 2dus \mo vix longior. Pedes antici, valde incequi, manu majore cras- 

 sissimd, marginibus ambobus indentatd, superficie externd partim sul- 

 catd, digitis perbrevibus, digito mobili extus arcuato; manu minore 

 regulari, pubescente. Pedes 2di Ztiis paulo longwres, articulo carpi 

 \mo fere duplo longiore quam 2dus, manu brevi. Pedes 3tii 4tique 

 crassiusculi, articulo 3tio apicem inferiorem unidentato. 



Body naked. Beak acute, short, surface between the eyes carinate. 

 Basal scale of outer antennas rather longer than base of either pair. 

 Basal spine moderately long ; basal tooth of inner pair short, second 

 joint hardly longer than first. Feet of first pair very unequal, 

 larger hand very stout, both margins indented, outer surface having 

 a sulcus, fingers very short, the moveable one arcuate in outer 

 margin; smaller hand regular, with some long pubescence. Feet 

 of second pair but little longer than third, first joint of carpus twice 

 as long as second, hand short. Third and fourth pairs of feet 

 rather stout, third joint unidentate at inferior apex. 



Plate 35, fig. 3 a, side view of front, much enlarged ; b, part of 

 outer maxilliped ; c, larger hand, enlarged ; d, smaller hand ; e, part 

 of leg of second pair ; /, part of leg of third pair. 



Straits of Balabac, north of Borneo. 



Length of body, eight lines. The beak rises from the frontal margin 

 and is short and acute. The carpus of the second pair of feet has the 



