608 CRUSTACEA. 



recto, apicem vix recurvato, supra ~LQ-dentato, infra 3-dentato. Abdo- 

 men inerme. 



Carapax mostly smooth, crossed obliquely by two or three sulci, the 

 strongest of which extends from middle of back nearly to antero- 

 lateral angle, the margin- of it spinulous ; antero-lateral surface 

 of carapax armed with spinules; beak ensiform, a little longer than 

 base of inner antennae, and hardly shorter than antennary scale, 

 nearly straight, scarcely recurved at apex, ten-dentate above, three- 

 dentate below. Abdomen unarmed. 



Plate 40, fig. 9, animal, enlarged five diameters. 

 Feejee Islands. 



Length, about half an inch. This species, like the 'spinosus, has 

 the outer maxillipeds quite long pediform, and with only an obso- 

 lescent palpus ; the body not compressed, abdomen not at all cari- 

 nated, the tarsus short and bifid. The third pair of legs is broken 

 from the specimen, and also part of the flagella of the antennae, as 

 shown in the figure. There is a spinule on the back, just behind the 

 more prominent sulcus. The teeth of the beak are small and regular, 

 being nearly equidistant, except that the posterior is a little more 

 remote from the preceding, and the first of the teeth below is farther 

 from the second than the second from the third. The abdominal 

 segments near the lateral margin, have the surface a little uneven. 



FAMILY SERGESTID^. 



ACETES INDICUS, Edwards. 

 Singapore. 

 A. indicus, EDWARDS, Ann. des Sci. Nat., xix. 350, pi. 11 ; Crust., ii. 430. 



