HQ2 CRUSTACEA. 



no angles in the specimen of the hebes examined ; the abdomen is 

 four-jointed, instead of three, the longish seta near the base of the 

 anterior antennas was not observed, or not one nearly as long. It 

 may be that this is the result after an additional moulting, and that 

 both are thus related. 



The following may possibly be male of this species. 



Cephalothorax rather slender, posterior angles long acute; head 

 separated by an imperfect suture, laterally armed ; posterior segments 

 three. Abdomen four-jointed. Caudal stylets short, setae unequal, 

 the second half longer than the others. Superior eyes separate, infe- 

 rior quite small. Anterior antennae a little shorter than the body, 

 divergent about 170°, tips curving forward a little; the right few- 

 jointed, subterete, joints 2, 3, 4, 5, 6, oblong, the third rather stout, 

 7, 8, 9 (the terminal) short; setae rather short, apical and posterior 

 antepenult not longer than the joint, the posterior penult one-half 

 longer, the anterior antepenult very short. Posterior antennae very 

 slender, branches about equal, the setae not longer than the branches. 



Plate 81, fig. 8 a, animal, enlarged ; a', extremity of antenna. 



Collected in the East Indies, west of the Island of Panay, January 

 28, 1842. 



Length, one-twelfth of an inch. Nearly colourless; caudal setae 

 and anterior antennae, brownish yellow; alimentary canal, light green. 

 This resembles the preceding; but the posterior antennae are remark- 

 ably slender, and the branches are about equal. Owing to this last 

 character, I have doubted its being the male of the preceding. The 

 caudal stylets are a little longer than broad. In the right antenna of 

 the male, near the base of the third joint, there is a seta about as long 

 as the second joint ; on the fourth joint, which is the longest and largest 

 of the antenna, there are two longish setae distant from one another ; 

 this joint has two transverse sutures towards its base ; at the apex of 

 the next joint there is a seta as long as the last joint of the antenna. 

 The pigment of the inferior eyes is quite small, and is seen in a ver- 

 tical view behind the superior eyes. 



