Species of Amphipodous Crustaceans. 365 



articulation being about as thick as the preceding joint of the 

 peduncle. The second, third, fourth, and last articulations 

 cany long pairs of olfactory filaments. 



The fourth and fifth joints of the peduncle in the lower 

 antennae are long and slender, each being equal in length to 

 the entire peduncle of the upper antennse. The flagellum is 

 of six articulations. 



The eyes are of moderate dimensions, with a rounded oval 

 form. The rostrum is bent down between the upper antennse. 

 The maxillipeds have a long four-jointed palp, the fourth joint 

 being bright, sharp, and unguiform. 



Between the first and second gnathopods it is difficult to 

 detect any ditference whatever, except in regard to the coxae, 

 those of the first pair being minute and almost obscured by 

 the overlapping of their neighbours. The coxte of the second 

 pair are themselves of no great size, and are in their turn 

 overlapped to a great extent by the large coxae of the third 

 pair of legs. In the first gnathopods the thigh is moderately 

 long and slender, the knee small, the metacarpus but little 

 longer than the knee, overlapping the wrist throughout almost 

 its whole extent, and having its truncate distal extremity 

 capped with three setse. The wrist is longer than the hand, 

 along which it is produced almost as far as the ill-defined 

 palm ; it bears some four or five spines along the margin. 

 The hand is elongate, narrower at the junction with the wrist 

 than at the commencement of the palm, which is bordered 

 with four pairs of spines. All these spines, at about a third of 

 their length from their origin, are abruptly narrow ; the distal 

 half is pectinate on both sides. On the margin of wrist and 

 hand away from the palm there are two or three minute 

 spines. The finger is curved, thin, and sharp, with a small 

 denticle at the base of the nail. 



The more or less triangular coxa of the second gnathopods 

 has a single indent at its lower angle. The rest of the limb 

 seems in all its details to resemble the first gnathopod. This 

 remarkable similarity of the two pairs of limbs would suggest 

 the inference that the specimen examined was a female, but 

 that the development of the olfactory filaments on the upper 

 antennse rather points to its being of the other sex. 



The third and fourth feet have the coxje largely developed, 

 with their lower edges serrated. The hinder margin of the 

 fourth and largest coxa is produced backwards in a sort of 

 lobe. The thighs of these pairs of feet are long, with spines 

 along the front edge. In the three following pairs of feet 

 the coxae are small, the thighs large, ovate, very transparent, 

 the metac.arpus posteriorly decurrent; the wrist and hand. 



