36 



THE VOYAGE OF H.M.S. CHALLENGER. 



Description of the Species Dredged DUPaNG the Challenger Expedition. 



Nympho7i, Fabr. 



N'l/mjyhon haiiuitum, n. sp. (PL L). 



Diagnosis. — Body slender, body and legs almost entirely smooth ; eyes obsolete, 

 auxiliary claws wanting ; second joint of the palpi longer than the third ; second joint 

 of the leg longer than the fii-st and the thiixl ; second tarsal joint of the leg longer 

 than the first. 



Desc7-i2>tion. — The body is slender, and the lateral processes are separated. The pro- 

 boscis is large, almost one-third the length of the body, slightly swollen in the middle, 

 and again at the extremity. The mouth is triangular, not very large. The cephalo- 

 thoracic segment (with the base of the mandibles swollen) is almost as long as the 

 proboscis. The eyes are obsolete, represented only by two small knobs behind the lateral 

 process of the cephalothoracic segment. The abdomen is rather large ; the mandibles 

 large, with the basal joint as long as the rostrum ; the claws of the chelse are elongated ; 

 the immovable claw more strongly curved than the movable one (PI. I. fig. 3). Both 

 claws are armed with spines ; on the movable claw they are more numerous and larger 

 (fig. 3). Seen but slightly magnified, the mandibles are smooth ; when greatly magnified 

 they show small hairs all over the surface. 



The palpi are slender, longer than the rostrum ; the second joint is longer than the 

 third, the fifth longer than the fourth ; they increase in length as follows : — First, 



