368 Rev. T. R. R. Stebbing on hoo new 



articulation. The lower antennae are set very far back, with 

 the first two joints short, the third equalling their combined 

 length ; the fourth considerably longer, much thinner, distally 

 thickest, curved and slightly ciliated; the fifth joint the 

 longest, thin, straight, and ciliated ; the flagellum of ten arti- 

 culations. The peduncle in the lower antennae nearly or 

 quite equals in length peduncle and flagellum together of the 

 upper. 



The head is produced into a sharp point, between the upper 

 and lower antennae; this angle is occupied by the oblique 

 oval eyes. The mandibles are armed with two strong spine- 

 like teeth, followed by four spines. The palp is long, com- 

 posed of a short basal joint and two others much longer, 

 subequal to one another, the last truncate and ciliated at 

 the end. The palp of the maxillipeds ends in an unguiform 

 joint, the penultimate joint being short, distally thickened, 

 and the antepenultimate oval, very long, ciliated round the 

 lower margin. 



Owing to the extreme transparency of the animal, especially 

 after mounting, the lines of demarcation of the coxse were 

 difficult to make out with certainty. The coxa of the second 

 segment, however, is very conspicuously larger than any of 

 the others, which are all small and shallow. The first gna- 

 thopods have the thighs slender, a little curved and distally 

 widened, the knee small, the metacarpus a little larger and 

 produced into a point, the wrist somewhat longer than the 

 hand and as long as the thigh, for most of its length parallel- 

 sided, the lower margin carrying six tufts of cilia springing 

 from slight indentations; the hand has the upper margin 

 curved, with cilia at intervals, the lower margin also curved 

 and deeply indented, carrying four large spines interspaced 

 with long cilia ; the palm is microscopically crenulate. The 

 finger is nearly as long as the hand, thick throughout nearly 

 its whole length, but tipped with a small nail. The second 

 gnathopods resemble the first as far as the wrist ; but this joint 

 is mucli broader without being quite so long ; it has both mar- 

 gins curved, the lower tufted ; the hand is much longer and 

 centrally a good deal broader than the wrist, with the upper 

 margin curved, the lower straight and tufted with cilia ; the 

 palm is sinuous, with a rounded central process, and near the 

 lower angle a movable tooth-like spine. The massive finger 

 closes down just within the straight lower margin, and is 

 in shape like that of the first gnathopods. In the third and 

 fourth legs the hand is thin, not longer than the metacarpus, 

 the nail short. In the last three pairs the thighs are some- 

 what broader than in the preceding limbs, and are narrowed 



