REPORT ON THE AMPHIPODA. 849 



very long ; the finger about as long as the preceding joint, straight, slender, tapering, 

 serrate on both edges, and provided all along with slender spines or setsd. This limb is 

 very much longer than that which precedes it, but not nearly double its length, since it is 

 only in the fourth joint that it attains that superiority, while in the third joint it is but 

 a trifle longer. 



Pleopods. — The coupling spines show on one side two lateral retroverted teeth besides 

 that at the apex, and several denticles along the other side ; the cleft spines are eight in num- 

 ber, at least on the first and second pairs, the arms very short and nearly equal, one as usual 

 having the form which I have called spoon-shaped, but which might better be likened to 

 the hand of a clock, the other conspicuously denticulate ; the first joint of the outer ramus 

 has a conspicuous interlocking process at the base ; the joints of the rami number from 

 twenty -six to thirty, those near to the large first joint being very short and broad. 



Uropods. — The peduncles of the three pairs reaching back almost to the same point, 

 with the variation in length which this demands, their edges and those of the rami fringed 

 with very numerous spines, the rami of the first j^air longer than those of the second, and 

 the second longer than the third, in each pair subequal, lanceolate, the inner margins of 

 the outer and the outer margins of the inner rami being finely pectinate, the apices tapering 

 rather abruptly. 



Telson small, nearly square, but with the lateral margins a little convex and the distal 

 a little emarginate, all three more or less ciliated. 



Length. — The specimen measured three-quarters of an inch from the tip of the rostrum 

 to the end of the first uropods in the position figured ; the largest specimen was an inch and 

 a quarter long. 



Localities. — Station 149h, Cumberland Bay, Kerguelen Island; depth, 127 fathoms; 

 bottom, volcanic mud. Five specimens. 



Station 150, off Heard Island, February 2, 1874 ; depth, 150 fathoms; bottom, coarse 

 gravel ; bottom temperature, 35°"2. One specimen. 



Remarks. — Originally I placed this species in the genus Oediceropsis, Lilljeborg, and 

 named it CEdiceropsis rostrata, to emphasize its possession of a large rostrum as dis- 

 tinguished from Oedicerop)sis hrevicomis, Lilljeborg, to which in some respects it bore a 

 great resemblance. Subsequently I found that in this and two other new species the 

 inner plate of the first maxillaj was large, not small as in Oediceropsis, nor was the inner 

 plate of the second maxillse much wider than the outer, as in Oediceropsis. IMoreover, 

 the last-named genus was specially instituted for a species without a rostrum, and with 

 lateral eyes, in these respects differing from all the three new species in question. For 

 these, therefore, I thought it expedient to institute the new genus CEdiceroides. But 

 in a genus in which every species has a rostrum, the name rostrata was not very suitaljle 

 for any one species. For this reason it seemed advisable to change the name of the 



(ZOOL. CHALL. EXP.— PART LXVIL 1887.) XxX 107 



