876 THE VOYAGE OF H.M.S. CHALLENGER. 



lobe similar to that of the preceding pair, but smaller. The limb closely resembling 

 that of the third perseopods ; the front margin of the first joint more strongly spined ; 

 that of the third joint with spines at four points only, this margin being shorter than 

 in the preceding pair. 



Fifth Perieopods. — The side-plates small. The first joint and the third larger 

 than in the preceding pairs ; the limb in general similar. 



Pleopods. — The coupling spines small and slender, apparently with three small 

 hooks near the apex, and two long ones on the side lower down ; the cleft spines on 

 the first joint of the inner ramus numbering eight in the first pair, the margin above 

 them strongly ciliated, the outer arm of the cleft much longer than the inner ; the 

 joints of the rami numbering from twenty to twenty-three. 



Uropods. — Peduncles of the first pair a little longer than the rami ; the outer 

 ramus rather shorter than the inner ; peduncles of the second pair longer than the 

 outer, but rather shorter than the inner, ramus ; peduncles of the third pair scarcely so 

 long as the short outer ramus, much shorter than the inner ; the rami less broad than 

 in the two other pairs ; many small spines on the edges of all the rami, and of the 

 peduncles of the first two pairs, which have also spines at the apices of the rami ; the 

 peduncles of these two pairs reach equally far back, the inner ramus of the second as 

 far as the outer of the first, or a little further ; the peduncles of the third less far than 

 the other two, the inner ramus about as far as the outer of the second pair. 



Telson short, little longer than its breadth, not reaching the end of the peduncles 

 of the third uropods, narrowing distally to a very small extent, carrying some few cilia 

 at points on the surface. 



Length. — The specimen, in the position figured, from the point of the rostrum to 

 the dorsal apex of the second pleon-segment, measured eleven-twentieths of an inch. 



Locality. — Station 147, near Marion Island, December 30, 1873 ; lat. 46° 16' S., 

 long. 48° 27' E.; depth, 1600 fathoms ; bottom, Diatom ooze ; bottom temperature, 

 34° - 2. One specimen. 



Remark. — The specific name refers to the great depth from which the specimen 

 was brought up. 



Family Epimeridjs, G. 0. Sars, 1882. 



In 1870 Boeck established the Epimerinoe as twelfth subfamily of the Gammaridae, 

 between the Iphimedinse and Dexamininse ; in his latest work he retains the subfamily 

 unaltered, but places it fifth, immediately after the Oedicerinse in the list on page 74, 

 while in the body of the work he places it fourth, preceding the Oedicerinse. He assigns 

 to it only two genera, Acanthozone and Epimcria. In 1882 Sars named a family 

 Epimeridse, including in it the genera Epimeria, Lphimedia, Vertumnus, Odius, 



