REPORT ON THE AMPHIPODA. 1475 



on the inner side ; there is a small incision just above the apex of the convex hind margin, 

 followed by a little rounded lobe, as if a second joint had been thought of, and the 

 intention abandoned ; the front margin is concave except where it curves round to this 

 lobe. 



Pleopods. — The peduncles strong, with a deep lobe at the inner end of the lower 

 margin ; the two coupling spines small, with circular heads, the rims of which are denti- 

 culate ; the cleft spine short and strong, the arms subequal ; the joints of the rami 

 numbering ten or eleven on the inner, eleven or twelve on the outer. 



Uropods. — The peduncles of the first pair widening distally, very slightly longer than 

 the rami, pectinate on the outer margin and outer half of the lower margin ; the outer 

 ramus long oval, but with apex somewhat angular, the outer margin and lower part of 

 the inner pectinate ; the inner slightly shorter and narrower, being flattened on its outer 

 side, almost smooth ; the peduncles of the second pair starting almost from the same 

 point as the preceding but scarcely half their length ; the outer ramus elongate oval, 

 narrow, and almost pointed at each end ; the inner ramus longer than the outer or than 

 any of the other rami, widening distally, and ending in an obtuse angle ; the peduncles of 

 the third pair very small, attached below the middle of the composite segment, at the 

 point where the part of it belonging to the telson may be supposed to begin ; the rami 

 nearly like those of the second pair, but considerably smaller, and the inner having its 

 outer side the straighter ; this ramus reaches just beyond the telson, while the outer ramus 

 just reaches beyond the inner ramus of the first pair, but not so far as the outer ramus 

 of that pair. 



The Telson has been already described. 



Length of the specimen figured in lateral view three-tenths of an inch ; length of 

 specimen A. a quarter of an inch. Both males. 



Locality. — March 15, 1874, 100 miles South of Australia ; lat. 39° 45' S., long. 

 140° 40' E. ; surface; surface temperature, 60°"2. Nine specimens. In these specimens 

 the shortness of the perseon, especially dorsally, and a somewhat more depressed habit of 

 body, with greater obliquity of the head, induced me for a long time to place them under 

 a separate specific name. 



March 16, 1874, 50 miles south of Australia; lat, 39° 22' S., long. 142° 27' E. ; 

 surface; surface temperature, 61°. Six specimens. 



April 28, 1876, North Atlantic; lat. 17° 47' N., long. 28° 28' W.; surface, night; 

 surface temperature, 73°. Seven specimens, shorter and stouter than those from the 

 waters south of Australia. 



From this same locality there were also obtained thirteen specimens probably 

 belonging to this species, but in a damaged condition, twelve of them having entirely 

 lost the third and fourth perseopods. 



