204 GAMMARIDjE. 



tolerably round, and black. The superior antenna? are 

 about half as long again as the head ; the peduncle is 

 just the same length as the flagellum, but the first joint 

 is longer than the other two ; the flagellum is about half 

 the length of the peduncle. The inferior antennae have 

 the peduncle quite as long as the superior antennae, the 

 last two joints being nearly of the same length, and 

 about three times the length of the preceding. The first 

 two pairs of legs are similarly formed, but differ con- 

 siderably in size, the second having the hand more than 

 twice as large again as that of the first; the wrist is in- 

 feriorly produced along the inferior margin of the hand ; 

 the hand is ovate, the palm occupying nearly the entire 

 length of the inferior margin, without its extent being 

 properly defined, the edge is furnished with a smooth 

 margin, fringed laterally with two sets of hairs, the 

 one directed anteriorly, with the tip suddenly directed 

 posteriorly into a hook ; the other, consisting of alter- 

 nate long and short hairs, directed backward, each being 

 furnished on the anterior margin with two small cilia; 

 the finger is curved, and armed on the inner margin 

 with a deeply -serrated edge. The next two pairs of 

 legs are more slender, and shorter than any of the 

 others. The last three have the thighs very oval, and 

 the fingers very long, straight, and styliform. The 

 penultimate pair of caudal appendages are shorter than 

 those that precede or follow it. The last pair have the 

 branches much shorter than the peduncle. The tail- 

 piece is oval, and subapically furnished with two simple 

 hairs. 



This animal was first taken by us, in company with 

 our valued friend Mr. T. P. Smyth, to whom we wish 

 to express our obligation for having frequently placed 

 his yacht at our disposal for dredging purposes. We 



