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



43' W. (Station 299), this Station being off the west coast of South America, in the 

 latitude of Valparaiso; and in lat. 5° 28' N., long. 14° 38' W. (Station 349), the last-named 

 Station being in the Atlantic, a little south-west of Sierra Leone. 



Phyttopus, 1 n. gen. 



Anterior antennae twenty-four-jointed. Maxilla-palp rudimentary. Inner branches 

 of all the swimming feet three-jointed (?) Fifth pair in the male (?) one-branched, the 

 last joint leaf-like. 



Phyllopus bidentatus, n. sp. (PI. V. figs. 7-16). 



Length, l-7th of an inch (3 '6 mm.). Anterior antennae (fig. 7) having the joints from 

 the eighth to the twelfth very short, only about half as long as broad, seventh, ninth, 

 and fourteenth joints each bearing a single very long seta, the rest having short setae, 

 except the terminal one, which bears a lash of four setae, two of them longer than the 

 rest ; the first joint is armed close to its origin with a long and slender curved spine, and 

 all the shorter setae of the limb are very straight and rigid, very obliquely truncate at the 

 tips, the longer margin being produced into a short, extremely delicate filament, 

 the whole having much the appearance of the nib of a quill pen ; the last five joints 

 are very much dilated at the apices, — more so than is represented in the figure. 

 Mandibles (fig. 8) slender, divided at the apex into five long, slender teeth ; palp 

 having a large wedge-shaped base and two branches, one of which has two, the other 

 four joints. The maxilla-palp (fig. 9) consists of a small ovate plate bearing six setae, 

 and a small two-jointed, setiferous digit. Anterior foot-jaw (fig. 10) stout, its marginal 

 processes stout and triangular; posterior (fig. 11) small, the basal joint dilated. The 

 last joint of the fifth foot (fig. 12) forms a leaf-like lamina, with deeply serrated margin, 

 the innermost serration produced and larger than the rest ; the penultimate joint bears 

 on its inner margin a long, stout seta. Abdomen four-jointed, the first joint much 

 stouter and longer than the rest (figs. 13, 14); caudal stylets about twice as long as 

 broad ; second tail-seta longer than the abdomen, the rest about half as long. Terminal 

 spines of the swimming feet lancet-shaped (fig. 15), margin very finely pectinated. 

 Rostrum (fig. 16) very short, bifid. Last thoracic segment (fig. 13) produced ventrally 

 into a stout bidentate process. 



Habitat.— Lat. 36° 44' S., long. 46° 16' W., down to 2650 fathoms (Station 325). One 

 specimen only of this animal was seen, and in the anticipation of further specimens being 

 available, was unfortunately only very imperfectly examined. The size of the first 



1 (pvhMv, a leaf ; Troug, a foot. 



