650 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



pendage, raised on a very slender peduncle. Secondary flagellum reach- 

 ing to the fourth segment of the primary, and composed of four segments, 

 of which the terminal one is very short. Penultimate segment of the 

 peduncle of the antenna about as long as the first segment of the pedun- 

 cle of the antennula ; ultimate segment slightly shorter ; penultimate 

 and antepenultimate segments furnished with long, plumose hairs 

 below and several fascicles of short, setiform hairs above. Flagellum 

 much longer than the flagellum of the antennula, very slender, and com- 

 posed of about fifty very elongated and somewhat flattened segments, 

 which have about the same proportions as in the flagellum of the 

 antennula, and are furnished with the same kinds of appendages. 



Epimera of almost exactly the same proportions and form as in P, 

 affiniSj and the first four margined with plumose hairs in the same way. 

 First pair of legs very nearly like those of P. ajjiais ; the palmary mar- 

 gin even slightly more longitudinal than in that species, continuous 

 with the posterior margin, and armed with two small obtuse spines near 

 the tip of the closed dactylus in addition to the setiform hairs. Second 

 pair of legs of the same form as in P. affinis, except that the palmary 

 margin is slightly concave and a little oblique in a proximal direction ; 

 the posterior margin furnished with fascicles of setiform hairs, as in 

 that species, and armed close to the palmary margin with three or four 

 small obtuse spines. Third and fourth pairs of legs like those of P. 

 affinis, except that the dactyli have each three setiform hairs near the 

 tip, being in this as in several other respects nearer P. Hoyi. Fifth and 

 sixth pairs of legs almost exactly as in P. affinis, exc^t the posterior 

 margin of the propodus in the sixth pair is armed with three pairs of 

 small spines. Seventh pair of legs having a few small spines on the 

 propodus, but otherwise as in P. affinis. 



Lateral margins of the first, second, and third segments of the abdo- 

 men with the angles rounded ; lateral margin of the third segment fur- 

 nished with a line of several submarginal, plumose setse near the ante- 

 rior angle, and behind them armed with five large and acute spines 

 directed backward, of w^hich four are in pairs near tbe middle of the 

 margin, and one alone near the posterior angle ; the posterior edges of 

 the lateral expansions of all three of the segments furnished with a, few^ 

 widely separated, plumose hairs. Peduncles of the first and second 

 I)airs of caudal stylets reaching to about the same point, a little beyond 

 the extremity of the sixth segment of the abdomen ; the outer rami 

 slightly longer than the inner, and those of the second pair of stylets 

 only a little shorter than those of the first. Rami of the posterior caudal 

 stylets longer than in P. affinis; the outer ramus rather more than 

 twice as long as the peduncle, narrow, and tapering to an obtuse tip, 

 both edges furnished with long plumose hairs, and the outer edge with 

 a sharp spine at the base of each hair. Telsou slightly longer than 

 broad, cleft half-way to the base, and each lobe tipped with two short 

 spinules and a plumose seta. There are two of the peculiar papilliform 



