REPORT ON THE COPEPODA. 71 



elongated abdomen and tail are characters of sufficient importance to demand ovum,. 

 recognition. In the very largely developed posterior foot-jaw there is a resemblance to 

 Candace. 



1. Corynura gracilis, n. sp. (PL XXXIII. figs. 1-14). 



Length, 1— 12th of an inch (2 - l mm.). Abdomen slender, very much narrower than 

 the cephalothorax (fig. 1), head marked by a deep transverse groove. Anterior antenna? 

 slender, not quite as long as the body ; fifteen-jointed (?) somewhat nodose and furnished 

 with rather long setae, — sparsely, except at the apex, which bears a brush of five or six 

 long, and, in the male, finely plumose hairs. Two joints on the proximal, and one on 

 the distal side of the hinge joint in the male, are very finely denticulated, and in the 

 middle of the swollen portion of the limb is a strong, deflexed, marginal tooth; the last 

 denticulated joint also has a spine at the apex. Inner branch of the posterior antenna 

 (fig. 5) of moderate length. Mandible (fig. 6) deeply and sharply toothed, the teeth 

 densely ciliated, palp bearing two short, one-jointed branches. Basal portion of the 

 maxilla (fig. 7) stout, bearing a series of eight or nine ciliated setae, apical portion simple, 

 with three curved terminal setse. Apical portion of the posterior foot-jaw (fig. 9) very 

 indistinctly three-jointed, rudimentary, feebly setiferous at the extremity. Swimming 

 feet like those of Acartia, except that the marginal spines are distinctly articulated to the 

 limb. Fifth pair of feet in the female (fig. 12) simple, two-jointed, the last joint curved, 

 awl-shaped, slightly dentated at the apex ; in the male strongly hooked and prehensile. 

 The tail is very long, constricted at the base (figs. 13, 14) and, in the female dilated 

 and spathulate at the apex ; in the male it is slender, dilated at the apex, but without 

 any marked basal constriction ; there is a ,small marginal hair on the middle of each 

 caudal stylet ; the terminal setse are much shorter than the abdomen and BubequaL 



Habitat. — This remarkable species was found in four gatherings from near the Philip- 

 pine Islands, in all cases rather sparingly. 



The jointing of the anterior antennse, especially near the base, is very indistinct, and 

 it is impossible, from spirit specimens at any rate, to state with accuracy the number of 

 the joints. The same remark applies very frequently to Pontella and other allied genera. 



2. Corynura barbata, n. sp. (PI. XXXI. figs. 10-12). 



Female.- — Like the preceding, except that the caudal stylets (fig. 12) are shorter and 

 stouter, and have a long seta on the middle of the external margin. The anterior 

 antennae are very obscurely jointed, and the fifth pair of feet (fig. 11.) are unequal in 

 size, the larger one angularly produced in the middle, and bearing on the projection a 

 shaggy setose fringe. 



