REPORT ON THE COPEPODA. | | ;, 



4. Corycceus venustus, Dana (PI. LIV. figs. 8-10). 



Corycceus venustus, Dana, Crust. U. S. Expl. Exped. (1852), p. 12:22, pi. lxxxvi. fig. U ,/. 

 „ huxleyi, Lubbock, On some Oceanic Entomostraca, &c, Trans. Linn. Soc, vol. xxiii. 

 p. 182, pi. xxix. figs. 8, 9. 



Length, l-12th of an inch (2-1 mm.). Cephalothorax broad and scarcely narrower 

 behind than in front ; lateral processes of the third segment long, acute, and somewhal 

 spreading : ahdomen constricted at the base, and only half as long as the cephalothorax : 



caudal segments (fig. 10) generally more or less divergent, and equal to about half or 

 three-quarters of the length of the abdomen ; terminal setae three, the innermost flexuous, 

 slender, considerably longer than the furca, the second about half as long, stouter, and 

 rigid; outermost still shorter and hair-like ; a small marginal seta slightly removed from 

 the apex. Terminal claws of the posterior antennae (fig. 9) reaching not much beyond 

 the middle of the hand, strongly hooked at the apex, and having a small hooked 

 marginal spine at their attachment to the last joint of the limb. 



The generally smaller size of the animal, the shorter and stouter caudal segments, the 

 comparatively small and very strongly falcate claws of the posterior antennae, are the 

 characters which chiefly distinguish this species from Corycceus varius. The following 

 list of localities includes all of which I have record, but the species certainly occurred in 

 some others, of which I have no note, owing to my failure at first to recognise it as a 

 distinct specific type. 



Habitat. — Between Sydney and Wellington ; between Api and Cape York ; in five 

 gatherings from the Philippine Islands ; in kit. 3° 10' N., long. 14° 51' W. (Station 34s) ; 

 and in lat. 26° 21' N., long. 33° 37' W. (Station 353). 



5. Corycceus sj)eciosus, Dana (PI. XLVI. figs. 5, 6). 



QoryccBUS speciosus, Dana, Crust. TJ. S. Expl. Exped. (1852), p. 1220, pi. lxxxvi. fig. 1, a-d. 



Length, l-10th of an inch (2 - 55 mm.). Animal elongated and slender, forehead 

 narrow and rounded; thorax slightly constricted in front and wider behind, spines 

 directed straight backward, and reaching as far as the hinder edge of the first abdominal 

 segment; caudal stylets divergent, as long as the abdomen, and excessively slender. 

 Anterior antennas clothed with numerous seta', most of which are at least twin- as long 

 as the limb itself. Eyes large, remote, situated near the sides of the hi ad. 



Corycceus speciosus was found in the tropical Atlantic, in lat. 1° 47' X., long. 

 24 2G' W. (Station 10G). Dana's specimens (two only) were taken not far from tic- 

 same place, and though the description gives the anterior antennse as seven-jointed, I 

 not doubt that the same species is meant. 



