142 BRITISH COPEPODA. 



1. NOTOPTEKOPHORUS PAPiLio, Hesse. PI. XXXI, figs. 



312. 



Notopterophorus papilio, Hesse. Ann ales des Sciences Naturelles 

 (1864), ser. 5, Zool., tome i, p. 338, pi. xi, 

 figs. 1 13; vol. iii, p. 221 (1865). 



The animal is composed of a slender body, on the 

 dorsal aspect of which the delicate membranous 

 integument is produced into six (Hesse) large bifur- 

 cated wing-like expansions (figs. 3, 4). The antennae 

 are very like those of Doropygus ; the anterior (fig. 5) 

 are 10-jointed, the first two joints being very large, 

 the rest very much narrower and shorter, and tapering 

 gradually to the apex ; the posterior are 3-jointed 

 (fig. 6), the joints successively decreasing in size from 

 the first ; terminal claw small. Mandible well 

 developed (fig. 7) ; basal joint of the palp large, 

 secondary branch small, 1 -jointed. Inner branch of 

 the first pair of feet (fig. 1 1) 2-jointed, shorter than 

 the outer branch ; the first joint short ; second joint 

 of the outer branch very short. Fifth pair appa- 

 rently absent. Caudal segments of moderate length, 

 cylindrical, tapering, and armed at the apices with 

 four small hook-like spines (fig. 12). " Colour of the 

 head white, of the occiput, the first two abdominal 

 segments, and the eye purplish-red ; the rest of 

 the abdomen yellow, and the intestinal tube black, 

 thorax apple-green ; feet and membranous expansions 

 white." Length ^th of an inch (5 mm.). 



