PARASITIC COPE PODS— WILSON. 



387 



contains only a single joint; the abdomen is entirely concealed beneath 

 the genital segment, and there is not even a trace of any sixth seg- 

 ment. The egg-tubes come out of the posterior lobes of the genital 

 segment, behind the tips of the anal laminae. 



The male is even more wondei-fidly made; he possesses five free 

 thorax segments in front of the genital segment, but there are only 

 two pairs of swimming legs for the entire five segments. 



The first antenniP are three-jointed, the second pair four-jointed; 

 the maxillie are five-jointed and terminate in a stout claw. The 

 mouth-tube is jointed twice, and the three 

 parts are of different diameters; the eyes 

 are triangular. The swimming legs are all 

 biramose and the rami are one-jointed, as 

 in the female, while each anal lamina is 

 furnished with a large sucker on its base, 

 close to the anus. 



Of course such a description takes away 

 all possibility of locating the species accu- 

 rately; the only thing we can afhrm with 

 certainty is that the species does not be- 

 long to the genus Dinematura, where Hesse 

 has placed it. The size and shape of the 

 female's body, especially when seen in dor- 

 sal view, suggests strongly the genus Demo- 

 leus. But the male is a perfect enigma, in 

 view of which we are obliged to leave the 

 species unlocated and await further infor- 

 mation. 



Fig. 15.— Dorsal view of a fe- 

 male Pandarus sinuatus, show- 

 ing THE PARTS OF THE BODY. 



Genus PANDARUS Leach. 



Pandarus (P. bicolor) Leach, 1816, p. 405. 



Female. — Body an elongated oval or 

 elli])se; cephalo thorax semielliptical, usu- 

 ally narrowed anteriorly, and covered with 

 a smooth carapace destitute of grooves; 

 posterior lobes short, the margin between them armed with teeth or 

 spines, or sometimes sinuate (fig. 15.) Eyes usually invisible in the 

 adult, but visible in the young. Free thorax segments each furnished 

 with a pair of dorsal plates, which are stiff and rigid, elytra-form; those 

 on the second segment are lateral, the others median, the third pair 

 overlapping to a greater or less extent the genital segment. This lat- 

 ter is considerably enlarged, elliptical, or sometimes narrowed posteri- 

 orly and prolonged backward into lobes at the posterior corners. The 

 dorsal surface of this segment is hardened like the carapace, and in 

 most species gives evidence of being a fusion of two plates, like those 



