78 Carl Bovallius, The Oxycephalids. 



considerably broader than, that in the preceding pair, and almost as long 

 as the four following joints together; the upper hind corner is much dilated, 

 and the apex is produced behind the genu, forming a broadly rounded 

 process which reaches to the apex of the genu; the tibia is nearly as 

 long as the three following joints together; the front margin is fringed 

 with a row of equal, long, spine-like teeth; the front margin of the meta- 

 carpus shows longer and shorter hair-like bristles, not disposed in 

 regular, come-like groups as in Dovycephalus amhobus; the dactylus is a 

 third part as long as the metacarpus. The seventh pair (PI. II, tig. 18) 

 are a fourth part shorter than the femur of the sixth; the cai-pus is 

 somewhat longer than the metacarpus; the dactylus is not fully half as 

 long as the metacarpus. 



The jyleon in the male is a little shorter than the last six peryeonal 

 segments together; in the female it is a little shorter than the last five. 



The first pair of uropoda (p. 38, fig. 73) reach to the apex of 

 the last pair, but do not attain the apex of the telson; the peduncle is 

 about nine times as long as broad, a little more than twice as long as 

 the outer ramus, and quite as long as the last coalesced ural segment; 

 it is finely pectinated along the inner margin, and coarsely serrated 

 along the lower half of the outer; the outer ramus is elongated, sharp- 

 pointed, more than four times as long as the inner, coarsely serrated 

 along the outer margin, and finely pectinated along the inner; the inner 

 ramus (p. 39, fig. 77) is lanceolate, serrated along both margins. The 

 second pair reach to the middle of the inner, ramus of the last pair; 

 the peduncle is about seven times as long as broad, more than twice as 

 long as the inner ramus, and armed on the margins as that of the first pair; 

 both rami are elongated and sharp-pointed; the inner is serrated on both 

 margins, the outer ramus is serrated on the inner margin and smooth on 

 the outer. The third pair do not reach to the apex of the telson; the 

 p-eduncle is half as long as the inner ramus, which is strongly serrated 

 along the inner margin and almost smooth on the outer; the outer ramus 

 is shorter than the peduncle, almost styliform, serrated on the inner 

 margin and smooth on the outer. 



The telso7i is elongate-triangular, sharp-pointed, nearly half as 

 long as the last coalesced ural segment, and about three times as long 

 as it is broad at the base. 



COLOTIR. White, almost hyaline, sprinkled with red. 



Length. 10 — 1.8 mm. 



Hab. The subtropical region of the Atlantic. 



