86 



DISCOVERY REPORTS 



Gnathopod i , 6th joint shorter than 5th. Gnathopod 2, 6th joint about half length of 

 (dorsal margin) 5th. 



Peraeopods 1 and 2, dactyls a little longer than 6th joint, peraeopod 2 strongly setose 

 on hind margin. Peraeopod 3, 2nd joint similar to that of gaimardi (Sars, pi. lxiv) with 

 distal groove for reception of 2nd joint of peraeopod 4, anterior margin not setose, 5th 

 joint with transverse rows of spines, hind apex acutely produced nearly half-way along 

 6th joint, which is abruptly narrower and slightly produced on anterior apex. Peraeopod 4, 

 2nd joint broadly pyriform, hind margin slightly emarginate distally, anterior margin 

 not strongly convex, with thick fringe of short plumose setae ; a series of long plumose 

 setae arise from a longitudinal ridge on inner surface. Peraeopod 5, 2nd joint produced 

 in a long narrow lobe extending to end of 5th joint, upper margin slightly concave, 

 lower margin setose right round to insertion of 3rd joint, setose on inner surface, 4th 



Fig. 40. Byblis antarctica, Schell. a. Side-plates 2-4. b. Pleon segments 3-6. 

 c. Telson. d. Peraeopod 4. e. Peraeopod 5 (inner surface). 



and 5th joints broad, the latter with a few spines arranged in transverse rows, 6th 

 abruptly narrower, linear, dactyl spiniform. 



Uropod 1 extending slightly beyond uropod 2, rami acuminate, inner slightly shorter 

 than outer, with a few spinules on upper margin, peduncle with strong apical spine. 

 Uropod 3 extending only slightly beyond the others, rami shorter than peduncle, short, 

 lanceolate, with a few spinules on margin. 



Branchial lamellae simple. 



Remarks. This species is clearly distinguished from the other species by the 2nd 

 side-plate and the telson. 



Byblisoides, Brnrd. 

 Barnard, 1931, p. 426. 



Head with post-antennal angle very distinct, pushed forward, so that bases of 2nd 

 antennae are closely juxtaposed to those of 1st antennae. No corneal lenses; ocular 

 pigment not visible. Side-plates 1-4 sloping forwards, 4 obliquely truncate below 

 posterior corner. Telson ovate, longer than broad, cleft nearly to base. 



