NO. 3580 OSTRACOD FAMILIES — KORNICKER 9 



lamella below antennal sinus with 1 short bristle; outer surface of 

 each valve with scattered tapered hairs. 



Darby (1965 p. 64) states concerning the shell, "About six nodes 

 along the contact margin of both valves slightly dorsal to caudal 

 process." These nodes each contain a hirsute setae, and the nodes 

 are well-defined pores rather than raised structures (pi. li). 



Darby (1965, p. 64) reports 4 or 5 bristles on the inner lamella 

 behind rostrum, indicating variability in the number of bristles in 

 that area; only 4 bristles were observed in the examined specimens. 



Shell dimensions (in mm) are as follows (see table 2 for station 

 data) 



First antenna (figs. 4a-d) : First joint with spines along ventral mar- 

 gin; 2nd joint with dorsal bristle and marginal spines; 3rd joint with 

 1 ventral and 1 dorsal terminal bristle and marginal spines; 4th 

 joint with 1 subterminal dorsal and 2 terminal ventral bristles; 5th 

 joint with 1 long ventral, terminal sensory bristle with forked tip 

 and 2 proximal, ringed filaments; 6th joint minute and fused to 5th, 

 with 1 short spinous medial bristle; 7th joint reduced and fused to 

 8th joint, with 1 short spinous a-bristle, 1 medium b-bristle with 

 forked tip and 1 distal filament, and 1 long stout c-bristle with forked 

 tip and 2 proximal filaments; 8th joint reduced, with 2 long bare 

 d- and e-bristles, 1 long f-bristle with forked tip and 3 distal and 1-2 

 proximal filaments, and 1 long g-bristle ^vith forked tip and 1 distal 

 and 2 proximal filaments; 1st to 4th joints with rows of slender spines 

 on medial surface. 



Second antenna (figs. 4e,/) : Endopodite (fig. 4/) single jointed, vath. 

 long hirsute bristle and 2 short bare bristles. Exopodite (fig. 4e) with 

 9 joints: 1st joint slightly longer than total length of follo^g joints; 

 2nd to 9th joints trapezoidal, each joint smaller than preceding joints, 

 all without basal spines, 2nd to 8th joints with long bristles, bristle 

 on 2nd joint with spines and natatory hairs, bristles on 3rd to 8th 

 jomts with sparse natatory hairs and stout marginal spines near 

 middle; 9th joint ^vith medium spinous bristle and 2 long bristles 

 with natatory hairs; distal margins of 2nd to 8th joints ^^ith comb 

 of slender spines. Medial surface and anterior margin of protopo- 

 dite with clusters of slender spines. 



226-965—67 2 



