178 University of California Publications. | ZooLoGy 
as the joint. Fifth foot 3-jointed and with three rather long 
bristles on end joint (fig. 35c). 
© a 
Fig. 35.—Metridia lucens and M. boeckii. (a) M.l., female, lateral, 20. 
(b) M.1., second basal and first joint of inner ramus of second 
foot of female to show hooks, K195. (c) M.L, fifth foot 
of female X195. (d) M.b., fifth foot of female 195. 
4 Grasping antenna on right side. Fifth foot: second joint 
of outer ramus of left foot without, first joint of outer ramus 
of right foot with a long, thorn-lke bristle. 
Length: Female, 3.2 mm. 
Occurrence: Very common, summer and winter. 
2. Metridia boeckii Giesbrecht. 
Metridia boeckii Giesbrecht, 1889, p. 5; 1892, pp. 340, 346, pl. 33, 
figs. 8, 19, 31, 37; 1898, p. 107. ; 
2 Like M. lucens, but furca is as long as the fifth abdominal 
segment, and twice as long as broad. Anterior antennae reach 
a little beyond the posterior border of the thorax. Fifth foot 
with four joints (fig. 35d). 
& Unknown. 
Length: Female, 2.5 mm. 
Occurrence: One or two in catches with MW. lucens. 
