CUSHMAN: VINEYARD SOUND OSTRACODA. 
369 
pairs of feet directed forwards, usually very similar, increasing in 
length to the posterior ones, ends fitted with stout claws for crawling; 
postabdomen rudimentary; copulatory organs of male large and 
•complicated. 
Genus Cytherois W. Muller. 
Paradoxostoma Sars, ’66, p. 91; Dahl, ’88, p. 629. In part. 
Cytherois W. Muller, ’84, p. 15; G. W. Miiller, ’94, p. 309; Brady and Norman, 
’89, p. 227. 
Shell thin, elongated, without sculpture; antennulae long and 
slender, second joint longer than any of the others; antennae 5- 
jointed, the last joint with a strong claw, flagellum 3-jointed; feet 
small and slender, joints 2 to 4 of third feet hairy on the anterior 
border. 
Cytherois zostericola sp. nov. 
PI. 31, fig. 35-41. 
Shell, seen from the side, elongated, oval, width nearly equal to 
half the length; surface smooth, shell yellowish white. 
x\ntennulae with three short setae from the middle of the second 
joint; at the end of the penultimate joint a group of three setae on 
one side with a single seta on the other; last joint with four slender 
setae. Jaw of mandible with one large tooth and indications of three 
smaller ones. 
Length 0.5 mm. 
Habitat .— Collected in the Eel Pond, Wood’s Hole, July 15, 1905, 
in exactly the same place that Pontocypris edwardsi was taken later 
in the summer. The species was not met with at any other locality 
nor in any of the dredgings. 
Genus Xestoleberis Sars. 
Xestoleberis Sars, ’66, p. 66; Brady, ’68, p. 437; ’80, p. 124; G. W. Muller, 
’94, p. 332. 
Shell smooth and polished, ornamentation consisting of scattered 
