Late Cenozoic Ostracodes — Holden 
47 
Fig. 36. "Cythere” caudata Brady, 1890. a-d, Plesiotype usnm 648754; a, internal view of broken fe- 
male’s (?) right valve; adductor scars in white; b, dorsal line drawing of left valve; c, dorsal line drawing of 
right valve; d, internal hinge view, e—f, Plesiotype usnm 648755; e, right valve view of entire male (?) 
carapace; f, dorsal view. 
spect to its small oblong carapace and similari- 
ties in marginal areas and musculature. It lacks, 
however, the dentition characteristic of that 
family by having the median bar in the left 
valve instead of in the right, and by a unique 
tooth arrangement. Also, significant differences 
in the shape of the caudal process occur between 
"Cythere” caudata and the leptocytherids. 
The fossil specimen from T-l is longer than 
the living forms at HA. The long form is 
assumed to be the male. Hanai (1957:439) 
notes this type of sexual dimorphism in Lepto- 
cy there. 
Slight differences occur in Brady’s specimens 
from the Fiji Islands, but these do not appear 
to be important enough for specific differentia- 
tion. The greatest difference is size: Brady’s 
specimens are 0.46 mm in length, whereas the 
Hawaiian forms are much shorter. Also, the 
anterior margin of Brady’s form is more evenly 
rounded ; the anterior, in dorsal view, more 
acuminate. Keij’s (1954) illustrations appear 
much like the Hawaiian specimens, with the 
exception of internal features. 
REFERENCES 
Alexander, C. I. 1929. Ostracoda of the Cre- 
taceous of North Texas. Texas Univ. Bull. 
2907, 137 pp., 10 pis. 
Baird, Wm. 1845. Arrangement of the British 
Entomostraca, with a list of species, particu- 
larly noticing those which have as yet been 
discovered within the bounds of the Club. 
