Late Cenozoic Ostracodes — Holden 
45 
nal scar anterior to top two adductor scars; 
characteristic xestoleberid arcuate scar in antero- 
dorsum. Deep anterior and posterior vestibules 
ventrally located; radial pore canals simple, 
normal pores small, sparse. 
dimensions: 
PLESIOTYPE 
usnm 648767 
LENGTH 
WIDTH 
HEIGHT 
(entire) T-12 
SDNH 1064 
0.57 
0.40 
0.35 
(right valve) T-12 
usnm 648768 
0.57 
0.42 
0.40 
(entire) T-12 
usnm 648769 
0.64 
0.44 
0.42 
(left valve) T-12 
usnm 648770 
0.62 
0.27 
0.39 
(entire) T-12 
0.57 
0.38 
0.35 
distribution: As 
fossils 
from 
T-l (3 
valves), T-2 (4 valves), T-4 (2 valves; 1 en- 
tire), T-7 (2 valves), T-8 (3 valves), T-ll 
(4 valves; 3 entire), T-12 (56 valves; 3 en- 
tire), AR (2 valves; 1 entire), and S-23 (5 
valves) ; found living from HA (1 valve) and 
T-13 (1 valve). Reported by Brady (1880) 
off Tongatabu (station 172) in the Friendly 
Islands. 
discussion: The collection consists mostly of 
immature instars. Those described by Brady 
(1880:126) are considerably smaller (length 
0.45 mm) than those dealt with here. Dr. R. 
H. Bate (personal communication) of the 
British Museum (Natural History) made com- 
parisons of the Hawaiian specimens with 
Brady’s types and found that Xestoleberis nana 
Brady, from the Friendly Islands, although 
smaller, is more similar in shape to the adult 
fossil specimens from the Hawaiian Islands 
than to their young of the same size as Brady’s 
types. 
Suborder and family uncertain 
Genus Anchistrocheles Brady and Norman, 
1889 
Anchistrocheles fumata Brady, 1890 
Figs. 35 a-c 
Anchistrocheles fumata Brady, 1890. Trans. 
Roy. Soc. Edinburgh 35, p. 497, pi. 3, figs. 
13-14. 
diagnosis : Anterior margin oblique, pos- 
teroventrally sloping ; dorsal margin nearly 
straight. 
description: Carapace smooth, laterally com- 
pressed, length about 3-J- times the width. In 
lateral view: dorsal margin gently arched, al- 
most straight ; anterior margin subtruncate, 
sloping obliquely downward and backward; 
posterior margin broadly and evenly rounded; 
ventral margin concave at inturned area; left 
valve larger, overlapping right valve around all 
margins. In dorsal view: carapace lenticular; 
ends pointed. Moderate duplicature present ; 
other internal features not preserved. 
DIMENSIONS: 
PLESIOTYPE 
usnm 648749 
(entire) T-12 
SDNH 1065 
(left valve) T-12 
usnm 648750 
(young left valve) 
LENGTH 
WIDTH 
HEIGHT 
0.61 
0.11 
0.30 
0.59 
0.08 
0.31 
! 0.45 
0.10 
0.27 
distribution: As fossils from T-12 (3 
valves; 1 entire). Reported by Brady (1890) 
as living in shore pools at Lufi-lifi, Samoa. 
discussion: In every respect, the individuals 
from T-12 resemble those of Brady (1890: 
497) from Samoa. The species was reported by 
Brady from only one location in the intertidal 
zone, but whether it is exclusively restricted to 
that zone is unknown. 
Genus uncertain 
” Cythere” caudata Brady, 1890 
Figs. 36 a-f 
Cythere caudata Brady, 1890. Trans. Roy. 
Soc. Edinburgh 35, p. 497. 
Cythere? caudata Brady. Keij, 1954, Koninkl. 
Nederl. Acad, van Wetenschappen, Amster- 
dam, Ser. B., vol. 57, pt. 3, p. 362, pi. 3, fig. 1. 
description: In lateral view: carapace small 
(length of adult male(?) 0.4l mm), densely 
ornamented with oblong reticulations, whose 
long axes generally coincide with that of cara- 
pace length; dorsal margin straight; anterior 
margin dorsally flattened ; ventral margin gently 
concave; posterior with a low, pointed, unor- 
namented, laterally compressed caudal process; 
broad unornamented eye spot beneath anterior 
