64 
M. T. WARNE 
Description. Carapace moderately thick, almost 
equivalved except that LV strongly overlaps RV 
dorsally. Dorsal margin straight, reaching 
slightly over half maximum length in both 
valves. Maximum length at mid-height; maxi¬ 
mum height anterior to mid-length; maximum 
width at mid-length and slightly above mid¬ 
height. Outline in dorsal view oval. Surface 
ornament consisting of faint pentagonal 
network of furrows giving carapace a scaly 
appearance. Normal pore canals large, simple 
and scattered. Inner lamellae relatively broad 
with small vestibules developed in ventral 
region of both valves. Marginal pore canals not 
seen. Hinge simple, smooth and adont, thicker 
terminally than in mid-section. Adductors con¬ 
sisting of three subtriangular to subrounded 
scars in a tight cluster at position of maximum 
width. Posterior and dorsal adductor scars div¬ 
ided in some specimens. Sexual dimorphism not 
detected. 
Remarks. This species is distinguished from P. 
melbournensis by its impressed rather than 
raised ornament and by its distinctly different 
shape. Specimens of P. warneetensis with div¬ 
ided adductors have a similar muscle scar pat¬ 
tern to Micropolycope paramushiri (Chavtur, 
1977) but are otherwise quite different. I pre¬ 
viously (Warne 1987) attributed to this species 
some poorly preserved juvenile specimens from 
the Sherwood Formation, but I now consider 
that these cannot be definitively assigned to P. 
warneetensis. 
Age and stratigraphical range. Recorded only 
from the late Late Miocene or Early Pliocene 
(Cheltenhamian or Kalimnan) “Warneet 
Sands” (Warne, 1987). 
Polycope sp. A 
Figs 1C, 2L 
Polycope sp. 4.—Warne 1987: 441. 
Material. Five disarticulated adult and juvenile valves 
from the Fyansford and Sherwood Formations. 
Dimensions. LV, NMV PI22200: L = 0.38 mm, H = 
0.32 mm. 
Description. Carapace of medium size, relatively 
thick- shelled, irregularly rounded and produced 
anteroventrally. Dorsal margin gently arched. 
Maximum length slightly below mid-height; 
maximum height and width at mid-length. 
Strong reticulate ornament comprising six con¬ 
centric rows between ventral margin and muscle 
scar region, not as well ordered elsewhere on 
carapace. Denticulate anteroventral margin. 
Hinge short, smooth and adont. Inner margin 
narrow with no vestibules evident. Adductors 
consisting of three subrounded scars in a tight 
subtriangular cluster located at position of maxi¬ 
mum width. Normal and marginal pore canals 
not seen. Sexual dimorphism not detected. 
Remarks. This is a distinctive species but adult 
left and right valves have only been found in 
separate samples. It differs from P. sancta- 
catherinae in lacking distinct ribbing. The re¬ 
ticulation is coarser than in P. orbulinaeformis 
Breman (tentatively placed in Archypolycopeb] 
Chavtur, 1981). 
Age and stratigraphical range. Recorded only 
from the early Middle Miocene (Balcombian to 
early Bairnsdalian, foraminiferal zones N8/9- 
N10/11) clays of the Fyansford and Sherwood 
Formations. 
Genus Polycopsis Muller, 1894 
Type species. Polycope compressa Brady & Robertson. 
1869. 
Polycopsis? sp. A 
Figs IF, 2G 
Material. One adult valve from the “Warneet Sands” 
at the same locality as the types of Polycope 
warneetensis. 
Dimensions. RV, NMV PI22201: L = 0.55 mm,H = 
0.48 mm. 
Remarks. The carapace is large, smooth, 
rounded in lateral view and has a weakly de¬ 
veloped anterior rostrum. The species is similar 
to Poly cope quadridentata Bonaduce et al., 1975 
in shape and in being compressed laterally in 
dorsal view, but it is larger and lacks marginal 
denticulation. The adductor muscle scarpattem 
is obscure, and so the possibility that the species 
belongs to Metapolycope cannot be dis¬ 
counted. 
Age arid stratigraphical range. Recorded only 
from the late Late Miocene or Early Pliocene 
(Cheltenhamian or Kalimnan) “Warneet 
Sands” (Warne, 1987). 
