A revision of the Australian fossil species of Zoila (Gastropoda: Cypraeidae) 
9 
Figure 4. A-F, Cypraeorbis medius MNHN, Bartonian, late Eocene, Bois du Rois, Auvers sur Oise, France; A-C, D-E, x 1.5; F, x 2. 
Remarks. The small size and the massive development of the 
anterior and posterior rostra separate this species from all others 
in the genus. In morphology, it comes closest to Zoila mulderi 
(Tate), but it has a massive anterior rostrum lacking in Z. mulderi 
and the posterior rostrum is not notched as it is in Z. mulderi. 
Etymology. Greek, didymos, double; rhynchos, snout. 
Zoila glomerabilis sp. nov. 
Figures 6F-H, 7A-F 
Description. Shell of large size for genus, solid, globosely 
pyriform, abruptly contracted anteriorly to short, narrow 
anterior canal. Spire projecting slightly, almost entirely 
enveloped by last whorl, covered with thick callus. Posterior 
canal short, deeply incised, reflexed to the left. Anterior canal 
deeply incised, with rounded sides, reflexed dorsally, supported 
laterally by very short, narrow flanges. Aperture sinuous, 
slightly widened and sloping steeply inwards before anterior 
canal. Outer lip with 28-36 teeth extending along entire lip; 
inner lip with 15-32 teeth extending along entire lip on most 
specimens; weaker posteriorly on some specimens and on few 
specimens extending only along half of lip. Fossula well 
developed, broad, relatively deeply depressed, bounded 
anteriorly by weak terminal ridge. 
Dimensions. 
L 
W 
H 
LT 
CT 
Holotype PI4515 
96 
59 
52 
35 
30 
Paratype P308740 
85 
52 
40 
35 
26 
Paratype P315526 
80 
50 
42 
33 
13 
Type locality. Lower beds of section south of Fishermen’s 
Steps, Bird Rock Cliffs, Torquay, Victoria. Jan Juc Formation. 
