28 
RECORDS OF THE AUSTRALIAN MUSEUM. 
The reproductive system of this form seems to me to be 
especially worthy of attention. Branching from the vagina, 
opposite to the entrance of the duct of the sperm atheca, is a 
gland of unknown function, marked X in the accompanying 
illustration (PI. v. fig. 13); this exactly corresponds to the gland 
marked x in Semper’s illustrations of the genitalia of falconeri 
and dufresni , and also to the gland marked v. p. in the figure of 
the genitalia of cunninghami published by the author. It will 
be observed that Semper’s drawings show a short, wide, recurved 
duct, and mine a narrow, subcylindrical one. On referring to a 
sketch of the organs of dufresni , which I took some time ago, I 
notice that the gland in question appears of the form observed 
in cunninghami and atornata ; possibly each form may be proper 
to different periods of gestation. No other Australian helices are 
known to possess such an appendage, and its value as a means of 
classification cannot be denied. The musculature, which is shared 
by the species with which I would associate atornata , is also 
peculiar. The retractor muscle of the penis is not attached to 
the floor of the pulmonary cavity as in some helices, but is 
a broad band arising from the main retractor muscle of the 
columella. The narrow subcylindrical portion of the penis sheath 
extending from the insertion of the retractor muscle to the origin 
of the vas deferens, is also strictly analogous to the similar 
portions of cunningliami , falconeri and dufresni . The ovo-testis 
is a compact, yellow, bi-lobed body, not ramifying through the 
lobes of the liver. 
The jaw (PL v, fig. 11) is 4i- mm. long, smooth, boomerang- 
shaped, ends tapering to a blunt point, cutting margin with 
a slight median projection. 
The radula (PI. vi. figs. 14, 15) measures 10x3 mm., is strap- 
shaped, formula, 185 rows of 45 : 22 : 1 : 22 : 45. ; the rachidian 
is single, narrow, about the length of its base, sagittate at the 
root, slender in the stem, lanceolate at the apex, basal plate 
expanded posteriorly ; laterals more bulky than the rachidian, 
unicuspidate, broadly ovate, apex acute, projecting past the basal 
margin, alate angle slightly expanded ; the remoter laterals pass 
gradually into the marginals, w r hich are characterised by single, 
entire, oval, much inclined cusps. 
The classification of this species hitherto accepted seeming to 
the writer in disaccord with its real relationships, he would prefer 
to intercalate it among other Australian snails as follows : — 
Family Helicid^:. 
Foot fiat, pointed, without mucous gland or pedal line ; mantle 
without appendages ; tentacles long and tapering. 
