South .4 list rail cm S h ells . 
November, 1932 . 
JO. 
Gulf St. Vincent). Very variable. May be very attenuate, or 
comparatively wide; uniformly tapering or posteriorly spindle- 
shaped; valid or obsolete spiral ribs; last whorl may be 
very ventricose; cingula usually nearly equal, but the central 
one may be more developed and the suture may be wide, deep, 
and distinct. 
C- diaphana Verco 1906. “The Diaphanous Cingulina.” 
Thin, diaphanous, conical; white; spiral lirae, seven, valid, scab- 
rous from microscopic growth striae, obliquely receding from the 
suture; protoconch asymmetrical, smooth; adult whorls six, med- 
ially keeled; body-whorl with a stouter lira at the periphery and 
a deeper groove below it, and seven basal lirae; base sloping; 
suture well marked, slightly channelled; mouth slightly con- 
tracted above, and narrowly effuse below; outer lip simple; inner 
lip complete.Height 2.1, diam. .7 mm. Henley Beach (Type 
locality, ), also dredged Gulf St. Vincent. 
C- magna Gatliff & Gabriel 1910. “The Large Cingulina.” 
Gradually tapering, shining; uniform creamy-whitc; spiral 
grooves, irregularly spaced, narrow, shallow, six on the penulti- 
mate whorl, gradually fading out on the earlier whorls; proto- 
conch of two turns, smooth, the apex small, asymmetrical; adult 
whorls nine, slightly convex, the earlier ones transversely pucker- 
ed at the shoulder; suture incised; base rounded; mouth pyriform; 
outer lip thin; continuous to w-hcre it joins the columella, slightly 
reflected at the junction. Height 10.5, diam. 2,75 mm. Gener- 
ally distributed, but not common, beach and down to 130 fathoms. 
(Type locality — Western Port, Vic.). 
OBELISCIDAE- 
Turreted, axis plicate; outer lip frequently internally liratc; 
in the larger forms the mouth is obscurely channelled in front; 
larvel shell sinistral, the adult dextral; protoconch frequently 
set at an angle to the adult axis, or more or less immersed in 
the adult apical whorls; sculpture, when present, ribbed, spirally 
sulcate, or reticulate; coloration, when present, usually reddish, 
brownish, or yellow; operculum ovoid, paucispiral, with anterior 
apex, a thread-like arcuate ridge on the outer side, the inner 
margin notched in liarmony with the folds of the columella when 
present. Distribution — ^World-wide, the larger forms mostly 
tropical. Fossil — Cretaceous, numerous in the Tertiary, but per- 
haps most fully developed in the existing faunas. Animal with 
two flattened, subtriangular or elongate tentacles, grooved or 
auriform in the larger forms, the funicles with a ciliated area; 
below the tentacles an oral orifice, from which extends a long, 
