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vening sulci about fourteen on the upper-surface of the body- 
whorl; the posterior one and a-half whorls ornamented by 
arched retroverted transverse folds, the last whorl abruptly 
rounded at the periphery to the flattened base, which is incon- 
spicuously marked by concentric lineations. 
Aperture roundly oval, a little wider than high, its vertical 
plane oblique to the axis of the shell; peristome incomplete ; 
outer lip acute and medially ecurved; columellar lip nearly 
vertical, with truncated edge, and thickened at its junction with 
the basal lip. Umbilicai orifice of moderate size, but exposing 
the penultimate whorl; umbilical crater with somewhat precipi- 
tous sides interrupted by a shallow spiral furrow. 
Maximum diameter, 5; height, 2 mm. 
Lakes Entrance Gippsland, Victoria, in shell-sand. Three 
examples collected by, and received from, Dr. Pulleine. 
I am not satisfied that this new species is rightly placed in 
Cyclostrema or even in Cyclostrematide ; the oblique aperture is 
not proper to Cyclostrema, whilst the spiral excavation around 
the umbilical crater, which recalls Minolia in Trochide and 
Homalaxis in Solariide (at least as represented by the species in 
the Parisian Eocene) is not known among Cyclostrematide. But 
1 am at a loss where else to place it in the absence of characters 
which would be furnished by the animal or its operculum. 
Supplemental Note.—The following extract from a letter 
(25/9/99) by Mr. C. Hedley, is of much interest regarding the 
systematic position of this species :—‘‘ Your C’. caperatum I refer 
to the section Solariorbis of Teinostoma. The group is defined 
by Dall; briefly it is distinguished by an umbilical keel. The 
nearest ally of caperatum is Starkeye, N.S. Wales. <A glance at 
the umbilicus serves to distinguish them, that of the latter being 
more choked by the umbilical keel; besides caperatum is 
striated ; Starkeye smooth ; caperatwm absolutely larger and com- 
paratively flatter.” 
Cyelostrema charopa, spec. nov. Pl. vii., figs. 2a-2c. 
Cyclostrema micra, Petterd, Journ. Conch., p. 139, 1884 (non 
C. micra, Ten.-Woods, 1877). 
Shell minute, planorbiform, very widely umbilicated, sordid- 
white ; spire slightly sunken. Whorls four, rapidly increasing, 
convex ; last whorl with a sloping sutural margin ; the ornament 
consists of close-set, slender, oblique growth-lines only; base 
convex, abruptly bounding the wide umbilicus, which exposes all 
the whorls. Aperture incomplete, nearly circular, a little wider 
than high ; outer lip sharp, ecurved medially. 
Dimensions of figured specimen.—Minor diameter, 1:1; major 
diameter, 1:84 ; height, ‘5 mm. 
Habitat.—Tasmania (Petterd) ; South Australia (Dr. Verco). 
P 
