30 
RECORDS OF THIS AUSTRALIAN MUSEUM. 
falconer i ; figs. 23, 24, 25, ditto dufresni; Pi. xv. fig. 14, ditto 
rnelo ; Pl. xvi. fig. 7, radu la of* dufresni; lig. 10, ditto falconer i ; 
PL xvii. fig. 13, ditto mdo; Proc. Roy. Soc. Queensland, VI., 
PL iii. jaw, radula and genitalia of (yunninghami ; PL xiv. jaw 
and radula of mastersi ; P.L.S., N.S.W. (1) III PL vii. fig. \a, 
egg of dufresni; op. cit. (2) VI. PL ii. fig. 1, jaw of dufresni; figs. 
2, 3 and 4, jaw, radula and genitalia of tasmanicus ; figs. 5, 6 
and 7, jaw, radula and genitalia of launcestonensis. 
Should a lens be applied to the summit of a fresh specimen of 
any of the species enumerated above, the apex (PL v. fig. 10) will 
be seen to resemble a well worn thimble ; the first two whorls are 
usually dome-shaped, and are always marked off from the adult 
shell by an oblique furrow. Anoglypta may perhaps be regarded 
as most retaining the ancestral sculpture. A wide band or bands 
round the base or periphery is a colour-pattern that is apt to occur 
throughout the group. The bands so conspicuous in dufresni 
recur in in flatus var. castamus, in haconi , and in angasianus ; 
they are represented on the base of Anoglypta, can be traced in 
the wide bands around the base of falconeri, and the pattern 
is distinctly repeated in some colour varieties of cunningbami . 
Another feature in common is the bluish-gleaming sub-nacreous 
lining of the interior of the shell. 
Allusion is made above to the estz of atomata. Tenison-Woods 
figured the egg of C. dufresni, and it was re-described by the 
writer, P.L.S., N.S.W. (2) VI. p. 20. A. launcestonensis is 
reported (op. cit. p. 22) to lay a similar egg. A broken egg of 
cunninghami , collected by Mr. S. Stutchbury, is now in the 
Australian Museum, and is figured PL v. fig 12. It may be 
described as globose, 9 mm. in diameter, hard, calcareous, brittle, 
white, coarsely granular without, smooth within. 
The subordination, in the foregoing synopsis, of maconelli to 
falconeri as a variety, is an innovation that demands an 
explanation which Plate iv. is intended to convey. In the latest 
notice of the genus, Pilsbry succinctly sums up the difference by 
stating (Man. Conch., 2nd Ser., Vol VI. p. 76) that maconelli is 
“Just like II. falconeri in color and sculpture, but narrower and 
and imperforate.” It is here contended that a large series 
admits of a perfect graduation, traceable from the tightly coiled, 
narrow, elevated and imperforate maconelli , to the looser coiled, 
wide, depressed and umbilicat & falconeri ; while extreme forms 
exist more elevated and more depressed than either of Reeve’s 
illustrations. Reduced outlines of Reeve’s types of maconelli and 
falconeri are represented by figs. 1 and 6 respectively ; figs. 2 
and 8 are the extremes of each form as figured in the Monograph 
of Australian Land Shells ; figs. 3, 4 and 5 are original sketches, 
from examples selected and lent for the purpose by Dr. Cox, to 
show the transition from maconelli to falconeri ; while fig. 7 is 
