so RECORDS OF THE AUSTRALIAN MUSEUM. 



falconeri ; figs. 23, 24, 25, ditto dufresni ; PL xv. fig. 14, ditto 

 melo ; PI. xvi. fig. 7, radula of dufresni; fig. 10, ditto falconeri ; 

 PI. xvii. fig. 13, ditto melo ; Proc. Roy. Soc. Queensland, VI., 

 PI. iii. jaw, radula and genitalia of cunyiinghami ; PI. xiv. jaw 

 and radula of raastersi ; P.L.S., N.S.W. (1) III. PI. vii. fig.' la, 

 egg of dufresni; op. cit. (2) VI. PI. 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 (PI. 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. Anorflypta 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 gi'oup. The bands so conspicuous in dufresni 

 recur in infiatus var. castaneris, in baconi, 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 cunningliami. 

 Another feature in common is the bluish-gleaming sub-nacreous 

 lining of the interior of the shell. 



Allusion is made above to the egg 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. launcestoneoisis 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 PI. 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 difierence by 

 stating (Man. Conch., 2nd Ser., Vol VI. p. 76) that maconelli is 

 " Just like //. 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 macotielli, to the looser coiled, 

 wide, depj'essed and umbilicate 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 



