HADRA. 283 



of the Land Shells of Australia. A feature of these particular spe- 

 cimens is that some of them are encircled with a somewhat broad 

 rufous band just above the periphery, which in very many of the 

 examples has a tendency to spread toward the suture. In others 

 again, there is not the slightest semblance of the band of color, and 

 it is evidently specimens of this type that were submitted to Dr. 

 Pfeiffer, as he makes no mention of this character. Of a number of 

 living and mature shells received by me some two years since, some 

 do and some do not ex'hibit the band. This species varies a great 

 deal, not so much in shape as in thickness, and again in coloration. 

 The typical form is solid, but by far the greater number of the 

 shells obtained during the expedition are comparatively thin, and 

 appear to be identical with a race of this species which has extended 

 southward from the MacDonnell Ranges, and of which we have 

 examples collected at Wilson and Carrieton. At one locality a 

 dwarf form was taken very much in size and shape like Helix flin- 

 dersi Adams and Angas, but without the color-bands of that species. 

 In coloration the shell varies considerably ; some are a creamy- 

 white, others have a faint interrupted cloudy-reddish band just 

 above the periphery ; in others this band becomes a most distinctive 

 marking, while in very many the band extends from the periphery 

 to the suture, being darkest in the center. In the dwarf examples 

 the shells are of a uniform greenish hue, with a shining vitreous 

 appearance. (Bednall). 



Helix ( Galaxias) perinflata Pfr. BEDNALL, Trans. Roy. Soc. S. 

 Australia, xvi, pt. 1, p. 63, t. 1, f. 6 (Dec. 1892). 



Subgenus RHAGADA Alb. 

 H. SUPRACOSTULATA Schepman. For figs, see Vol. IX. 



Shell globosely depressed, with a covered umbilicus, only percep- 

 tible as a narrow slit; solid, upper part distinctly plicately ribbed, 

 base rather smooth ; whitish with a rather broad dark brown band 

 at the periphery and a narrow one near the sutures, besides a num- 

 ber of paler bands above and below varying much in the individual ; 

 apex obtusely convex ; whorls 4, slightly convex, last whorl 

 descending abruptly in front. Aperture oblique, rounded ; lip 

 slightly expanded, thickened, white ; columellar margin covering 

 nearly completely the umbilicus, with a tooth-like projection, outer 

 margin near the peripheral band with a second very faint tooth, 

 margins approximating, united by a thin callosity. (Schepm.*) 



