A Review of the Laxd ^Iollusca of Western Austraeia. 
61 
broad medium brown band being’ omnipresent, but all the others are in- 
constant, from one to three above, and one to six below of different strength. 
The columella completely seals the umbilicus in the adult. The type mea- 
sures 18 mm. in height, and 12.5 mm. in breadth. 
This was collected by Dr. If. Basedow about the middle of Napier 
Range, while W. W. Froggatt bad previously collected it towards the south 
end of the same range. 
Rhagada mimika sp. nov. 
Plate IV., flg. 4. 
This is almost a miniature of gatta rather than of constmn, but con- 
stantly shows more banding, having usually two bands above the median 
broad band, and five below, all being fairly strongly coloured brown. The 
shell has the umbilicus completely sealed, ami the type measures 12.5 mm. 
in breadth with 9 mm. in height, and was collected by W. W. Froggatt in 
the Napier Range “on grass, etc.” These are always small, and the columel- 
lar tooth is more marked than in the larger shells. 
Rhagada basedowana sp. nov. 
Plate IV., flg. 6. 
A large series, collected by Dr. H. Basedow “on trees and on Triodia 
tussocks” off the Linu'stone Caves at the north end of the Napier Range, 
is uniformly chalky white, the characteristic median band being missing. 
Some of the juveniles are faintly banded but the coloration soon disappears. 
As some hundreds were collected this is a striking feature, the shells being 
solid with the umbilicus completely sealed, but the immature deep narrow 
perforation persists until the shell is practically full grown, these juveniles 
being notably keeled, and the last whorl is almost subcarinate. The type 
measures 15 mm. in breadth and 10 mm. in height, the series varying from 
13 to 15 mm. in breadth and 9 to 11 mm. in height. 
Rhagada sutra sp. nov. 
Plate IV., flg. 9. 
This differs from the lU’cceding four species in coloration, but notablv 
in that the umbilicus is never completely sealed up. The shell is small, simi- 
larly formed to the preceding forms, but the coloration has massed so that 
the genera] appearance of the shell is brownish with a few whitish bands. 
A few adult shells and many immature ones were “found under logs and 
damp stones” by V . W . Froggatt in the Napier Range. The type measures 
12 mm. in breadth by 8 mm. in height. 
Rhagada convicta Cox 1870. 
Plate IV., figs. 10-13. 
1870 Helix convicta Cox, Proc. Zool. Soc. (Loud.), 1870, p. 171, pi. XVI., 
f. 6, Nov. 11. Nichol Ray, West Australia. ’ 
Fig’d. Pilsbry, Man. Conch. (Ti'yori), Ser. 2 (pt. 23), ^'ol. VI., p. 
187, pi. 14, f. 65 (copy of CoxV figure) ; pi. 35, figs. 8, 9, 10, Dee' 
16, 1890. 
1877— ITelr convicta Martens, Monatsb. Ak. Wissen. Berlin, 1877, p. 
272, jd. I., figs. 6, 7, May No. Mermaid Straight, Nortli-lVest 
Austi’alia (T. Studer). 
