fiY C. ttEt>LE\. 25? 



a half finely and densely grained, the remainder of the shell has 

 microscopic growth-lines. Over all the shfell are small, short, 

 spaced bristles set in radial and oblique lines; between them the 

 surface is minutely shagieened. Behind the lip, the last whorl 

 is suddenly but tightly contracted, the contraction, open above, 

 narrowing as it descends till, on the base, it ends in a groove 

 running beneath the lip into the axis. Aperture ovate-lunate, 

 very oblique, lip thickened and broadly reflected, left insertion 

 spread, right attenuated, margins connected with a thin sheet of 

 callus advanced beyond the axis. Major diani., 15; minor diam., 

 12; height, 10 mm. 



Hab.^A few specimens were discovered by Mr. 8. W.Jackson, 

 in November and December, 1908, in Tinaroo scrubs, south-west 

 of Cairns. 



Chloritis cognata Gude, var. pr^cursoris, var.nov. 



(Plate v., figs. 17, 18, 19.) 



This form agrees with the type of C. cognata Gude,* with which, 

 through the kindness of Dr. J. C. Cox, 1 have compared it, in 

 size, shape, substance and the disposition of the hair-scars. It 

 diifers by a very narrow umbilicus, oblique, and a third covered 

 by the reflection of the columella. It also differs by the colour 

 which is ochreous-buflf darkening to rufous behind the aperture 

 and on the base. 



Mr. Jackson found it nearly two hundred miles north of 

 Olsens Caves, where Mr. C. T. Musson took the tN'pe of C. 

 cognata. Var. prcecursoris inhabits the upper valley of the 

 Pioneer River. The example drawn was " found alive in dense, 

 tall, tropical scrub, Eungella cutting, Eungella Mountain, west of 

 Finch Hatton, Mackay District, August, 1908.' 



C. aridorum. Cox, is rather similar, but has a more open umbili- 

 cus, the hair-scars(fig.'23) more distant and prominent, and half a 

 whorl less. 



As the existing figures of C. aridorum are not satisfactory, 

 others(Plate vi., figs.20, 21, 22, 23) are here presented, based on 



* Gude, IVoc. Malac. S<>c. vii., 1907, i>.-;'l, I'l.xxi., f.ij. 



