148 HELIX-HADRA. 



H. cassandra PFR. P. Z. S. 1863, p. 527 ; Mon. Hel. Viv. v, p. 

 243. ANGAS, P. Z. S. 1863, p. 520. Cox, Mon. Austr. L. Sh., p. 

 50. 



The low spire, delicate whitish color, with pale bands, and densely 

 granulate surface will distinguish this form. The specimen figured 

 may not be quite adult. A young shell before me shows an addi- 

 tional band just below the periphery. 



H. STUTCHBURYI Pfeiffer. PI. 43, fig. 50. 



Shell with the umbilicus nearly covered, turbinate-globose, thin, 

 minutely granulated above, seen under a lens; pale tawny, banded 

 with rufous at the suture, and above the middle ; spire convex-con- 

 oid, rather obtuse ; whorls 5, a little convex, the last rotund, scarce- 

 ly descending in front, the base smooth ; aperture diagonal, round- 

 lunar; peristome thin, narrowly reflected, dilated above the very 

 narrow umbilicus and almost closing it. (P/r.) 



Alt. 10, greater diam. 15 i, lesser 13i mill. 



Drayton Range and Upper Dawson River, Queensland. 



H. Stutchburyi PFR. P. Z. S. 1856, p. 386 ; Mon. Hel. Viv. iv, p. 

 168. Cox, Monogr. Aust. L. Sh. p. 39, t. 10, f. 10. 



*** 



Doubtful Species oj Hadra or Badistes. 



H. MUCIDA PfeifFer. 



Shell umbilicated, turbinately depressed, rather thin, finely stria- 

 ted, deep red, appearing as if spread over with mould ; spire conoid, 

 rather blunt ; whorls 5, convex, gradually increasing, last rounded, 

 descending in front, sub-angular around the funnel-shaped umbili- 

 cus ; aperture nearly diagonal, roundly lunar, shining flesh color 

 within ; peristome briefly expanded, margins scarcely converging, 

 columellar margin triangularly dilated above and spreading. (P/r.) 



Alt. 11, greater diam. 20, lesser 16f mill. 



Percy Isles, northeast coast of Australia. 



H. mucida PFR. P. Z. S. 1856, p. 329 ; Monogr. iv, p. 264. Cox 

 Monogr. Austr. L. Sh. p. 59. 



May belong to the group of H. aridorum, porteri, etc. A smaller 

 form measures, alt. 7&, greater diam. 15, lesser 13 mill. 



H. MURINA Pfeiffer. 



Shell umbilicated, turbinately-globose, thin, regularly striated, 

 granular, somewhat roughened, deep red ; spire shortly conoid, 



