HELIX-HADRA. 183 



Brazier is in error in referring H. semicastaneaio jannellei (Proc. 

 Linn. Soc. N. S. W. i, p. 126) ; this mistake was first made by Cox. 



H. PERINFLATA Pfeiffer. 



Shell umbilicated, globose, solid, decussated by rough growth 

 striae and impressed lines descending forward ; yellowish-white ; 

 spire convex-conoid, apex obtuse ; whorls 4J, the last large, ventri- 

 cose, much inflated beneath, sculptured with obsolete spiral strife, 

 deflexed in front ; aperture oblique, lunar-rounded ; peristome nar- 

 rowly expanded, the columellar margin dilated in a plate over the 

 narrow umbilicus. (Pfr.) 



Alt. 20, greater diam. 231, lesser 20 mill. 



MacDonnell Ranges, Central Australia. 



H.perinflata PFR. P. Z. S. 1863, p. 528; Mon. Hel. Yiv. v, p. 

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

 45. ANGAS, Quart. Journ. of Conch, i, p. 135. HEDLEY, Proc. 

 Roy. Soc. Queensl. vi, p. 250, 251, plate xiv, (anatomy.) 



H. LYNDI Angas. PI. 38, fig. 72. 



Shell irnperforate, globosely conical, solid, obliquely plicately stri- 

 ated, the upper whorls minutely granulated, the lower whorls dis- 

 tantly and obscurely concentrically striate, light-chestnut color 

 above, the last whorl brownish olive, with a faint indication of paler 

 bands below the periphery ; spire convexly conical, apex obtuse ; 

 suture distinct, crenulated ; whorls 5, convex, last whorl descending 

 in front, and contracted behind the aperture ; aperture oblique, elon- 

 gately oval, purplish brown within ; peristome with the margins 

 approximating, and united by a thin callus, finely and sparingly 

 granulated, the right margin expanded and reflexed, light brown ; 

 the columellar margin angulated at the fore-part, broadly and flatly 

 expanded, and slightly excavated at the upper part, white tinged 

 with light brown and furnished with a few irregular granules. 

 (Angas^) 



Alt. 21, greater diam. 20, lesser 17 lines. 



Port Essington, North Australia. 



H. Lyndi ANGAS, P. Z. S. 1872, p. 610, t. 42, f. 1. PFR., Mon- 

 ogr. vii. TATE, Trans. Proc. Rep. Roy. Soc. S. Austr. v, p. 49, 1882. 



This shell differs from H. pachystyla in the spire being more 

 raised, the aperture being more produced anteriorly, with the mar- 

 gins approaching, and the outer lip expanded and reflexed. It also 

 differs in the character of the sculpture, and in being of a darker 



