158 HELIX-HADRA. 



one of which continues up the spire, and a light band or lines 

 around the umbilicus ; sutural light line very narrow, or almost 

 obsolete ; lip broadly expanded, deep brown in color. 



The shell is compact, the base depressed, spire convex and more 

 or less elevated ; suture superficial ; whorls 51, those of the spire with 

 a light band in the middle, the body-whorl more or less compressed 

 and sloping above, broadly excavated around the funnel-shaped um- 

 bilicus, deflexed in front. Aperture very oblique, livid and show- 

 ing the bands within ; lip broadly expanded, deep brown, baso-col- 

 umellar margin dilated over and half covering the umbilicus. 



Alt. 29, greater diam. 38, lesser 31 mill. 



Alt. 27, greater diam. 34 mill. 



Mount Dryander, Port Denison, Queensland, Australia. 



H. Rainbirdi Cox, P. Z. S. 1870, p. 170, 1. 16, f. 1. PFR., Monogr. 

 Hel. Viv. vii, p. 365 ; Conchyl. Cab., p. 545, t. 165, f. 6, 7. H. basa- 

 lis Mouss. in Mus. God. Cat. v, p. 95. HEDLEY, Proc. Roy. Soc. 

 Queensl. 1889, p. 120, t. 7 (Anatomy.) 



The typical form described above is figured on pi. 39, figs. 86, 87. 



A variety is figured on pi. 35, figs. 6, 7. It is more depressed 

 than the type, with only one supraperipheral yellow zone, the whorls 

 of the spire dark, bandless. 



The light bands are often split by dark lines. This is shown in 

 a specimen before me labelled " H. basalis Mouss., Port Mackay" 

 which seems to be a small form of rainbirdi. It is figured on pi. 

 39, figs. 84, 85. 



The species is less flattened on the base than H. roclcliamptonensis, 

 and more depressed. It differs from H. oconnellensis in being larger 

 and differently banded. 



H. OCONXELLENSIS Cox. PL 23, figs. 69, 70, 71. 



Shell with a funnel-shaped umbilicus, depressed globose, unicol- 

 ored deep chestnut except for a sharply defined subsutural white 

 border. 



The shell is compact, flattened on the base, broadly excavated at 

 the umbilicus, which is half-covered by the overhanging baso-colu- 

 rnellar lip. Unicolored deep chestnut all over, except for a white 

 band at the suture about a millimeter in width. Whorls 5^-6, 

 scarcely convex except the last one, which is well-rounded and de- 

 scends rather deeply in front. Aperture very oblique, lilac or pur- 

 ple inside, becoming darker on the broadly expanded lip. Columel- 



