144 HELIX-HADRA. 



H. LINCOLNENSIS Pfeiffer. PI. 43, fig. 36. 



Shell umbilicated, somewhat conoidly-depressed, rather thin and 

 moderately glossy, pellucid, very closely, coarsely and irregularly 

 rugosely striated, and finely granulated, of a rich deep-chestnut 

 throughout ; spire slightly elevated, widely conical, obtuse, suture 

 pale ; whorls 5, rather flattened, last rounded, rather depressed above, 

 and sometimes indistinctly angular at the periphery, descending in 

 front ; base less strongly striated than above, smoother -and more 

 glossy, umbilicus small ; aperture Innately ovate ; peristome simple, 

 thin, straight, margins moderately approximating, columellar mar- 

 gin rather widely expanded above, and reflected over of the um- 

 bilicus. '(Cox.) Alt. 0*35, greater diam. 0'80, lesser 070 inch. 



Port Lincoln, S. Australia. 



H. lincolniensis PFR. P. Z. S. 1863, p. 527. Cox Mon. Austr. L. 

 Sh., p. 51, t. 6, f. 9. ANGAS, Quart. Journ. of Conch, i, p. 135. 



H. LTJTEOFUSCA Cox. PI. 40, figs. 93, 94. 



Shell openly umbilicated, depressed, obliquely rugosely striated, 

 and obsoletely granulated, thin, yellowish-brown or dark chestnut ; 

 spire rather prominent ; whorls 4, regularly increasing, last whorl 

 depressed throughout, on which the elevation of the spire depends, 

 periphery blunt, slightly angled, base convex ; aperture diagonal, 

 Innately rounded ; peristome simple, lip thin, margins approaching, 

 columellar margin but little everted, the opposite margin inserted 

 beneath the angulation of the, second whorl. ( Cox.) 



Alt. 0-33, greater diam. 0'65, lesser 0'50 inch. 



Flinder's Range, S. Australia. 



H. luteofusca Cox, Monogr. Austr. L. Sh. p. 52, t. 12, f. 1, la. 



This species, H. lincolnensis, H. tomsetti and H. evandaleana 

 may be more correctly placed in the group of H. bitceniata. 



*** 



Group o/H. bitceniata Cox. 



Species of this group are characteristic of the fauna of South Aus- 

 tralia. 



H. BIT^NIATA Cox. PI. 38, figs. 66, 67, 68. 



Shell globose, narrowly umbilicated, straw-colored with two 

 brown bands, one at the suture the other and wider one above the 

 periphery ; surface rather rudely strongly striated, especially above ; 

 lip obtuse, not expanded. 



