106 HELIX-CHAROPA. 



decussated by similar spiral line ; suture impressed, spire plane 

 umbilicus wide, one-third of diameter, aperture vertical, ovate 

 lunate, peristome sharp, thin. 



Diam. maj. 2, min. 2. alt. 1 mill. (Hedley.) 



Lord Howe Island ; between the North Kidge and Old Settle- 

 ment. 



Helix (Charopa) wilkinsoni BRAZIER, Austr. Mus. Mem. no. 2, t. 

 5, f. 3, 4 (reversed), 1889. Charopci wilkinsoni Braz., HEDLEY, 

 Rec. Austr. Mus. i, p. 138, June, 1891. 



The type is in the Australian Museum. My artist has copied the 

 original figures, rectifying the accidental reversion. 



P. UNWINI Brazier. PI. 19, figs. 51, 52. 



Shell small, depressed, thin, translucent, umbilicate ; color uni- 

 form pale yellow ; whorls 4, rounded, gradually increasing ; sculpt- 

 ure oblique radiate striae; spire slightly elevated, apex obtuse; sut- 

 ure impressed; umbilicus wide, one-third of the diameter, deep, 

 perspective ; aperture not descending, roundly lunate, peristome 

 thin, straight. Diam. maj. 21, min. 2, alt. 1 mill. (Hedley.) 



Low grounds at the north end of Lord Howe Island. 



Helix (Patula) unwini BRAZ., Austr. Mus. Mem. no. 2, t. 4, f. 5, 

 6 (reversed). Charopa unwini Braz., HEDLEY, Records Australian 

 Museum i, p. 138. 



The type is in the Australian Museum. 



P. WHITELEGGEI Brazier. PI. 19, figs 53-58. 



Shell discoidal, umbilicate, thin, translucent ; color chestnut 

 painted with zig-zag straw flames, interior subnacreous with bluish 

 lustre. Whorls 3, rapidly increasing, flattened between the 

 periphery and the suture, subangled at the periphery, slightly 

 descending at the aperture. Sculpture: numerous irregular oblique 

 sinuate sharp cosUe, which are smaller and closer on the last whorl ; 

 in their interstices and parallel to them are close fine hair lines; 

 there is a decided break in the sculpture on reaching the embryonic 

 whorls which faintly repeat the adult sculpture. Suture deep, 

 acutely impressed, spire sunk, embryonic whorls 1-1, distinct; 

 epidermis glistening ; base rather flattened, umbilicus about one- 

 sixth of major diameter, perspectively exhibiting all the earlier 



