106 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



with small long narrow light reddish streaks and spots, more 

 numerous towards the upper part, spire conoid, rather acute, 

 whorls 4 to 4^, slightly convex, the last more convex, marked 

 round the peripheiy, which is acute with a broad white opaque 

 band, base convex, with obsolete white bands, interior and colu- 

 mellar pink, peristome jet black, aperture oblique, triangularly 

 ovate, margins approaching, right bisinuated and contracted in 

 front, thickened and reflected. 



Diam. Maj. 10J, min. 8|, alfc. 6. 



Hah. Yule Island, New Guinea. 



This interesting species differs from anything known to me from 

 New Guinea, it is so variable in colour. Some specimens have 

 the light reddish streaks obliquely placed, and destitute of the 

 opaque white lines running spirally iuwards on the body whorl and 

 the fine rose tint round the columellar and interior of the aperture ; 

 peristome at the periphery twisted and bisinuated inwards. 



19. — Helix (Geotrochus) Strabo. 



Shell imperforated, conic, somewhat trochus shaped, thin, finely 

 striated, and obsoletely spirally marked with lengthened granula- 

 tions ; bright straw yellow, spire conoid, apex acute, whorls 4; 

 slightly convex, the 3 upper nearly smooth, suture channelled, 

 periphery sharply keeled, rounded in front, base convex and 

 marked with faint white opaque lines ; aperture oblique, triangu- 

 larly ovate, peristome expanded and reflected, rose pink, margins 

 distant, the right bisinuated inwards at the front, columellar margin 

 regular and reflected. 



Diam. Maj. 11, min. 8^, alt. 6 J lin. 



Hab. Katow River, New Guinea ; found on trees. 



This is another curious form, having the centre or outer margin 

 of the peristome bright rose colour and formed like a spout, and 

 between the margins and on the base a faint blotch of rose pint. 

 Only three specimens found on the banks of the above river. 



20. — Helix (Geotrochus) Siculus. 

 Shell narrowly umbilicated, depressly globose, rather solid, finely 

 striated, pale brown, ornamented with three chestnut bands, two 



