104 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



This species approaches near to Helix perspvctiva, Say, found 

 in North America. Cape York and Albany Island specimens 

 run large, from the other islands much smaller. 



14. — Helix (Conulus *?) Porti. 



Shell imperforated, turbinately globose, thin, shining, trans- 

 parent, horny yellow, regularly mai'ked with very fine oblique 

 striae, transversely striated, giving the shell the appearance of 

 being granulated ; whorls, 3-|, roundly convex, spire conoid, apex 

 roundly obtuse, suture distinct, roundly convex at the periphery, 

 base convex, with spinal striae, aperture diagonal, lunately 

 rounded, peristome thin, acute, margins distant, columellar margin 

 rather thickened into a minute callus plate. 



Diam. Maj. |, min. J, alt. £. 



Hob. Albany Island, North Australia. 



Only one specimen found amongst a vast quantity of volcanic- 

 scoria. 



15. — Helix (Conulus ?) Grenvillei. 



Shell as seen under the lens, imperforated, turbinately 

 depressed, thin, transparent, reddish, spirally striated, whorls 3|, 

 convexly rounded, studded with three rows of spiral stunted 

 hairy bristles, not seen on the upper whorls, rather obliquely 

 rugosely striated at the suture, spire moderately conoid, obtuse at 

 the apex, periphery rounded, base convex, marked with fine striae, 

 aperture nearly vertical, ovately rounded, peristome thin, simple, 

 acute, margins distant, the right very thin. 



Diam., Maj., | min. ^ alt. \ lin. 



Hah. Home Islands, off Cape Grenville, North East 

 Australia. 



Characterised by bristly hair on the centre of the last whorl, 

 and resembles, in miniature, the Helix aculeata, Muller, from 

 Europe. One specimen only found under leaves. 



16. — Helix (Ochthephila) D'Albertisi. 

 Shell umbilicated, pyramidally conical, thin, light reddish 

 brown, hyaline, spire raised, apex white, acute, whorls 8£, slightly 

 convex, the upper half closely, obliquely, rugosely lined, the lower 



