OF OONCHOLOOY. 81 



5. Physa pectorosa, Conrad. — t. 1, f. (!. 



Description. — ■"Sub-ovate; volutions -i or 5; spire sliort, 

 apex eroded; penultimate whorl ventricose; columella witii 

 a prominent, compressed, triangular, oblique tooth or ftUd ; 

 epidermis olivaceous, clouded with brown, f, i.'" 



Ph. pectorosa^ Conrad. — 1. c, p. 11. 



Locality. — Bogan River, Australia. 



Observations. — This is a much inflated species, almost shoul- 

 dered above; columella with a double fold — a character which 

 I have not observed in any other species of the genus. 



6. Physa Australiana, Conrad.— t. 1, f. 7. 



Description. — "Elliptical, thin, diaphanous : volutions 4 or 

 5, regularly convex ; spire short ; epidermis araber-colorsd : 

 columella with a slender prominent fold, which revolves within 

 to the apex; margin of labrum regularlv curved or rounded. 



if-" 



Ph. Australiana, Conrad. — ^I. c, p. 11. 

 Locality. — -Bogan River, Australia. 



