OF CONCIIOLOGY. 81 



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



Description. — -"Sub-ovate; volutions 4 or 5; spire short, 

 apex eroded; penultimate whorl ventricose ; columella with 

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

 epidermis olivaceous, clouded with brown, f, |." 



Ph. pectorosa, Conrad. — I. c, p. 11. 



Loca lit y.'— 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, thiu, diaphanous; volutions 4 or 

 5, regularly convex ; spire short ; epidermis amber-colored ; 

 columella with a slender prominent fold, which revolves within 

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



3 3" 

 4» 8- 



Ph. Australiana, Conrad. — -1. c, p. 11. 

 Locality. — Bogan River, Australia. 



