V6 NOTES WITH RESPECT TO THE FRESH WATER FISH, ETC. 



This fine shell closely approaches JH", hisulcata, Pfr., and 

 JH". lamproides, Cox, in some respects, but it is easily 

 distinguished, by the almost closed perforation, by the very 

 convex base, and by its peculiar ornamental shagreen surface. 

 It has a still more close alliance with H. atramentaria, of 

 Victoria, from which it differs in the dull, coarse and more 

 concatenate form of the surface rugae ; in the smaller size 

 and in the greater convexity ; and especially in the much 

 less gradual enlargement of the whorls. The outer margin 

 is not so boldly curved, nor is the margin flattened at the 

 crown of curve as in the general form of IT. atramentaria. 

 In the small and j)artly closed perforation, and in the convex 

 base, it has characters which run very close with the latter 

 species. The relative dimensions, taking as maximum 

 diameter, show more cleai-ly their differences. 



H. Brunonia. H. atramentaria. 

 Eelative diameter Max. 1 1 



„ „ Min. 0-86 0-74 



„ height 0*67 0*52 



