FROM NEW YORK, NEW JERSEY^ AND GEORGIA. 143 



This species is very numerous in the Lakehnrst sphagnum. Dimensions: — 

 Length 116-155 jx ; breadth 90-125 fx ; thickness about half the breadth. 



Var. L^vis, var. nov. 



Dimensions. Length 63-95 /x ; breadth 46-70 jx. 



Habitat. Submerged sphagnum. 



Distribution. Lakehurst, N.J. 



This variety is distinguished from the type only by its small size, from 

 IT. sordida by its smooth test destitute of adherent particles. At Lakehurst 

 it occurs plentifull}^ in company with H. sphagni, Leidy does not give any 

 illustration of this small variety. 



H. PETRICOLA, Leidy. 



Leidy, pi. 26. figs. 13, 14, 16-19 (30), 



Abundant in sphagnum of a light brown colour ; in lakes and ponds 

 frequently colourless. Length 70-114 [x. 



Var. MAJOR, Ca^A (10). 



The larger individuals agree with Cash's description of this variety. 

 Length 120-135 ix. 



Var. AMETHYSTEA, Penard. 



Not common, of normal size and colour, 



H. ROSEA, Penard. 



Not frequent except at Grood Grround ; the broader test and yellow lips as 

 well as the rose colour differentiate it from the last species. 



H. SORDIDA, Penard (37, 1910). 



Not uncommon at Lakehurst and of normal size. Length 62-68 ix. 



Genus AwERiNZEWiA, Scliouteden. 

 AwERiNZEWiA CYCLOSTOMA {Penard), Schout. 



This species is rare ; in appearance it resembles Heleopera petricola var. 

 ametJn/stea, but it is larger and has opaque white plates or grains incorporated 

 with its violet-coloured test ; the aperture, which is small and oval, is bordered 

 by an internal thickening of the test. Length about 150 fx. 



Distribution. Switzerland (36) ; Ireland (45) ; Ontario (39) ; Seychelles, 



