THE NAUTILUS. 121 



Lymvaa ohrussa modicella Say. Thief River Falls. 



Lymncea sterkii Baker. Thief River Falls. 



Lyinnce'i coperatn Say. Thief River Falls, Anita. 



Lymiicea palustris Miiller. Thief River Falls, Cannon Lake, 

 Halma, Anita. 



Planorbis bicarinatus Say. Lake Harriett, Cannon Lake. 



Plunorbis trivohis Say. Thief River Falls, Cannon Lake, Halma, 

 Lake Harriett. 



Plunorbis campanulatus Say. Thief River Falls, White Earth 

 Lake, Cannon Lake, Lake Harriett. 



Planorbis hirsidus Gld. Cannon Lake. 



Planorbis parvus Say. Thief River Falls, Anita. 



Segmentina armiyera Say. Thief River Falls. 



TWO NEW VARIETIES OF CYPR^A FROM N. E. QUEENSLAND. 



BY II. U. PRESTON. 



Among a number of Cypraa from N. E. Queensland recently 

 received there occur two vaiieties, one of C. xavtliodon Gray and 

 one of C. miliaris Gmel., which, thouah undoubtedly belonging to 

 these species, possess such marked varietal characters as to merit 

 notice. I therefore venture to describe them, as follows : 



Cypraa xanthodon Gray, var. carnicolor, n. var. 



Dorsal surface flesh-colored without bands, indistinctly freckled 

 with pale rusty-red; base white; posterior and median columellar 

 denticles red, anterior columellar denticles white; denticles on lip 

 pure white throughout; thinner and mora piriform than the type; 

 the posterior extremity of the outer lip is more produced, while that 

 of the columellar lip is less so than in the typical form; moreover, 

 there is no dark blotch on the columellar anterior extremity of the 

 dorsal surface. 



Alt. 24, diam. maj. 14 mm. 



Hal).: N. E. Queensland, 



The above has all the appearance of a deep-water shell. 



Cyprcza miliaris Gmel., var. nivea, n. var. 



Differing from the typical form in having the dorsal surface 

 grayish-white, gradually shading to pure white towards the base, 



