42 TIIK NAUTILUS. 



interrupted by numerous wavy lines and oblong blister-like wrink- 

 les, hardly pei'ceptible to tlie naked eye ; whorls 51, convex, striped 

 by a single chestnut band, double margined by lighter ones ; spire 

 very little elevated, suture well impressed ; lip simple reflected, and 

 nearly covering the umbilicus, its terminations approaching and 

 joined by a thin callus ; umbilicus narrow and small. 

 Height I inch, greatest diam. 1 inch, lesser i inch. 

 Habitat San Jasinto Valley, San Diego Co., Calif. 

 A very depressed form, quite variable in size, some of the speci- 

 mens not being more than half the size of the measurements given. 

 It is lighter colored than any of the southern varieties of tudica- 

 lata, except var. Binneyi. 



Selenites Vancouverensis, var. Keepi, Hemphill. 



Shell urabilicated, greatly depressed, thin, smooth, shining tran.s- 

 parent, scarcely marked by the delicate wrinkles ; very light horn 

 color ; whorls over four, somewhat flattened above and beneath, 

 and scarcely descending at tlie aperture ; spire flat, not rising above 

 the body-whorl ; suture well impressed ; umbilicus moderately large, 

 exhibiting mo.-*t of the volutions; aperture transversely subcircular, 

 wider than high ; lip simple, thickened, sinuous above, very slightly 

 reflected at the base, ends scarcely approached. 



Width T6 inch, height f? inch. 



Habitat, Hills near Oakland, California. 



One specimen only. 



This rare and interesting little shell I collected some years ago. 

 It is a perfect miniature form , in every respect, of S. Vancouverensis. 

 I regard it as an extremely small variety of that so-called species. It 

 is about the size of the variety of S. Duravti lately described as 

 »b'. ccelata Mazyck, but differs very materially in form, sculpture and 

 the general texture of the shell. It differs from var. Catalinensis 

 in being more robust, larger, and has a smaller umbilicus. I dedicate 

 this pretty little shell to Prof. Josiah Keep of i\Iills College, Cali- 

 fornia, who has done so much through his interesting little book to 

 stimulate the study of West Coast shells. 

 Selenites Vancouverensis var. hybrida Ili'iuphill. 



Shell broadly umbilicated, depressed, slightly convex above, sur- 

 face shining, polished, of a dark yellowish-green color, lines of 

 growth coarse, rib-like and regular on the spire, finer and more ir- 

 regular on the bodv-whorl, crossed by fine revolving linos that be- 



