222 AMERICAN JOURNAL 



8. Hydrobia glabra, Tryon. — t. 22, f. 12. 



Description. — Shell smooth, turrited, consisting of nearly 

 seven convex whorls, with deeply impressed suture; spire 

 long, acuminated, apex acute; aperture ovate, slightly oblique. 

 Color light horn, or nearly white. 



Dimensions. — Length -18 inch, diameter, '095 inch; length 

 of aperture '07 inch, breadth "05 inch. 



Habitat. — Bolivia. Wesley Newcomb, M. D. 



My Cabinet. Cabinet of Dr. Newcomb. 



Observations. — This species does not resemble very closely 

 any of the South American Paludestrinse described by D'Or- 

 bigny. It is a longer, narrower, lighter colored and more 

 fragile species than IT. Californica, nob. 



9. EissOA CooPERi, Tryon.— t. 22, f 13. 



Description. — Shell elongated, consisting of five rather flat- 

 tened whorls, regularly diminishing to an acute apex, suture 

 well marked; body whorl a little inflated, obtusely angled on 

 the periphery; aperture small, oval. Color dark brown; sur- 

 face smooth, not polished. 



Dimensions. — Length '125 inch, diameter '07 inch; length 

 of aperture -055 inch, breadth -04 inch. 



Habitat. — San Diego, Cal., Salt Water Grass. Dr. J. G. 

 Cooper. 



My Cabinet. 



Observations. — Differs from Hydrobia Californica, nob., in 

 being narrower, more solid in its flattened whorls, and dull 

 aspect. Some specimens are rimate. 



