OF CONCHOLOGY. 851 



DESCRIPTION OP NEW SPECIES OP SHELLS. 



BY JOHN G. ANTHONY. 



1. Unio Peguensis, Antliony, — t. 25, f. 2. 



Description. — Shell ovate-elliptical, smooth, inequilateral, 

 moderately thick; epidermis olivaceous, with delicate capillary 

 lines on the posterior slope, thickly crowded, which gives that 

 portion of the shell a greenish tinge; lines of growth fine, 

 crowded, elevated; beaks not elevated, very much eroded in 

 all the specimens I have seen, but there is no appearance of 

 any undulations at the tip ; ligament long, straight, thin and 

 yellow; cardinal teeth lamellar, thin, erect, and widel}' sepa- 

 rate and divergent from the lateral teeth, which are long and 

 somewhat curved; anterior cicatrix deep and distinct, poste- 

 rior ones faint and confluent ; nacre yellowish and silvery. 



Habitat, — Pegu, British Burmah. 



Cabinet of George W. Tryon, Jr. Mus. Comp. Zoology, 

 Cambridge, Mass. 



2. Helix cerinoidea, Anthony. — t. 25, f, 3. 



Description, — Shell narrowly umbilicated, orbicularly con- 

 vex, thin, of a waxy horn-color, closely and finely ribbed ; 

 whorls 7, convex, the last one inflated; umbilicus narrow, 

 nearly covered by the columellar lip ; aperture semi-circular ; 

 lip. not reflected, margins connected by a thin white callus. 



Habitat. — North Carolina. 



Cabinet of George W. Tryon, Jr. Mus. Comp. Zool., Cam- 

 bridge, Mass. Cabinet of Hugh Cuming, London. 



Observatio?vs. — It may be compared with IT. Elliotti, Eed- 

 field, which it resembles somewhat in color, but is less flat- 

 tened, smaller, and has the umbilicus less open ; its surface has 

 a peculiarly shining, waxy appearance. 



