Shells of New England. 39 



CYCLAS MINOR. 



PJate IV. Fig. 2. 



C. testa, minima, ovatci, inequilateral!; natibus tumidis, approximatis ; mar- 

 ginibus rotundatis; dentibus omaibus fortibus. 



Shell very small, ovate, inequilateral, finely striate, shining, 

 horn color, yellowish towards the margin ; beaks rather prom- 

 inent, moderately tumid, not undulate, approximate, situated 

 two-fifths the distance from one extremity to the other ; mar- 

 gins rounded, both the cardinal and lateral teeth well de- 

 veloped. 



Length, ,18 inch ; height, ,15 inch ; width, ,11 inch. 



Habitat. Found among dead leaves, in a swamp, in Wey- 

 bridge, Yt., in the spring of 1839. Subsequently it has been 

 found in several other places in the vicinity, and in Portland, 

 Me. It is not confined to the water, but is often found a foot 

 or more from it, burrowing deep in the mud, and under stones. 

 It is in the Cabinets of the Bost. Soc. Nat. Hist., J. W. 

 Mighels, and C. B. Adams. 



CYCLAS NITIDA. 



Plate IV. Fig. 3. 



C. testa sub-ovatfi, inequilateral! ; natibus parvis, baud approximatis; dentibus 

 lateralibns fortibus, cardinalibus obsoletis. 



Shell sub-ovate, inequilateral, finely striate, shining, horn 

 color, yellowish towards the margin, often blueish on the 

 umbones ; beaks small, rather prominent, not undulate, not 

 approximate, situated about two-fifths of the distance from 

 one extremity to the other ; inferior margin well rounded, the 

 other margins moderately rounded ; cardinal teeth obsolete, 

 lateral teeth well developed. 



Length, ,3 inch ; height, ,24 inch ; width, ,2 inch. 



Habitat. We obtained a few specimens of this species at 

 Norway, Oxford Co., Me., in the summer of 1840. It is very 

 rare. It is in the Cabinets of the Bost. Soc. Nat. Hist., J. W. 

 Mighels, and C. B. Adams. 



Remarks. The embryo shell is elliptical, obliquely striate, 



