CONCHOLOGIA CESTRICA. 29 



M. bucculenta, GOULD. 



Helix bucculenta, Gould, Proc. Bost Soct. Nat. Hist, 

 III, 1848. 



M. bucculenta. [B. & B.] 



rig, 22, 



Shell sub-globose, finely striate, yellowish-white to 

 pale brown; whorls 5, rounded; base convex; aperture 

 rounded ; the peristome forming nearly two-thirds of a 

 circle, and broadly reflected, white, flesh colored behind; 

 umbilicus partly covered; sometimes a small, white, 

 tooth on the pillar, often edentate. H. 10, W. 15, 

 mill. 



Station, under logs in moist grounds, and meadows. 

 Chester County ; common. 



M. bucculenta, var. Rufa, Michener, Amer. Jour. 

 Conch., II., 1866. 



Helix rufa, De Kay, Nat. Hist. N. Y., Part I., 1843. 



Shell smaller and more delicate than the preceding; 

 often strongly rufous, giving color to the reflected lip; the 

 transverse striae are strongly marked, and often reticu- 

 lated, by microscopic revolving lines. H. 13, W. 18, 

 mill. 



Station, accompanying the last species. Chester 

 County ; common. 



OBS. W. G. Binney, speaking of M. albolabris, says, 

 " Helix rufa, De Kay, appears to be the young of this 

 species." Again, under H. thyroides, he says : " One 

 [variety] from Germantown, Pa., is very small, measuring 

 only 15 millimeters in diameter. It is globose, shining, 



sometimes imperforate, and generally without a parietal 



?* 



