OF dONCHOLOaT. 321 



Dr. Newcomb states that this species is not Californian or 

 Oregonian, but belongs to a more southern launa. I have 

 specimens, however, referable to this species, received from 

 Dr. Newcorab, from Bay of Monterey, Cal., as a variety of H. 

 areolata. It is more orbicular than that species, the columella 

 more distinctly tuberculate, and the surface more granulate. 

 The first figure is a copy of that given by Pfeiffer, while the 

 last represents a fresh and larger specimen. 



7. Polymita varians, Menke. 



Plate 6, figures 9-13. 



Globose-conic, solid, smooth, shining, delicately striate; spire 

 elevated-conic; whorls 5|, convex, the last broadly rounded; 

 aperture small, two-thirds circular, lip expanded a little, thick- 

 ened within, very nearly covering the umbilicus; base con- 

 vex. White, greenish, reddish or brown, sometimes with 

 black or white bands, one or more in number, disposed on 

 different portions of the surface, apex and columellar part of 

 the lip always rose-color. 



Diam. 17, height 15 mill. 



Florida. (From West Indies.) 



TACHEA, Leach. 

 1. Tachea hortensis, Miiller. 



Plate 6, figures 14, 15. 



Subglobose, smooth; spire conoidal; whorls 6, the last ven- 

 tricose ; aperture rounded-lunar, lip dilated, thickened within; 

 base convex, imperforate. Yellowish, sometimes with one to 

 five revolving dark brown bands. 



Diam. 19, height 16 mill. 



New England States near the sea, and Islands on the coast. 

 (From Europe.) 



