32 NEW-YORK FAUNA MOLLUSCA. 



Helix subglobosa. 



PLATE II. FIG. 14, i. B. ; AND PLATE III. FIG. 39, A. B. — (STATE COLLECTION.) 



H. subglobosa. BiNNEY, Jour. Nat. History, Vol. I, p, 485, pi. 17. 

 H. hortensis, GouLD, Invertebrata of Mass, p. 172. 



Description. Shell elevated, subglobose, imperforate. Umbilical region indented. Whorls 

 five, rounded, with numerous transverse striae. Suture distinctly impressed. Apex some- 

 what elevated. Aperture lunate ; its upper margin embracing nearly half of the penultimate 

 whorl. Lip simple, but everted above until it reaches the plane of the umbilical region, 

 where it becomes reflected throughout the remainder of its extent, being duplicated on the 

 umbilicus. Base convex. 



Color. Light waxen, with five to six dark rufous revolving lines on the body-whorl. In 

 those with six lines, the line above the lowest is very broad ; the succeeding one above becomes 

 effaced in the suture, so that only two are obvious on the whorl above. In specimens with 

 but five revolving lines, three narrow bands may be traced on the second whorl ; these lines 

 are evident on the inner side of the outer lip. In dead shells, the waxen parts become white, 

 and the revolving rufous lines become nearly effaced. There are varieties entirely destitute 

 of the revolving bands. The animal has the head and neck blackish, slightly tinged with 

 brown ; base of the foot black, the tip soiled flesh-color. Breathing-hole surrounded by a 

 dark circle. 



Diameter, 0-8 -0-85. Height, 0-5 -0-6. 



I am indebted to Col. Totten of the United States Engineers, for my acquaintance with 

 this species, which he found near the shores of the St. Lawrence, two hundred miles below 

 Quebec. As it was certainly new to this country, I described it in my notes several years 

 ago under a distinct name, which it is now unnecessary to quote. Mr. Binney, who published 

 the first description of the species under the name of subglobosa, had only the variety desti- 

 tute of bands. Its resemblance to the European nemoralis, but more particularly to hortensis, 

 is very striking, but the spire is not so acute. As far as is yet known, it seems to be restricted 

 to the neighborhood of the sea ; a fact which I am far from supposing to afford corroborative 

 proof of its being a European species. It has been noticed near Portland in Maine, and at 

 Cape Cod in Massachusetts. I have not yet found it in this State, but I have reason to 

 believe that it may be found along our maritime border. I understand that Mr. Binney 

 concurs with Dr. Gould in believing it to be identical with the hortensis of Europe. 



