388 PROCEEDINGS OF THE ACADEMY OF [May^ 



acute, somewhat labiate within, the columellar margin dilated above^ 

 vaultingly reflexed, nearly covering the perforation. Alt. 13, diam. 

 46 [typographical error for 16] mm. Variety: with a sharplj^ defined, 

 lengthened, tooth-like tubercle on the lower margin near the colu- 

 mella (fig. 16)." 



Pfeiffer's figure of the type, pi. XVI, fig. 51, and of the variety 

 pi. XVI, fig. 52, are copied photographically. 



This is a rather small species (diam. 17 to 20 mm.), compactly 

 coiled, rather solid though generally somewhat thin, opaque white 

 or very light brown, encircled with many blackish lines and narrow 

 bands, which are more or less interrupted or speckled with white. 

 The embryonic whorl is usually brown, rarely whitish. The surface 

 of several post-embryonic whorls is minutely granulated. The last 

 whorl is not distinctly striated spirally. Lip hardly expanded,, 

 narrowly thickened within, at the columella it is dilated, and white- 

 calloused within, the callus often ending abruptly below, or in form 

 of a small tooth. Whorls 5 in small, up to 5| in large individuals. 



Specimens in the Academy are from San Rosario (Orcutt!); San 

 Geronimo Island, fossil only (H. N. Lowe!); Lagoon Heads, Cerros 

 Island, and Turtle Bay (H. Hemphill!); Asuncion Island, fossil only 

 (Stearns). Also reported by Dall from Rosalia Bay, between the 

 second and third localities above. 



Pfeiffer records that this species was taken by Hinds in "Cali- 

 fornia." Hinds, on H. M. S. Sulphur, Capt. Belcher, visited Cali- 

 fornia and Lower California, stopping October 28, 1839, at Turtle 

 Bay, which is another name for S. Bartolome Bay, or Port, a good 

 harbor a short distance below the projection of the peninsula below 

 Cerros Island. As Hemphill found the species here in some abun- 

 dance, I propose to select Port San Bartolome as the t3^pe locality. 

 The Sulphur landed a party at this place to make observations for 

 position. The geological features and marine shells are mentioned 

 in Captain Beechey's narrative (Vol. I, p. 330), and I think it almost 

 certain that Hinds, who was a good collector and conchologist^ 

 picked up the Helix levis here. 



Small specimens, such as pi. XVI, fig. 45, and others of the same 

 lot agree perfectly with Pfeiffer's description and his type figure. 

 Others from Turtle Bay, such as figs. 42, 43, are larger, more elabo- 

 rately decorated, and show more of a columellar tooth. 



Shells from San Rosario, Cerros Island (fig. 44), and Lagoon Heads, 

 are practically identical with those from Turtle Bay. All of these 

 places except Cerros Island are on the mainland. Other localities. 



