96 LAND AN1> FRESH'WATER SHELLS STEARNS. 



Helix (Patula) strigosa Gld. 



Wyoming, Bridger's Pass, May, 1890 (Mas. No. 118)74); also in the TTintah and Wah- 

 satcb Mouutains at Park City, Utah, June, 1890. Veruou IJailey. (Mus. No. 

 118371.) 



Several characteristic examples were found by Mr. Bailey "on the 

 hills along the caiiou " at the first-named locality. 



Helix (Patula) hemphilli Newc. 



Needle Peak, Lost River Mouutains, Idaho, " among rocks at an altitude varying from 

 8,000 to 11,000 feet." Bailey & Dutcher, August, 1890. (Mus. No. 118392.) 



Sev^eral examples of this form, now regarded as an extreme variety 

 of the i^rotean strigosa, were detected as above by Dr. Merriam's col- 

 lectors. Compared with the typical strigosa, its relations are analogous 

 to those of iT^. {Patula) Cnmberiandiana Lea to H. {Patula) alternata of 

 Say. Of the direct gradation of the alleged species, more properly 

 intermediate and blending varieties, to which the names of Fergusoni 

 mordax and Gumherlandiana have been given, it may be said that a 

 sufficiently large series tells its own story, and the examples in the Na- 

 tional Museum point to such a connection. 



Helix (Polygyra) texasiana Mor. 



Texas, near Sanderson (Mus. No. Ilte364); vicinity of Eagle Pass (Mus. No. 120346); 

 Comstock (Mus. No. 118401) ; also at Painted Cave, near the mouth of the Pecos 

 (Mus. No. 118390). William Lloyd. Del Rio, on dryland in the valley of the 

 Rio Grande (Mus. No. 118369), Vernon Bailey. 



Several examples of the fiat variety of this well-known snail shell, 

 with the sculpture only moderately developed, were obtained at San- 

 derson. The others are as usual as to elevation and sculpture. 



Helix (Pomatia) humboldtiaiia Val. 



Texas, at Altuda, at an elevation of 5,000 feet, ^vlicre it, a single specimen in fair con- 

 dition, had been thrown out with soil by a prairie dog. (Mus. No. 118366.) 

 William Lloyd. 



This species has not before been reported from any locality within 

 the territory of the United States. It was described from Mexico 

 where it is found in the neighborhood of the City of Mexico and in 

 other localities. The national collection contains several exami)les 

 from the Real del Monte. It has a pretty close resemblance to some of 

 the varieties of the European H. {Pomatia) pomatia, and it may possi- 

 bly be an introduced form. H. pomatia has for centuries been esteemed 

 as an article of food in various jjarts of Europe, and was regarded as 

 a dainty by tbe ancient Romans. It was propagated and raised iu 

 large quantities for their use and specially fed on certain plants to 

 give the flesh a particular flavor. 



Unmistakable specimens of another favorite edible snail common to 

 Europe, H. {Pomatia) as^ersa, is found in Mexico, and examples from 



