ingessoll.] ZOOLOGY HELICIN^. 397 



places, in that the latter had a paler, more bleached appearance, and a 

 thicker shell. 



Patula solitaria, Say. — Cceur d'Alene Mountains, 2,500 feet (Cooper ; 

 Hemphill.) Mississippi Valley. 



Patula strigosa, Gould. — Western New Mexico to the Big Horn Mount- 

 ains of Nebraska (Binney and Bland); Montana to Arizona (Cooper). 



Patula Hemphilli, Newc. — White Pine, Nevada, 8,000 feet (Hemphill). 



Patula idahoensis, Newc. — Between Idaho City and Cceur d'Alene 

 Mountains (Hemphill). 



Patula Haydeni, Gabb. — Weber Canon, Utah (F. V. Hayden). Sub- 

 fossil only. 



The above-mentioned species of Patula, viz: Cooperi, solitaria, strigosa, 

 Hemphilli, idahoensis and Haydeni, are remarkably connected in form. 



" Patula Haydeni, which may be considered as extinct, is distinguished 

 by its carina and equally 'prominent, elevated, revolving ribs.' It is 

 allied to P. strigosa, and more especially to the carinated iorm described 

 as P. Hemphilli. The non-earinatecl P. strigosa is variable, sometimes 

 difficult to be distinguished from depressed varieties of P. Cooperi. The 

 rather strongly-ribbed variety of the latter, from Bear Biver, Utah, 

 connects P. idahoensis with this group. In some specimens of that 

 species, the obsolete carina may be observed on the periphery between 

 the strongly-elevated oblique (not revolving) ribs. The more globose 

 forms of P. Cooperi may be compared with P. solitaria. In the group 

 of species of Patula referred to, the alliances, indicated however by 

 the shells alone, are associated with well-marked specific differences in 

 the genitalia; in other groups, Mesodon, for instance, in the dentition. 

 Mr. W. G. Binney has lately directed attention to this interesting 

 point."— Thos. Bland, letter of March 16, 1875. 



Patula Hornii, Gabb. — Fort Grant, Arizona (Horn). 



Patula Cronkhitei, Newcomb. 



Camp 9 : Hot Springs 14 specimens. 



Camp 1 1 : Blue Biver Valley - . . 20 specimens. 



Camp F : Bio La Plata 15 specimens. 



Becorded from Klamath Valley, Oregon (Gabb)-, White Pine Mount- 

 ains, Nevada, and Northern Utah (Hemphill). 



Patula striatella, Anthony. 



Camp 9 : Hot Springs 20 specimens. 



Camp 19 : Saguache 5 specimens. 



Camp 24 : Clear Creek 20 specimens. 



North Park (Barber) , 5 specimens. 



Montana? (Cooper); Hell-Gate Biver, Montana (Binney and Bland); 

 Estes Park, Colorado (Carpenter). Eastern United States. 



Helix (Mierophysa) Ingersolli, Bland. Ann. N. Y. Lye. N. H, vol. XI, 

 151 ; June, 1875. 



"Shell umbilicated, discoidal, thin, translucid, nearly smooth, white; 

 spire flat, summit subimmersed ; suture impressed; whorls 5£, rather con- 

 vex, slowly increasing, the last not descending, more convex below the periph- 

 ery ; breadth of umbilicus nearly one mill.; aperture subvertical, higher 



