isGEssoLL.] ZOOLOGY HELICIN^. Odl 



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

 thicker shell. 



Falula soUtaria, Say. — Coeur d'Alene Mountains, 2,500 feet {Cooper ; 

 Hemphill.) Mississippi Valley. 



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

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



Patula EemphUli, ISTewc. — White Pine, Nevada, 8,000 feet [Hemphill). 



Patula idahoensls, Newc. — Between Idaho City and Coeur d'Aleue 

 Mountains {Hemphill). 



Fatula Saydeni, Gabb. — Weber Caiion, Utah {F. Y. Hayden). Sub- 

 fossil only. 



The above-mentioned species of Fatula, viz : Cooperi, soUtaria, strigosa, 

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



" Fatula 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 cariuated torm described 

 as P. HempMlH. The non-carinated 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 Eiver, 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 comijared with P. soUtaria. In the group 

 of species of Fatula 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. 



Fatula Sornii, Gabb. — Fort Grant, Arizona {Horn). 



Patula Cronkhitei, Newcomb. 



Camp 9 : Hot Springs 14 specimens. 



Camp 11 : Blue Eiver Valley 20 specimens. 



Camx) F : Eio La Plata 15 specimens. 



Eecorded from Klamath Valley, Oregon {Gahh)', 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. 



Montanai^ {Cooper); Hell-Gate Eiver, Montana {Binney and Bland); 

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



Helix (Microphysa) IngersoUi, Bland. Ann. N. Y. Lye. N. R., vol. XI, 

 151 5 June, 1875. 



^'' Shell umhilicated, discoidal, thin, translucid, nearly smooth, white; 

 spire flat, summit sulmnmersed ; suture impressed; whorls 5^, rather con- 

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

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



