100 THE NAUTILUS. 



it has been decnied unnecessary to repeat details of this kind which 

 have been piililished elsewhere. Many species are considered by the 

 author to be identical with those of Europe ; some of these are 

 considered distinct by good authorities, and pending sufficient 

 anatomical comparisons, are retained as varieties. A distinction is 

 also drawn between " forms" and '"varieties." 



LIMACID^. 



Agriolimaxmmpestrib var. montanvs(\\ig.'), Grand Co. (Ingersoll), 

 AgrioUmax ^lorch presents differences from Limax proper which are 

 probably to be considered generic. A. montanus cannot be distin- 

 guished from campestris by external characters, and I do not think 

 its anatomical ones warrant specific separation. 



A. campestris montauns form castmieus (Ing.) Blue River Valley 

 (Ingersoll). Probably only a young example of montanus, and 

 certainly no better than a variety. Vide J. of Conch. V, 358. 



A. campestris montanus form typicus Ckll. Custer Co. ; Chaffee 

 Co.; Saguache Co. ; Fremont Co. (Canon City) ; Summit Co. ; Eagle 

 Co. ; Mesa Co. ; Gunnison Co. 



A. campestris montamis form intermedius Ckll. Saguache Co.; 

 Fremont Co. (Canon City) ; Pueblo Co. (Wales Canon) ; Custer Co. 

 (Wet Mountain Valley) ; Summit Co. ; Mesa Co. ; Delta Co. 



A. campestris montanus form tristis Ckll. Lake Co. ; Sumnjit Co. ; 

 Delta Co. A few specimens of ^. agrestis and Helix nemoralis, from 

 Burlington, Xew Jersey, have been liberated at West Cliff", Custer 

 Co. 



Vitrina pelhicida var. limpida (Gould). White Earth River 

 (Ingersoll) ; Dillon, Summit Co. ; Swift Creek, Custer Co. ; Grand 

 Mesa, Mesa Co. ; Wales Canon, Pueblo Co. ; Cottonwood Gulch, 

 Saguache Co. ; near i\Iam ]Mts., Mesa Co. ; West Fork of Surface 

 Creek, Delta Co. ; South Park (Yarrow). 



V. pfeifferi Newc. Head of Gunnison River (Binney) ; San 

 Juan Co. (Ingersoll) ; E. Fork Arkansas River, Lake Co. ; near 

 Cattle Creek, Garfield Co. ; near Mam Mts., Mesa Co. ; Breckenridge 

 (Hy. Prime) ; Rock Creek, Routt Co. ; Fort Garland (Yarrow) ; 

 Twin Lakes (Yarrow-). 



Hyalina nitida (Miill.) High alpine (Carpenter), needs con- 

 firmation. 



Hyallna arborea (Say). San Juan Co. (Ingersoll) ; AVilliams 

 Canon, Manitou (M. E. Cusack) ; South Park (Yarrow) ; Twin 



