880 Till: CHICAGO ACADEMY 01 SCIEN( 



the Transition life zone, while the Loess records arc confined to the 

 Carolinian division. The New Mexico record is probably to be con- 

 sidered from subfossil strata. 



Cooper's record is as follows r 1 



"Along a small branch of Walnut Creek, in Alameda County, 

 north of Livermore, is a deposit which contains chiefly living species, 

 and was formerly called Quaternary, but one extinct species has been 

 described from there, and its high elevation, nearly corresponding with 

 the bed last described, makes it probable that it may better be called 

 Pliocene." 



Further records will be of great interest in the light of recent 

 elucidation of the smaller species and varieties. 



RECORDS. 



LCESS. 



Illinois: Galena. Jo Daviess Co. (McGee); two miles south of Freeport, 

 Stephenson Co. (Smith. Inst.). 



Iowa: Loess of Iowa; North Hill, Burlington, Des Moines Co. (Keyes) ; 

 Des Moines, Polk Co. (McGee and Call); Iowa City. Johnson Co. (McGee; 

 Pilsbry; Shimek); Lcess of Iowa (Shimek) ; Johnson Co. (Webster). 



Nebraska : Loess of Nebraska (Shimek). 



FLORENCIA FORMATION. 



Illinois: Pecatonica River Valley, Stephenson Co. (Hersheyi. 

 marl deposits. 

 United States. 

 Maine: Mud Lake, Westmanland, Aroostook Co. (Nylander). 

 Michigan: Huron Co.; cascade near Grand Rapids. Kent Co.; Pickerel 

 and Fremont lakes, Newaygo Co. ; near Cedar Lake Station, Montcalm Co. 

 (Walker). 



Utah : Lake Bonneville (Gilbert). 



Wisconsin: Milwaukee, Milwaukee Co. (Baker; Slocum). 



British America. 

 Ontario : Hemlock Lake, near Edinburgh, east of Ottawa, Carleton Co., 

 in soft, white, calcareo-argillaceous matrix (Ami) ; near Ottawa (Heron). 



gravel beds. 

 New York: Goose Island, Niagara River. Erie Co. (Letson). 

 various pleistocene deposits. 

 United States. 

 Illinois : Old lake beach, Rockwell Street near Belmont Avenue. Chicago, 

 in sand (Jensen). 



Michigan : Two miles west of village of Buchanan. Berrien Co., in Baker- 

 town Marsh, associated with Mastodon remains (Smith) ; Niles, Berrien Co., 

 associated with Mastodon remains (Walker). 



l Proc. Cal. Acad. Sci i. IV. p. lfifi. 



