1900] MICROSCOPICAL JOURNAL. 23 



Upper Lake Beds, south shore of Mono Lake, Cal. 

 Truckee River, near Wadsworth, Nev. 

 Three miles south of Helen's Springs, Nev. 

 Truckee River, five miles west of Wadsworth, Nev. 

 Iudian Reservation, banks of Truckee River, Nev. 

 Lake Bonneville, Utah. 



Playo Beds in Canon south end of Carson's Lake. 

 Lake Beds exposed near L. Symonds Ranch, Mono Lake. 

 Walker River, with fossil bones, two miles south of Alder 



Creek Valley. 

 Hot Springs, Lower Lake beds, Rash creek, Mono Lake. 

 Four miles north of Wadsworth, White Terrace, Marble 



Butte, Nev. 

 White Terrace, Pyramid Lake, Nev. 



White beds near First Point on north shore of Soda Lake. 

 From the Death Valley, Inyo county, California, infu- 

 sorial earth has been sent containing- Bacillariacre. It 

 came frome a hill 500 feet from Owens river, and f mile 

 from Bishop P. 0. It covers an extent of twenty acres. 

 The fresh-water Occidental sea once covered that place, 

 perhaps in Eocene time, and anterior to the strata of 

 Monterey and of Richmond, Va. This earth has yielded 

 among others : 



Diatoma flocenlosa in plants having immersed in it the 

 following : 



Amphora ovalis. 



Cocconema lanceolata. 



Cocconeis placentula. 



Epithemia gibba, hyndmanni, sorex, and turgida. 



Navicula foetida, and iridis. 



Roicosphenia curvata. 



Synedra capitata. 



A grayish clay from F. A. Connelly, Bishop, Cal., also 



yields those forms in small quantity proving that the clay 



was beneath the infusorial stratum. When forming, clay 



settled all over the Occidental Sea having more and more 



