306 UNIVERSITY OF COLORADO STUDIES 



D. rubescens Penard — Bald Mtn. (Penard). Peculiar for having the plasma of a beauti- 

 ful brick-red color. 

 Euglypha ciliata Leidy, E. cristata Leidy, E. compressa Carter and E. laevis Perty — all 



near Caribou (Penard) ; E. ciliata also on Bald Mtn. 

 Glenodinium cinctum — near Caribou (Penard). 

 Heleopera rosea Penard — near Caribou, and Bald Mtn. (Penard). 

 Heterophrys sp. — near Caribou (Penard). 

 Lacrymaria truncata Stokes — Boulder, 1908 (R. Keating). I sent a sketch to Dr. Edmond- 



son, who thinks it is L. truncata; it is hardly typical, but he has found that species 



very variable. 

 Lecquereusia jurassica Schlumberger — near Caribou (Penard). 

 Nebela collaris Leidy, N. longicollis Penard, N. tubulosa Penard and N. dentistoma 



Penard, all near Caribou (Penard). All except tubulosa also on Bald Mtn. 



It appears that the prior name for N. longicollis is N. barbata Leidy. 

 Paramoecium trichium Stokes — Fawcett's Greenhouse, Boulder, 1908 (Cockerell; det. 



Edmondson). 

 Peridinium tabulatum (Ehr.) — near Caribou (Penard). 

 Petalomonas mediocanellata Stein — Fawcett's Greenhouse, Boulder, 1908 (Cockerell; det. 



Edmondson). 

 Pseudochlamys patella Clap. & Lach. — near Caribou and Bald Mtn. (Penard). 

 Quadrulella ( = Quadrula Sch., not Rap.) symmetrica (Wallich) — near Caribou (Penard). 

 Sphenoderia dentata Penard^near Caribou (Penard). 

 Stylonychia sp. — Fawcett's Greenhouse, Boulder (Cockerell). "Seems to be identical 



with the form mentioned on p. 102, Protozoa 0} Iowa, and also referred to in Conn's 



work" (Edmondson). 

 Trinema lineare Penard, T. enchelys var. galeatum Penard and T. complanatum Penard, 



all near Caribou (Penard). T. lineare also on Bald Mtn. 



Dr. Penard has very generously presented to the University a series 

 of 43 slides of Rhizopods from Switzerland, for comparison with our 

 Colorado fauna. He writes that as early as 1899 he had discovered a 

 Rhizopod fauna at the bottom of the Swiss lakes, including a number 

 of species totally absent from shallow waters of the plains. He sug- 

 gested at the time that these might be the remnants of a fauna existing 

 in glacial times, and raised the question whether they might not be 

 found in small lakes and ponds, very high in the mountains. At the 

 time, nobody seemed to attach any value to this theory; but more 

 recently, through the researches of Zschokke, Monti and others, it 

 appears to be confirmed. At least half a dozen of the deep-water 

 species have occurred at very high altitudes, while they have not been 

 found in shallow waters in the lowlands. Dr. Penard therefore raises 

 the question, whether these deep-water species may not also occur in 



