119 
U231 Fossil diatoms under a peat "bog, Aberdeenshire, Scotland 
U232 Fossil diatoms; Oregon; no. 59; Fremont's Report 
U233* Recent polythalamia, etc.; Isle of Delos; C. Stokes 
U235* Limestone with polythalamia; Mount of Olives, [North Carolina ?] 
U236* Recent polythalamia, Manila, Philippines 
U24l* Lower end of St. Mary's County,- Maryland 
U244* Williamsburg, Virginia 
U246* Suisun Bay, 25-30 miles above San Francisco, California 
U247* Meherrin River, Virginia; fossil diatoms 
U248 Concord, Massachusetts; Prof. Hitchcock's collection 
U249 Nova Scotia; Dr. Leidy 
U253 Blue Hill Pond, Maine 
U254 Duval's Creek, Enterprise, Florida; cleaned with K0 and"ignited 
U255 Lower end of St. Mary's County, Virginia 
U268 Diatoms, Recent infusoria; River Humber and adjacent salt water 
ditches, England 
U273 Fossil diatoms; Piscataqua, Maryland 
* Unmounted samples in vials are in the collection in addition to slides 
