22 



In view of the relatively warm water character of the associated 

 mollusca this is hardly probable. 



American Pleistocene records of Juniperus comprise wood from 

 the Don Valley in Ontario, and from Humboldt County, Cali- 

 fornia ; and seeds from the Talbot formation of New Jersey. 



District of Columbia 



In an excavation on the southeast corner of North Capitol and 

 Pierce Sts., Washington, N. E., a black muck with drift wood, of 

 Talbot age, lies unconformably on the Potomac Cretaceous. 

 Speciments of the wood, collected by Laurence La Forge, were 

 sectioned and the wood determined to be that of the Taxodium 

 distichum, the existing bald cypress. This species has been found 

 fossil at numerous Pleistocene localities in the southeastern 

 United States; and stumps in situ, seeds, and cone scales were 

 common in the excavation at Connecticut Avenue and De Sales 

 Street, N. W.* The present locality is a considerable distance 

 northwest of the inland limit of range of this species at the 

 present time. 



At an excavation at 17th & K. Sts., Washington, N. W., from 

 a carbonaceous muck of the same age as that encountered at 

 Connecticut Ave., & De Sales St., that is, belonging to the 

 Wicomico formation, Arthur Keith collected several character- 

 istic husks and a nut of what proves to be Hicoria ovata Britton, 

 (figures 5-7). This species has been recorded previously from the 

 Pleistocene of Pennsylvania and North Carolina. 



In the recent flora it is found from the valley of the St. Law- 

 rence southward along the uplands to western Florida. In the 

 latitude of the District of Columbia it does not occur in the 

 Coastal Plain but is confined to the Piedmont and Mountain 

 zones, although it is recorded from the Potomac valley within 

 the northwestern limits of the District. 



Virginia 



Messrs. Maddren, Messier and Mansfield of the U. S. Geolog- 

 ical Survey collected cones of Pinus echinata Miller from the 

 Talbot formation on the left bank of the Rappahannock River, 

 1 3^ miles below Taft P. O. in Lancaster County. This species 



* Berry, E. W., Jour. Wash. Acad. Sci. 14: 15, pi. i figs. ^7-42; pi. 3, 1924. 



