51 



Of the plants listed, too many are from the uplands to 

 admit of a significant comparison. 



Of the mammals given, five of the eight of Transitional 

 occurrence are found here: 



Sylvilagus floridanus mearnsi Allen Cottontail 



Sduropterus volans volans (Linn.) Southern Flying Squir- 

 rel 



Sdurus hudsonicus loquax Bangs Southeastern Red 



Squirrel 



Peromyscus leucopus novehoracensis 



(Fischer) Deer Mouse 



Eptesicus fuscus fuscus (Beauvois) Brown Bat 



Two of the three having northern tendencies have been 

 found: 



Tamias striatus lysteri (Richardson) Northeastern Chip- 

 munk 

 Mustela cicognanii cicognanii 



(Bonaparte) Small Brown Weasel 



The Austral Zone is represented by only one mammal, 

 Pipistrellus suhflavus, and by one bird, Icteria virens, which 

 is found in the near vicinity. Of the Canadian mammals and 

 birds, none are known to breed within this area. 



In this connection it was deemed advisable to determine the 

 exact temperature conditions of the marsh. Accordingly, a 

 proper shelter was provided, and a recording thermograph 

 and hygrograph were installed. The "kiosk" was constructed 

 in such a way as to admit of the free passage of air and at the 

 same time to afford protection from the wind and the direct 

 rays of the sun. Each week, when the clocks of the instru- 

 ments were wound, the records were checked by means of a 

 maximum-minimum thermometer and a whirUng hygrometer. 

 By applying Merriam's (1909) laws of temperature control, 

 the sum of the mean daily temperatures above 43° F., from 

 June, 1909, to June, 1910, was found to be 13,350. The 

 normal mean temperature of the six hottest consecutive weeks 

 was 69.5° F. The corresponding temperatures for the Transi- 

 tion Zone, as given by Merriam, are 10,000 and 71.6° F., 



