OCT., 1899] BOREAL SPECIES OF SHASTA AND SIERRA-CASCADES. 71 



species that occur on Shasta, with reference to their occurrence in tiie 

 Sierra or Cascades or both; and (h) Boreal species that occur on the 

 Sierra or the Cascades or both, but which, so far as known, are absent 

 from Shasta. 



BOREAL SPECIES OF SHASTA CONSIDERED WITH REFERENCE 

 TO THEIR PRESENCE OR ABSENCE IN THE SIERRA AND THE 

 CASCADES. 



The boreal mammals, birds, and ])lants of Shasta have been grouped 

 in four categories* (1) species common to Shasta and the Sierra-Cas- 

 cade system as a whole: (2) species common to Shasta and the Sierra, 

 but not known from the Cascades; (3) species common to Shasta and 

 the Cascades but not known from the Sierra^ and (4) Shasta species not 

 known from either the Sierra or the Cascades. 



Thirty-six distinctively IJoreal mammals are known from Shasta, 

 includino- the boreal species which range down into or through the 

 Transition zone. Of these, 20 are common to the Sierra on the south 

 and the Cascades on the north, 7 are common to Shasta and the Sierra 

 but are not known from the Cascades, 1 is common to Shasta and the 

 Cascades but is not known from the Sierra, and 2 are peculiar to 

 Shasta. 



Of the 30 distinctively Boreal mammals of Shasta, 17 are believed to 

 be exclusively boreal. Of these, 12 are common to the Sierra and the 

 Cascades, 4 are common to Shasta and the Sierra but are not known 

 from the Cascades, 1 is peculiar to Shasta, but not one is common to 

 Shasta and the Cascades which does not occur also in the Sierra. 



Forty-seven distinctively Boreal birds are known from Shasta, includ- 

 ing' the boreal species which range down into or through the Transition 

 zone. Of these, 41 ai e common to the Sierra and the Cascades, 4 are 

 common to Shasta and the Sierra but are not known from the Cas- 

 cades, and 2 are common to Shasta and the Cascades but are not known 

 from the Sierra. 



Of the 47 distinctively Boreal birds of Shasta, 22 are believed to be 

 exclusively boreal. Of these, 18 are comiuon to the Sierra and the Cas- 

 cades, 2 are common to Shasta and the Sierra but are not known from 

 the Cascades, and 2 are common to Shasta and the Cascades but are 

 not known from the Sierra. 



One hundred and twelve distinctively Boreal plants are known from 

 Shasta, including- the boreal species which range down into or through 

 the Transition zone. Of these ~)~) are common to the Sierra and the Cas- 

 cades; 31 are common to Shasta and the Sierra but are not known 

 from the Cascades; 10 are common to Shasta and the Cascades but 

 are nol; known from the Sierra, and S occur on Shasta which are not 

 known from either the Sierra or the Cascades. 



Of the 112 distinctively Boreal plants of Shasta, 101 are believed to 

 be exclusively boreal. Of these, 47 are common to the Sierra and the 

 Cascades; 28 are common to Shasta and the Sieira but are not known 



