80 NORTH AMERICAN FAUNA. [no.16. 



believe that the Sierra iiianiiot is really the only mamnial coiiniMm to 

 the Sierrai and the Cascades which does not occur on Shasta. 



Two boreal birds believed to be coniinon to the Sierra-Cascade 

 system (the western winter wren, Anorthura liioiKilis pacified, and the 

 Townsend warbler, Dendroiva townnenili) have not yet been discovered 

 on Shasta, but are liable to be found there at any time. 



With plants the case is (i[uite different, for at least 11) well-known 

 genera, and a considerable number of species of other genera, not 

 known from Shasta are common to the Sierra and the Cascades. 



(a) MA.AIMAI.S. 



Arctoinys tlaviveiiter. Giilo liisciis. Lasioiiyctoris iioctivagans. 



(ll) H1KI>S. 



Anorthura liiemalis pacifica. J)eu(lioica towiiseiidi. 



(c) I'I,AXTS. 



Genera not kuoicii from iShaata. 



Art-naria. Iris. IJauuiiciilus. 



Cassiope. Ivesia. Siiiolowskia. 



Claytonia. Listera. 8trei)topiis. 



Clintonia. jMcrtensia. Tluiru'tniiu. 



Erythrouiiiiu. Pedicnlaris. Xeropliylhmi. 



Geuiii. Priiiiiila. 



Henchera. Raillardella. 



AdiiitiotiaJ upevicb iiol huoicn J'nitti Sliasid. 



Arnica chamissonis. Loniccra in\olucrata. 



Campannla sconleri. I'olygoiuun bistortoides. 



Crepis nana. Populus treniuloides. 



Erigeron salsugiuosus. Salix barclayi. 



Geutiana ucwberryi. Saxifraya nivalis. 



JTincns ortliopbylliis. . Saxitrafza ])nii(tata. 

 T>ouicera conjugalis. 



(2) liOREAL SlERJiA SPECIES NOT KIS'OWN FROM ShA.STA OR THE 



Cascades. 



Eight mammals, 1 bird, 3 coniferous trees, several shrubs, and a num- 

 ber of small plants are known from the High Sierra which do not occur 

 on Shasta or the Cascades; the majority of them are restricted to the 

 southern part of the Sierra, not reaching as far north as the mountains 

 about Lake Tahoe, and consequently need not be considered here. 

 Only three of the Sierra mammals {Spermophihis hchliiKji, Eutamias 

 spccio.sii.s frairr, and Sorer ol>sciiri(s) whi(!h range north to the south 

 end of Feather liivcr (rap fail to reach Shasta, and two if not all three 

 of these are known to cross this gap and occur on Lassen, showing 

 that the Feather Kivei- Cap of itself is of very little signifu;ancc. The 

 details of ]>lant distiibulion in these jnouutains are not sutliciently 

 known to admit of safe generalizations. 



