No. 479] EXTINCTION OF MAMMALIA 



791 



courses, taken by cattle and sheep; the white loco (AragalUis), 

 taken h\ horses, sheep, and cattle. liiipines (Lupinus) in cer- 

 tain stages of growth are poisonous to sheep. P>got {Claviceps 

 purpurea), occurs in Montana on a variety of grasses, and is occa- 

 sionally poisonous to horses and cattle, producing a disease of 

 the limbs. (.)ri a large ranch of Wyoming, ergot is reported 

 CWalter (iranger, letter, 1904) to have appeared as a result of 

 irricjatlon rendering a large tract fatal to horses and cattle by 

 causing a disease of the hoofs. 



A leguminous plant of Egypt, Lotus arahicus, recently investi- 

 gated by Dunstan and Henry, ^ as a growing plant, is ((nitc poison- 

 ous to horses, sheep, and goats. Its seeds when ripe are conunonly 

 used as fodder. It contains a gliicecoid termed 'lotusin,' which 



