250 



H. L. SHANTZ. 



elevation of 2,3 17 m. These specimens were found " in an eroded 

 limestone bowl in a canyon always dry except after showers. 

 The bowl will hold a half dozen tubs of water and is rarely entirely 

 dry." This collection was sent to Doctor Ward and was identi- 

 fied by the writer. It contained 10 males and 6 females. This 

 record greatly extends not only the known geographical distri- 

 bution of this species, but also its vertical distribution. It now 

 belongs with B. coloradensis and B. paludosa to the short list 

 (Zschokke, 1900 : 188) of Phyllopods already recorded in alpine 



1 Verrill originally thought these distinct species ; his measurements are given in these columns. 



2 Sars places the maximum limit at 23 mm. Measurements are all in millimeters. 



situations. This material was carefully measured and compared 

 with the material of B. coloradensis and also with the measure- 

 ments and descriptions of B. paludosa as given by Verrill (1870), 

 Packard (1883) and Sars (1896). The results of these measure- 

 ments are given in the above table : 



It is clear from the measurements that B. coloradensis and B. 



