Protozoa 253 



being abundant in a spade-foot toad collected at Las Animas, 

 Colorado. The toad belongs to the subspecies Scaphiopus 

 hammondii bombifrons of Cope, with smooth skin and rounded 

 muzzle. It appears that the typical, more western and southern 

 S. hammondii has a different kind of parasite, which Metcalf 

 calls Protoopalina hammondii. This suggests that the two forms 

 of toad are really different species, and Metcalf so regards them. 



