n. PHRYNOSOMA 401 



toad and approached to smell of it. When the dog had 

 drawn near, the lizard shot a stream of blood from one eye. 

 Droplets of blood were sprinkled over the dog's head, and 

 he quickly withdrew, shivering with disgust, and could not 

 be induced to approach the lizard again. The blood has no 

 odor which I could detect, and is not poisonous when injected 

 into pigeons. 



80. Phrynosoma cerroense Stejneger 

 Cerros Island Horned Toad 



Phrynosoma Belding, Proc. U. S. Nat. Mus., Vol. 5, 1883, p. 530. 



Phrynosoma hernandezi Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, 

 p. 68 (part); Belding, West Amer. Scientist, Vol. Ill, No. 24, 

 1887, p. 99. 



Phrynosoma cerroense Stenjeger, N. Amer. Fauna, No. 7, 1893, p. 187 

 (type locality, Cerros Island, Lower California); Van Den- 

 burgh, Proc. Cal. Acad. Sci., Ser. 2, Vol. 5, 1895, p. 119; Cope, 

 Report U. S. Nat. Mus. for 1898, 1900, p. 428, fig. 75; Van Den- 

 burgh, Proc. Cal. Acad. Sci., Ser. 3, Zool., Vol. 4, No. i, 1905, 

 PP- 3) 23; Ditmars, Reptile Book, 1917, p. 151; Van Denburgh 

 & Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. 4, 1914, pp. 132, 144; 

 Stejneger & Barbour, Check List N. Amer. Amph. Rept., 1917, 

 p. 58; Nelson, Mem. Nat. Acad. Sci., Vol. XVI, 1921, pp. 114, 

 130. 



Phrynosoma schmidti Barbour, Proc. New England Zool. Club, Vol. 

 VII, 1921, p. 113 (type locality, Cerros Island, Lower Califor- 

 nia, Mexico). 



Description. — Nostrils excessively large, opening on lines 

 joining superciliary ridges with end of snout. Head spines 

 large} four temporals, the short anterior one beneath the 

 eye separated from the second by a low tubercle j one occi- 

 pital, and one postorbital, on each side, one small inter- 

 occipital, reduced to a tubercle. No row of small spines 

 between temporals and eye. Four conic scales in front of 

 occiput. Other upper head scales flat, rugose, central ones, 



