90 CALIFORNIA ACADEMY OF SCIENCES. 



23. Phrynosoma douglassii (Bell). PIGMY HORNED 

 TOAD. 



Agama Douglassii, BELL, Trans. Linn. Soc., XVI, p. 105, pi. X(type 

 locality Columbia River). 



Phrynosoma douglassii, GIRARD, Stansbury's Exped. Gt. Salt Lake, 

 1853, p. 362, pi. VII, figs. 6-10. 



Phrynosoma douglassi pygmcea, YARROW, Proc. U. S. Nat. Mus., V. 

 1882, p. 443 (localities Ft. Walla Walla, Wash. ; Des Chutes 

 River, Oreg.; Ft. Steilacoom): YARROW, Bull. U. S. Nat. 

 Mus., No. 24, 1882, p. 70 (type locality stated as Des Chutes R., 

 Oreg.); TOWXSEND, Proc. U. S. Nat. Mus., X, 1887, p. 238. 



Description. Nostrils opening on lines joining super- 

 ciliary ridges with end of snout. Gular scales small 

 and nearly equal-sized. A series of enlarged sublabial 

 scales not much larger than infralabials, separated from 

 latter by several rows of granules. Head-spines very 

 short; four or five temporals, one occipital, and one 

 postorbital on each side. Occipital spines nearly erect. 

 Supralabials small but prominent. Infralabials slightly 

 larger than supralabials and continued farther back, 

 becoming gradually spinose. Other head-scales small, 

 irregular in size and arrangement, more or less convex, 

 and roughened with ridges and granulations. Two 

 groups of spines on neck, upper being larger. Back, 

 tail, and upper surfaces of limbs with scattered, large, 

 more or less erect, keeled, tubercular scales; between 

 these, skin covered with smaller scales and granules. 

 Body with fringe of one series of peripheral spines. 

 Chest and belly and lower surfaces of hind limbs and tail 

 covered with small smooth scales. Tympanum either 

 naked or scaled. Long series of femoral pores almost 

 meet medially. Males sometimes with enlarged postanal 

 plates. 



The back is olivaceous, yellow, brown, gray, or slate, 

 with two or four rows of dark blotches. These blotches 

 vary greatly in intensity but are almost always edged 



