142 3. IGUANIDM 



Remarks. This species differs from all other known 

 members of this genus in having a fringe of spinous scales 

 along the posterior surfaces of the second, third and fourth 

 digits. This is similar to the arrangement seen in Uma, 

 but differs in that the fringe in C. crinitus is on only one 

 side of each digit. C. crinitus has no ear valve, such as is 

 seen in Uma. Its coloration is somewhat intermediate 

 between that of C. ventralis ventralis and Uma notata y but 

 more like the former. 



Distribution. This species was first recorded from a 

 specimen collected at Ballenas Bay on the Pacific side of 

 central Lower California. A second specimen has since 

 been taken at Abreojos Point, the northern point of Ballenas 

 Bay, and seven others at San Bartolome Bay 100 miles far- 

 ther north, also on the Pacific shore of the peninsula. 



22. Callisaurus draconoides draconoides (Blainville) 

 SAN LUCAN GRIDIRON-TAILED LIZARD 



Callisaurus draconoides BLAINVILLE, Nouv. Ann. Mus. Hist. Nat. Paris, 

 Vol. IV, 1835, p. 286, pi. XXIV, fig. 2 (type locality, "Cali- 

 fornia") DUMERIL et BIBRON, Erpetologie Generale, Vol. IV, 

 1837, p. 326; GRAY, Cat. Lizards Brit. Mus., 1845, p. 227; BO- 

 COURT, Miss. Sci. Mex., Kept. 3e livr., 1874, p. 158, pi. XVII, bis., 

 figs. 10-10b; STEJNEGER, N. Amer. Fauna, No. 7, 1893, p. 171; 

 VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 5, 1895, pp. 95, 

 98; DICKERSON, Copeia, No. 50, 1917, p. 97; STEJNEGER & BAR- 

 BOUR, Check List N. Amer. Amph. Kept., 1917, p. 47; VAN DEN- 

 BURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. 

 51, 57; NELSON, Mem. Nat. Acad. Sci., Vol. XVI, 1921, pp. 

 114, 115. 



Callisaurus ventralis BAIRD, Proc. Acad. Nat. Sci. Phila., 1859, p. 299. 



Callisaurus dracontides COPE, Proc. Acad. Nat. Sci. Phila., 1866, p. 312; 

 COPE, Bull. U. S. Nat. Mus., No. 32, p. 38. 



Callisaurus dracontoides dracontoides COPE, Bull. U. S. Nat. Mus., No. 1, 

 1875, pp. 47, 93; YARROW, Bull.U. S.Nat. Mus., No. 24, 18 83, p. 50; 



