ART. 12 REVISION OF LIZARDS OF GENUS CTENOSAURA BAILEY 17 



CTENOSAURA HEMILOPHA (Cope) 



Plate 5 



Iguana acanthura Blainville, 1835, Nouv. Ann. Mus., vol. 4, p. 288, pi. 24, fig. 1. 



Cyclura acanthura Dumeril and Bibron, 1837, Erp^tologie Gen6rale, vol. 4, p. 

 22 (part).— Yarrow, 1883, Bull. 24, U. S. Nat. Mus., pp. 11, 71.— Belding, 

 1887, West. Amer. Scientist, vol. 3, No. 24, p. 98. 



Ctenosaura species Baird, 1859, Proc. Acad. Nat. Sci. Philadelphia, p. 300. 



Cyclura (Ctenosaura) hemilopha Cope, 1863, Proc. Acad. Nat. Sci. Philadelphia, 

 p. 105-106; (Type locality, Cape St. Lucas, Lower Cal.); 1875, Bull. No. 1, 

 U. S. Nat. Mus., pp. 50, 93.— Yarrow, 1883, Bull. 24, U. S. Nat. Mus., pp. 11, 

 71, 189.— Garman, 1884, Bull. Essex. Inst., vol. 16, No. 1, p. 19.— Belding, 

 1887, West. Amer. Scientist, vol. 3, No. 24, p. 98. 



Ctenosaura hemilopha Cope, 1866, Proc. Acad. Nat. Sci. Philadelphia, id. 312. — 

 Boulenger, 1885, Cat. Lizards Brit. Mus., vol. 2, p. 197. — Cope, 1886, Proc. 

 Amer. Philos. Soc, vol. 23, p. 266; 1886, Proc. Acad. Nat. Sci., Philadelphia, 

 p. 312; 1887, Bull. 32, U. S. Nat. Mus., p. 33.— Van Denburgh, 1895, Proc. 

 California Acad. Sci., ser. 2, vol. 5, p. 88. — Mocquard, 1899, Nouv. Arch. Mus. 

 Hist. Nat. Paris, ser. 4, vol. 1, p. 300.— Cope, 1900, Rept. U. S. Nat. Mus. for 

 1898, p. 238, fig. 17.— DiTMARS, 1907, Reptile Book, p. 107.— Townsend, 



1916, Bull. Amer. Mus. Nat. Hist., vol. 35, p. 430. — Stejneger and Barbour, 



1917, Check list, N. Amer. Amph. Rept., p. 44. — Van Denburgh and Slevin, 

 1921, Proc. California Acad. Sci., ser. 4, vol. 11, No. 4, pp. 50, 55. — Nelson, 

 1921, Mem., Nat. Acad. Sci., vol. 16, No. 1, pp. 84, 114, 115, 123.— Terron, 

 1921, Mem. 7, Rev. Soc. Cient. Antonio Alzate, vol. ;;9, pp. 164, 165, 168.— Van 

 Denburgh, 1922, Occ. Papers California Acad. Sci., No. 10, Rept. West. N. 

 Amer., vol. 1, p. 66. — Stejneger and Barbour, 1923, Check list N. Amer. 

 Amph. Rept., ed. 2, p. 42. 



Ctenosaura acanthura Bocourt, 1874, Miss. Sci. Mex. Reptiles, p. 138. 

 Ctenosaura interrupta Bocourt, 1882, Le Naturaliste, vol. 2, No. 6, p. 47. 

 Cyclura teres Yarrow, 1883, Bull. 24, U. S. Nat. Mus., pp. 11, 71. — Belding, 



1887, West. Amer. Scientist, vol. 3, No. 24, p. 98. 

 Ctenosaura conspicuosa Dickerson, 1919, Bull. Amer. Mus. Nat. Hist., vol. 41, 



Art. 10, p. 461.— Nelson, 1921, Mem. No. 1, Nat. Acad. Sci., vol. 16, p. 171. 

 Ctenosaura insvlana Dickerson, 1919, Bull. Amer. Mus. Hist., vol. 41, Art. 10, 



pp. 462, 463.— Nelson, 1921, Mem. Nat. Acad. Sci., vol. 16, No. l,"pp. 114, 



115, 171. 



Type.— From 4 cotypes, No. 529, U.S.N. M. 



Type locality. — Cape St. Lucas, Lower California, Mexico; John 

 Xantus, collector. 



Diagnosis. — Dorsal crest confined to anterior three-fourths of back, 

 shoulder, and neck region ; never continued on the posterior fourth of 

 back. Four or five black blotches on vertebral line, separated by 

 areas paler than the general tint. First black marking small, second 

 broader than long and faintly continuous with the blackish brown on 

 the ventral surface. Fifth almost confined to the median scales. 



Distribution. — This species occurs in the southern two-thirds of the 

 Lower California Peninsula, specimens having been taken at Cape 

 St. Lucas (the type), San Jose del Cabo, Mu-aflores, La Paz, San 

 88910—28 2 



