196 IGtTANID^, 



Cyclura articulata, Wiegm. I. c. p. 43. 

 — — denticulata, Wiegm. I. c. pi. iii. 



Ctenosaura pectinata, Coije, Proc. Ac. Philad. 1866, p. 124 ; Bocourt, 

 I. c. p. 140. 



teres, Bocowt, I. c. p. 142. 



completa, Bocoitrt, I. c. p. 145, 



Scales on the body small, smaller, or scarcely smaller on the back 

 than on the belly ; the dorsal scales may be perfectly smooth or ob- 

 tusely keeled. Dorsal crest more or less developed, continuous with 

 the caudal or interrupted on the sacrum. Tail cylindrical or feebly 

 compressed, "with annuli of more or less strongly spinose large scales 

 separated by rings of smaller scales ; the latter maybe almost smooth 

 or strongly keeled. Four to eight femoral pores on each side. 

 Greyish, brownish, olive, or green, darker above, with blackish 

 variegations usually forming more or less regular cross bands on 

 the body and rings on the tail ; some specimens (e-f) entirely 

 blackish. 



Lower California and Central America. 



The specimens enumerated hereafter under C. acanthura perhaps 

 belong to two or more distinct species ; and the fact is, that the dif- 

 ference between an adult male of the true C. acanthura and one of 

 C. completa is great, too great perhaps to justify the course I 

 follow. However, as I fail to find any constant peculiarities enabling 

 me to draw satisfactory diagnoses, I have provisionally united the 

 various forms, leaving to future workers to decide whether I am 

 right or wrong. 



A. Specimens representing L. acantlmra of Shaw, C. pectinata and 

 cycluroides of Wiegmann, and C.pectiyiata and teres of Bocourt. 

 Dorsal and subtibial scales very small, the former smooth or 

 very obtusely keeled ; caudal spines moderate ; two or three 

 series of smaller, smooth or feebly keeled scales between the 

 sixth and seventh verticils of spines. 



a. Hgr. 



b, c, d. Ad., stuffed. 

 e-f. d- 



ff,h. 2> stuffed. 

 i-k. J . 



I, m, n. Ad., skins. 

 0. Yg. 



p-r, s-u. d, 2, ligr., & yg- 

 V. Yg. 

 ic-ar. Hgr. & yg. 



