196 IGUANIDE. 
Cyclura articulata, Wiegm. 1. c. p, 43. 
—— denticulata, Wiegm. 1. ¢. pl. iii. 
Ctenosaura pectinata, Cope, Proc. Ac. Philad. 1866, p.124; Bocourt, 
le. p. 140. 
teres, Bocourt, l. e. p. 142. 
. — completa, Bocourt, l. 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 may be 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-/) entirely 
blackish. 
millim. millim 
Total length ....., 680 Fore limb........ 105 
Heads sisi dsgorwe ans y sis 60 Hind limb........ 170 
Width of head .... 44 Hail: orcs bleed otek i 410 
Body ............ 210 
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. acanthura of Shaw, C. pectinata and 
cycluroides of Wiegmann, and C. pectinata 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. Her. California. Type). 
b, ¢, : Ad., stuffed. Mexico. (Type) 
ef. 3. Mexico. Mr. Geale [C.}. 
,A. 9, stuffed. Putla, Mexico. 
whe oo. Mazatlan. Hr. Forrer [C.]. 
1, m,n. Ad., skins. Presidio. Hy. Forrer [C.}. 
o. Yg. Presidio. Hr. Forrer [C.), 
p-r,s-u. 3, 9, hgr,&yg. Tres Marias Islands, Hr. Forrer [C.]. 
v. Ye. Ciudad. Hr. Forrer [C.). 
w-«, Hgr. & yg. Ventanas, Hr, Forrer [C.}. 
