1885.] 269 lCope 



Measurements. M. 



Length of posterior leg 162 



" " posterior foot 085 



" " tibia 045 



Two specimens of this species are in the National Museum, which were 

 sent from Colima, in Western Mexico, by John Xantus. 

 Ctenosaura teres Harlan, Bocourt, Miss. Sci. Mexique, Reptiles, p. 142 

 Cyclura teres Harlan, Journ. Acad. Philada., iv, 1825, p. 24G, tab. 16 

 Wiegmann, Herpert. Mex., 1834, p. 42. " Ctenosaura armata Gray 

 Synopsis Griff. Anim. Kingdom, ix, 1831," Bocourt. Cyclura pectin- 

 ata Weigmann, Herpetol. Mexican a, 1834, p. 42, tab. 2. Dum. Bibron, 

 Erp. Gen., iv, 1837, p. 221. Cyclura acanthura Sumichrast, Univ. et 

 Eevue Suisse ; Archiv. des Sciences Phys. et Nat., 1864, p. 49. Cteno- 

 saura, pecimata Wiegm., Gray Catal. Lizards, Brit. Mus., 1845, p. 49. 

 Boeourt, Miss. Scientifique Mexique, Reptiles, p. 140. 

 Tehuantepec, Sumichrast ; Colima, Xantus; Tampico, Dallas; Vega 



de Alatorre, Vera Cruz, Comision Geograjica. 

 Subspecies brachylopha Cope. 



Pour stuffed specimens from Mazatlan differ from others of equal size 

 and age from other localities in the extreme shortness of the processes 

 which compose the dorsal crest. They are in fact merely elongated com- 

 pressed scales, longer than high, except on the interscapular region, where 

 they are as high as long. The same character is seen in young specimens 

 of the ordinary variety. There are three scales on the canthus rostralis, 

 of which the posterior is longer than deep, the second deeper than long, 

 and the third, adjacent to the nares, is deeper than long, and divided into 

 a superior and an inferior plate. The color is apparently green in life, 

 punctulated with blackish brown. The punctulations arrange themselves 

 into a row of median dorsal spots, and in three of the specimens into two 

 transverse bands near the middle of the sides of the abdomen. Tail with 

 broad blackish rings. The measurements of the largest specimen are : 

 Total length, 630 mm ; to vent, 263 mm ; to posterior border of mem- 

 branum tympani, 59 mm ; width of head at front of mem. tympani 40 

 mm ; length of posterior leg and foot, 124mm ; of posterior foot 52 mm. 



Mazatlan Bischoff ; Nos. Natl. Museum, 7180-81-82-83. 

 Ctenosaura completa Bocourt, Miss. Scientif. Mexique, Reptiles, p. 

 145. Ctenosaura pectinata Cope, Proceedings Academy Philada., 

 1866, p. 124 ; Proceedings Amer. Philos. Soc, 1855, p. 388. 

 Aspinwall, Panama, Gill; Guatemala, San Salvador, Miss. Scientif.; 

 Yucatan, Schott ; Cozumel Id., Ridgicay. 

 Ctenosaura quinquecarinata Gray. Cope, Proceedings Amer. Philo- 

 sophical Society, 1869, 161. Cyclura quinquecarinata Gray, Zoologi- 

 cal Miscellany, p. 59. Enyaliosaurus quinquecarinatus Gray, Csutal. 

 Lizards, Brit. Mus., 1845, p. 192. 

 Tehuantepec, Sumichrad. 



