218 Proceedings of the Biological Society of Washington. 



been compared (they are M. C. Z. 3598). It differs conspicuously, how- 

 ever, in having much smaller and less heavily keeled dorsal scales. The 

 pattern of the coloration is similar to that of melanochlorus but the 

 quality is wholly different. The new species is light sandy gray with 

 more or less irregular black cross bars and spots. In the Haitian species 

 the ground color is deep olive so that the dark marks are much less 

 conspicuous. In arenarius the belly is ashy white, the throat only with 

 a few faint marblings; in rnelanochlorus the belly is dark drab, the throat 

 with black markings, the thighs white spotted. 



A fine series of paratypes show that, as is, I think always, the case in 

 this genus, the color characters are perfectly diagnostic even were not this 

 conspicuous difference in squamation so striking. 



Cyclura carinata Harlan. 



The type of this species was distinctly stated to have come from Turks 

 Island, so also the specimen collected by Bickmore and now in the 

 Museum of Comparative Zoology (Cf. Barbour and Noble, Bull. M. C. Z., 

 60, 1916, p. 157, PL 8, fig. 3-4, pi. 13, fig. 3-4). It has long been sup- 

 posed that the Iguana probably was exterminated upon Turks Island 

 and I had feared that the species might be in danger of extinction. It 

 was a pleasant surprise to receive specimens and news of this species from 

 two sources. Both the Commissioner of the Turks and Caicos Islands, 

 The Honorable G. Whitfield Smith and Mr. Louis A. Mowbray, exploring 

 for the New York Aquarium, have found that C. carinata was abundant 

 upon Ambergris Cay, one of the Caicos group, and report its probable 

 presence upon other islands. The Museum has two excellent specimens 

 from each of these sources. 



Epicrates chrysogaster (Cope). 



When Cope described this species (Proc. Amer. Phil. Soc, 11, 1871, p. 

 557) he evidently had but a single example. No subsequent record of 

 the capture of the boa upon Turk's Island has since appeared in the 

 literature so far as I am aware. Mr, L. A. Mowbray caught four boas 

 upon Ambergris Cay which are surely very closely related to E. chryso- 

 gaster, if not identical with it, which is probably the case. We do not 

 know anything about variation within this species so that for the present 

 I shall simply remark that in this series the scale rows vary from 39-43, 

 the number of ventrals from 251-264, of subcaudals from 72-82 and of 

 dorsal spots on body (only) 57-59. One specimen is longitudinally 

 striped, not spotted. The type had 43 rows, 255 ventrals, 78 subcaudals 

 and 54 dorsal spots. The number of dorsal spots serve to separate this 

 species from E. fordii, which has from 69-78 ; while if the figure which 

 Stejneger copies from Zenneck is accurate (Stej., Ann. Rep. U. S. Nat. 

 Mus., 1902 (1904), p. 692, fig. 153-157) these snakes may be distinguished 

 from E. monensis by the smaller and more numerous head scales. The 

 figures also show lateral series of spots which are not present in the suite 

 from Ambergris Cay. 



