258 SPHAERODACTIXUS. 



Greatest width of head 4 mm. 



Fore Umb 6 . 5 mm. 



Hind Umb 8 mm. 



Remarks: — A small and very widely varying species. It is found both 

 within and without human abodes, about equally common in both situations. 

 Represented in M, C. Z. by large series from all parts of its range. 



25. Sphaerodactylxjs anthracinus Cope. 

 Plate 7, fig. 3; Plate 21, fig. 1-4. 



SphaeTodactyJus anthracinus Cope, Proc. Acad. nat. sci. Phil., 1861, p. 500. 

 Sphaerodactylus asper Garman, Bull. Essex inst., 1888, 20, p. 113.' 



Type-locality: — The original description stated that the type came from 

 Mexico. This has been copied by Boulenger and others. It seemed at once 

 highly improbable that a sphaerodactyl of this style should occur upon the main- 

 land. The type-specimen was, therefore, carefully examined and found to be 

 absolutely identical with examples from Andros Island in the Bahamas. It has 

 not been rediscovered in Mexico and the locaUty is certainly erroneous. 



Type: — Academy Natural Sciences Philadelphia. 7,558. 



Distribution: — Only definitely known from Middle Bight, Andros Island, 

 Bahamas. 



Diagnosis: — Very large, having large, imbricate keeled dorsals beginning 

 far forward on the neck, even enlarged on the postaural regions; about six of 

 largest equal to distance from tip of snout to middle of eye. A middorsal zone 

 of fine granules, five supralabials to below centre of eye, median head-scales not 

 enlarged, much smaller than scales of snout. Head very narrow and flat. 



Description:— M. C. Z. 6,222. 



The larger Cotype of asper Garman. Snout long and narrow and depressed ; 

 eye distinctly nearer ear than tip of snout ; rostral large with a median groove ; 

 nostril between rostral, first supralabial, a large squarish supranasal and two 

 small scales; the supranasals of each side separated by two small scales, or often 

 one large one; fifth supralabial, a small one, below centre of the eye; superciliary 

 spine well developed; head above and on sides covered with tiny granular scales, 

 distinctly enlarged on the snout; scales of neck much enlarged passing directly 

 into the very large, heavily keeled, tectiform dorsals of which six of the largest 



'Types: — M. C. Z. 6,222 Bahamas; Andros Island. C. J. Maynard. 2 Cotypes. 



