366 Dr. H. C. McCook on a 



position, so that the pattern of coloration shows on the whole 

 an irregular band of arrangement. Head above black, nearly 

 all the shields with a light margin in front, a portion of the 

 suture between the occipitals white or whitish. Lower parts 

 white, either uniform or with scattered subquadrangular 

 black spots. A very young specimen 1\ inches long has the 

 upper parts of a nearly uniform slate-colour. 



The largest of the specimens measures 22 inches, of which 

 the tail takes 6|. 



Dromicus leucomelas (D. & B.). 



Alsophis sibonius, Cope, I. c. p. 275 ; Garman, I. c. p. 283. 



Four specimens from Laudat. 



This species occurs also in Guadeloupe and San Domingo, 

 and, according to Dumeril and Bibron, in Marie-Galante. 



Boa diviniloqua (Laur.). 



An adult and young specimen from Laion. 



At present I am not prepared to give an opinion as to 

 whether this snake should be specifically separated from Boa 

 constrictor. 



Cystignathus pentadactylus (Laur.). 



Six adult specimens from Laudat. 



This frog is widely distributed in Brazil and the Guianas. 

 There is a distinct indication of the digital fringe, which 

 induced me to refer the first specimen I saw from Dominica 

 (Cat. Batr. Sal. p. 27) to G. ocellatus. 



Hylodes martinicensis (Tsch.). 



A great number of specimens of many colour-varieties 

 from Laudat and Laion. 



Occurs also in San Domingo, St. Vincent, and Barbadoes. 



XLIX. — A new Fossil Spider (Eoatypus Woodwardii). 

 By Henry C. McCook, D.D.* 



While visiting the British Museum of Natural History at 

 South Kensington, London, in the summer of 1887 I was 



* From tlie * Proceedings of the Academy of Natural Sciences of 

 Philadelphia,' 1888, pp. 200-202. 



