6 University of Michigan 



from Trinidad and much smaller, scarcely larger than the ver- 

 tebral scales, at any rate much smaller than those of the fore- 

 head, in those from Martinique. 



The Bonaire specimens agree with those from Martinique 

 and differ from Trinidad specimens in having small scales 

 about the occipital scale, and they differ from the Martinique 

 form in having smooth supraoculars and from both in having 

 the supraorbital semicircles more widely separated. As stated 

 above, in a series of nineteen specimens the semicircles are 

 entirely separated in six, in contact by one pair in ten and by 

 two pairs in three. In Martinique specimens and in some of 

 those from Trinidad the enlarged supraoculars have a short 

 keel, sometimes reduced to a low tubercle ; and again in the 

 Martinique and Trinidad specimens examined the semicircles 

 are broadly in contact by three or four scales, the forward 

 point of contact being about on a level with, or a little posterior 

 to, a line connecting the anterior margin of the first enlarged 

 supraoculars. 



It is very prol)able that there are also differences in the col- 

 oration of the three forms, but this cannot be satisfactorily 

 determined with preserved material. 



It may be remarked here that the name^ of the Martinique 

 form is apparently Anolis roquet (Bonnaterre), Enc. Meth. 

 Erpet., 1789, p. 54, pi. 9, fig. 5. This name is based on Le 

 Roquet Lacepede and antedates Merrem's Anolis ccpcdii. That 

 the Trinidad form is to be known as Aiiolis acncns Gray (Cat. 

 Liz., 1845, P- 205), and that this name is not available for the 

 Bonaire form, seems to be established by the fact that the 



1 1 am indebted to Dr. Leonhard Stcjncgcr for assistance with the 

 nomenclature of these forms, and to Miss Mina Winslow for the 

 examination of the type of Anolis acnrits Gray. 



