188J.] i-aL [Cope. 



largest specimens. The legs are light brown with pale spots, marks which 

 are most distinct in adults. When the limbs are appressed to the side, the 

 elbow marks the middle of the longest posterior toes. 



The characters of this species may be well understood by comparing it 

 with other species of the genus as follows : 



I. Tubercles larger and more numerous, keeled. 



Abdominal scales in 30 transverse and 17 longitudinal rows ; two post- 

 mentals and four scales behind them P. mntralis O'Sh. 



Longitudinal series uninterrupted ; abdominal scales in 30 transverse, and 

 21 longitudinal rows ; 3 postmentals and six scales in the row behind 

 them P- julieni Cope . 



Longitudinal series interrupted by scales ; abdominal scales in 40 trans- 

 verse and 25 longitudinal rows P. tubercidosus Wieg. 



II. Tubercles fewer, smaller and not keeled. 



Tubercles in rows ; abdominal scales in 56 rows ; three postmental scuta ; 



discs larger P. galapagoensis Pet. 



Tubercles in rows ; abdominal scuta in 56 rows ; four postmentals ; discs 



very small P. microphyllus Cope. 



Tubercles not in rows, more obscure ; abdominal scuta in 50 rows ; two or 



three postmentals ; discs larger ; cross-banded P. inrnqualis Cope. 



The abnominal scales are in more numerous longitudinal rows than 

 described in the allied P. ventralis O'Shaughnessy* of Jamaica, and the 

 postmental plates and scutes have quite a different arrangement. The 

 six scales of the first row form a series very convex backwards. Several 

 specimens. 



Thecadactylus rapicauda Houtt. 

 Tretioscincus bifasciatus Dum. 



CsEMIDOPHORtrS MURINUS D. & B. 



Amiva bifrontata Cope. This species is now well known to be a New 

 Grenadian species, and not to be found in the Virgin islands as was 

 originally suspected. 



Iguana tubercdlata Laur. 



Anolis lineatus Daudin. Two specimens which only differ from the 

 description of Dumeril and Bibron in having the muzzle a little longer 

 or the nostril a little posterior. The latter is separated from the rostral 

 plate by two scales, instead of one, as described by Dumeril and Bib- 

 ron. These authors give Martinique as the habitat as indicated by a 

 label. 



V. Curacao; U. S. Fish Commission. 



A jar of reptiles from the above island, obtained by the naturalists of 

 the U. S. Fish Commission, was submitted to me by Professor S. F. Baird, 

 director. Curacao, as is known, is one of the same group as Aruba, and 



♦Annals and Mag. Nat. His., Oct., 1875. 



