1896.] Zoology. 327 



(27.) Phrynosoma modestum. Common. There also occurs a bluish 



The Death Valley Expedition, much further west, obtained 56 

 reptiles and batrachians, of which only five (those marked with an 

 asterisk) are common to our list. It is especially noteworthy that there 



— T. D. A. Cockerell, N. M. Agr. Exp. Sta. 



Professor Cope's criticisms of my drawings of the squam- 

 osal region of Conolophus subcristatus Gray ; (Amer. Nat- 

 ural., Febr., 1896, p. 148-149) and a few remarks about his 

 drawings of the same object from Steindachner. — In the Feb- 

 ruary ^Number of this Journal Prof. Cope makes the following remarks : 

 " Dr. Baur again denies that the exoccipital [paroccipital] articulates 

 with the quadrate in certain genera of the Iguanidse and gives some 

 figures of that region in the Conolophus subcristatus, to sustain his 

 allegation. Unfortunately, though he seems to have taken the elements 

 apart, as I suggested that he do, he did not put them together in 

 their original relation when he had them drawn. I now give two 

 drawings traced from the skull of the same species given, by Dr. Stein- 

 dachner. As these plates represent exactly the characters, which I 

 have observed and described in allied genera, I regard them as correct. 

 It will be observed that there is a considerable contact between the ex- 

 occipital and the quadrate. There is also contact with the supratem- 

 poral [prosqamosal] and probably with the paroccipital [squamosal]. 

 The articulation of the quadrate with the exoccip ' 

 Iguanidce" 



To this I have to reply the following: 1. The single elements of 

 the skull of Conolophus were not taken apart at all. The quadrate, 

 prosquamosal, and squamosal of the right side were separated from the 

 rest of the skull, in such a way, that they remained together in natural 

 position. The corresponding left side of the skull remained intact. 

 All this was done two years ago, without the advice of Prof. Cope. My 

 figures were drawn with the camera-lucida and are absolutely correct 

 in every respect. I have two other skulls of Conolophus ; several of 

 Amblyrhynchus, Iguana and Cyclura. In all I find the same condi- 

 tion. I have not to change a single word in my original description 

 nor a line in my drawings. The quadrate is not supported by the par 

 I fope] in the Lizards, as Cope stated, but by the 

 squamosal [paroccipital Cope], the prosquamosal [supratemporal Cope] 

 taking also part, if present. The paroccipital does not even touch the 

 quadrate. 



