22L bulletin: museum of comparative zoology. 



For the best Weigert preparations, Herriek's method of fixation 

 for fishes with Flemming's fluid was found the best for the lizard also, 

 although I was unsuccessful in my attempts to get the best results in 

 l)Oth the central and peripheral fibers by a single treatment. That 

 is to say, when the sections were decolorized properly for the central 

 nervous fibers, the peripheral nerves were decolorized too far. On the 

 whole I found it much more satisfactory to base the study of the 

 peripheral nerves on the Vom Rath series, and the present paper 

 chiefly rests on the findings in such material. 



D. SYSTEMATIC POSITION OF AXOLIS. 



Following Cope (:00, p. 158, ff.), we have the following division of 

 the living Reptilia: — 



Class Monocondylia. 

 Subclass Reptilia 



Orders Testudinata 

 Loricata 



Rh}Tichocephalia 

 Squamata 

 Suborders Ophidia 

 Sauria 

 The group characters of the Sauria are as follows: "Quadrate bone 

 articulating with the exoccipital ; parietal bones not closing the brain 

 case in front; generally an epipterygoid and sternum; teeth with 

 dentinal roots; phalanges with condyles" (p. 178). The family 

 Iguanidae is represented in North America by twelve genera; it is 

 subdivided as follows : — 



Subfamilies Anolinae 



Basiliscinae 

 Iguaninae 

 The genus Anolis falls under the first of these three subfamilies, 

 which includes six know^n genera, Anolis being the only one foimd in 

 the United States. Cope (p. 233) describes Atiolis carolinensis and 

 states that it " is distributed from the Rio Grande to Florida, inclusive, 

 and as far north as Kinston, North Carolina. It is, moreover, com- 

 mon in the Bahama Islands and Cuba, where it reaches a size rather 

 superior to what is usual in the United States." Among other Iguan- 

 idae found in the United States are the well-known forms Sceloporus 



