24 bulletin: museum of comparative zoology. 



in the part of Bronn's Thier-Reich devoted to the Reptilia, based his 

 description of the cranial nerves of lizards largely upon the work 

 Fischer published forty years previously. More recently Osawa ('98) 

 has given a quite full account of the anatomy of Hatteria, in which 

 the cranial nerves are described. This work fails of much of its use- 

 fulness because of lack of plates ; the text figures are too obscure to 

 be of much use. Watkinson ( :06) describes J^aranus bii'ittatus, includ- 

 ing the skull and musculature among her drawings. In matters of 

 close comparison, however, her work has proved to be inadequately 

 illustrated properly to supplement her description. In the same 

 manner Cords ( :04) attempts to meet a long felt need in the anat- 

 omy of the nervous system of birds; but here, again, the lack of a 

 diagram of the complete system, for the purpose of comparison, is felt. 



In addition to the works mentioned, the cranial nervous system of 

 reptiles and birds has been touched upon by various authors in the 

 comparati\'e treatment of certain nerves or groups of nerves. 



In the following work on Anolis there is presented for the first time 

 a description of the cranial nerves of an adult amniote form based 

 upon a complete series of sections. 



F. SKELETAL STRUCTURES. 



1. Skull. 



The skeletal parts involved in this account are those which are 

 related topographically to the cranial nerve roots or serve for the 

 attachment of muscles whose description follows, or have some other 

 important, though indirect, relation to the main subject. INIany 

 points of secondary importance in regard to length of rami, points of 

 branching, and course of peripheral nerves are explained when refer- 

 ence is made to the skull and its foramina. The skeletal parts appear- 

 ing in the transverse sections are not readily understood without 

 reference to the entire structure, therefore the three drawings of the 

 skull are made with accuracy with a view to their permanent value 

 in any problem involving the comparative anatomy of the reptilian 

 head. Cope (:00) is followed in naming the parts of the skull and 

 hyoid apparatus. As he separates the Reptilia altogether on osteo- 

 logical characters, the basis for a large part of his definition of the 

 Sauria may be recognized in this skull, c. g., "Quadrate bone articu- 

 lating with exoccipital; parietal bones not closing the brain case in 



