WILLARD: CRANIAL NERVES OF ANOLIS CAROLINENSIS. 19 
cility at my disposal and for his continued interest and encourage- 
ent. Also the work has been aided not a little through the courtesy 
f Professor H. W. Norris of Grinnell College and Dr. C. J. Herrick 
f Chicago University, who on different occasions have given me work- 
g facilities in their laboratories. 
B. SCOPE OF THE PAPER. 
This paper includes, to some extent, the general anatomy of the 
ead of Anolis; much of this, however, is of quite secondary impor- 
nce and there has been no attempt to treat critically anything but 
je nervous organs; even within this field certain features have been 
mitted, since they can better be considered in connection with the 
ntral nervous system. ‘This is true of the larger sense organs and 
leir nerves, 7. ¢., eye, ear, and olfactory organs. Also the distribu- 
on of the vagus nerve is not carried into the trunk region beyond 
ie limits of the series of sections figured. Of the non-nervous - 
ructures, the skeleton is included for the purpose of more exact 
pography. The muscles and glands, and the integument and 
ucous membrane with their sense organs are included on account of 
jeir relation to the peripheral distribution of neurones. 
The aim of this work is to give as complete an account as possible 
a single reptilian form, which may serve as a basis for further com- 
ative study. The entire absence of such an account within the 
yole sauropsidan group is believed to be sufficient justification for 
» publication of the present paper. But this plan is not compatible 
wh the intensive treatment of many of the problems that arise in 
nection with various details of the work. Much of the literature 
t has been consulted in the course of the study has not been specifi- 
y cited as it would have been, had the field been more limited. 
\\s is particularly true of most of the reptilian studies whose results 
ubased on dissections alone and are therefore open to more than one 
Mrpretation, because an attempt at detailed comparisons in such 
4's would serve only to impair the usefulness of the present study. 
I egard to the Icthyopsida, where more exact work has been done, 
it ems premature to go far with comparisons until the study of the 
opsida has covered several forms. Such comparisons as are made 
a therefore, be considered tentative. 
