1915.] NATURAL SCIENCES OF PHILADELPHIA. 31 



The body scale counts as given by Cope are: 

 N. c. compressicauda 2^1^ 



N. c. tceniata ■'^^~qo 



N. c. walkeri '^^ToV 



N. c. ohscura 21 (?) 



N. c. compsolcema 19— „- 



67 



The head shield characters of N. c. tceniata and A'', c. walkeri are 

 not treated very fully by Cope or Yarrow, while for N. c. ohscura no 

 scutation is given at all. Because the data given by Cope are 

 incomplete, only the following can be expressed: 



Pre- and 

 Labials. postoculars. Temporals. 



N. c. compressicauda 8+10 1+3 1+3 



.V. c. taniata 8+10 1+3 1+3 



N. c. walkeri 8+10 1+3 1+3 



.V. c. ohscura Not given. 



N. c. compsolcema 8+ 9 1+3 ? 



Again, the length of the tail in percentage to total length taken 

 from Cope would be: 



N. c. compressicauda 28.8% 



N. c. tceniata 25.9% 



N. c. walkeri ? 



N. c. ohscura ? 



N. c. compsolcema 21.5% 



Lastly, a glance shows that the type locality of these "races" are 

 all in the same faunal area. Two of the races came originally from 

 Tampa Bay and two from Key West, while the remaining one was 

 from the opposite side of Florida, taken at Volusia. 



The Adult Specimens. 



Trying to classify the fifteen adults under the five described races, 

 we find that none conform in every detail to any one race, but that 

 each one presents some of the characters from more than one ''sub- 

 species." Eight of these adults are from Tampa Bay, the other 

 seven from Key West. 



The coloration of the adults shows a gradual change dorsally from 

 the dark brown to the light straw-colored phases and from the wide 



