504 



and to indicate a new species for which I would propose the name 

 Crocodilus Floridanus, or Florida Crocodile. 



Alligator M>* r: 1 j. 215) compared with the skull of a 



crocodile (Fig. 214). Both are from the same locality, Biscay ne. 

 Florida. The length of the alligator to which this skull belonged 

 was nine feet ten inches, and that of the crocodile was ten feet 

 eight inches, the figure being taken from the skull of the female 

 here described. 



I append the following measurements, in inches, of the three 

 largest crocodile skulls. The first is that of the male 14 feet in 

 length ; the second that of the female 10 feet 8 inches in length : 

 and the third, that of the Lake Worth specimen, 9 feet 10 inches 

 in length. 



REVIEWS AND BOOK NOTICES. 



Geographical Variation en Color among Squirrels. — We 

 have previously, in papers by Messrs. R. Ridgway and J. A. Allen, 

 presented our readers with the latest views on the subject of the 

 geographical variation in size, proportion- :m ,j color among North 

 American birds, and now reproduce in part a recent paper by Sir. 

 J. A. Allen on the same subject, particularly variations in color 

 as applied to the squirrels of America north of Mexico, published 

 in the " Proceedings of the Boston Society of Natural History ' 

 (vol. xvi, Feb. 4, 1874). This is a subject to which local col- 

 lectors can very largely contribute by the transmission of marked 



ied to the best advantage, as large numbers of the commonest 



