VOL. XXXVIII, No. 446 



FEBRUARY, 1904 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



I. Eeclassification of the Eeptiiia • ■ iri».uxx.»«v,« H. F. 08B0BN 93 



n. The Early Development of Desmognathus f asca PEOFESSOB H- H. WILDEB 117 

 m. The Histology of the Light Organs of Photinus margineUus 



ANKE B. TOWHSEiro 127 



Oral Breathing Valves c 

 Shape of the Mouth 



, their Modifications and Belation t 



BOSTON, U. S. A. 



GINN & COMPANY, Publishers 



