224 CAREY P. McCORD AND FLOYD P. ALLEN 



LITERATURE CITED 



(1) Ballowitz, E. 1914 Pflliger's Archiv, Bd. 157, 165. 



(2) Hargitt, C. W. 1912 Jour. Animal Behav., vol. 2, 51. 



(3) Hooker, Davenport 1914 Science, N. S., vol. 39, 473. 



(4) Hooker, D. 1912 Zeit. F. allg. Physiol., Bd. 14, 93. 



(5) Ballowitz, E. 1893 Zeit. wiss. ZooL, Bd. 56, 673. 



(6) Laurens, Henry 1915 Jour. Exp. Zool., vol. 18, 577. 

 Spaeth, R. A. 1916 Jour. Exp. Zool., vol. 20, 193. 

 Hooker, D. 1914 Am. Jour. Anat., vol. 16, 237. 



(9) Babak, E. 1910 Pfliiger's Archiv, Bd. 131, 87. 



10) Ftjchs, R. F. 1915 Winterstein's Handb. d. vergl. Physiol., Bd. 3, Teil.f2. 



1189. 

 LI) Laurens, H. 1916 Jour. Exp. Zool., vol. 20, 237. 



12) Gudernatsch 1914 Am. Jour. Anat., vol. 15, 431. 



13) Dale and Laidlaw 1912 Jour. Pharm. and Exp. Ther., vol. 4, 75. 

 (14) PiERSOL, Human Anatomy, 4th ed., vol. 2, 1124. 



