172 TJniverslifj of California Puhlieations i)i Zoologij [Vol. K3 



Note. — On the day in which the proof of the present article came from the 

 printer, a paper was received from Dr. Davenport Hooker (1914) on amoeboid 

 movement in the melanophores of the frog. The melanophores were studied 

 partly by means of sections of preserved material and partly by observation of 

 the living but not isolated cells. Hooker's results arrived at by different 

 methods are quite in accord with my own, and lead him to the conclusion that 

 "The melanophores of both larval and adult frogs expand and contract within 

 the spaces which enclose them. As the jjrocesses of expansion and contraction 

 are performed by means of pseudopodia, these cells are ameboid." 



Transmitted March 31, 1914. 



LITERATURE CITED 



Gaupp, E. 



1904. A. Ecker's und'E. Wiederscheim's Anatomie des Frosches auf Grund 

 eigner Untersuchungen durchaus neu bearbeitet. Dritte Abth. 

 Lehre von den Eingeweiden, dem Integument und den Sinnesor- 

 ga'nen, ed. 2 (Braunschweig, Vieweg), xi + 961 pp., 240 figs, in 

 text. 



Hakrison, E. G. 



1910. The outgrowth of the nerve fiber as a mode of protoplasmic move- 

 ment. Jour. Exp. Zool., 9, 848-878, pis. 1-3. 



Holmes, S. J. 



1913. Observations on isolated living pigment cells from the larvae of 



amphibians. Univ. Calif. Publ. Zool., 11, 143-172, pis. 5-8. 



Hooker, D. 



1914. Amoeboid Movement in the Corial Melanophores of Eana. Am. Jour. 



Anat., 16, 237-250, 3 figs, in text. 



