CONTROL OF HEAD FORMATION IN PLANARIA 



47 



r„TLD C M 1913 b studies, etc. VI. The nature of axial gradients in 

 ' Planaria and their relation to anteroposterior dommance, polarity, 

 and symmetry. Arch. f. Ent. mech., Bd. 37. 



ImTZdL, etc. VII. The stimulation of pieces by section m 

 Planaria dorotocephala. Jour. Exper. Zool., vo . 16, no.3. 



1914 b Studies, etc. VIII. Dynamic factors m head determmation 

 in Planaria. Jour. Exper. Zool., vol. 17, no. 1 . 



1915 a Senescense and rejuvenescence. Chicago. 



1915 b Individuality in organisms. Chicago. ^ ^ , , 



9 6 Studies, etc. IX. The control of head form and head frequency 

 by means of potassium cyanide. Jour. Exper. Zool., vol 21 no. 1. 

 191^ The effect of cyanides on carbon dioxide production and on 

 susceptibility to lack of oxygen in Planaria dorotocephala. Amer. 

 Tniir PhvsioL, vol.48, no.3. . . -m 



m9 b Susce;tibilit>: to lack of oxygen during starvation m Planaria. 

 \mer Jour. Physiol., vol. 49, no.3. . , ^ , i„ 



f920 a Studies! etc. X. Head frequency in Planaria doroto-pha a 

 in relation to age, nutrition, and motor activity. Jour. Exper. Zool., 



mof Some considerations regarding the nature and origin of physi- 

 nloeical gradients. Biol. Bull., vol. 39, no. 3. 



^20 Sorigin and development of the nervous system. Chicago. 



Child C M., and McKik, M. 1911 The central nervous ^^f «- -. ^^If^^^ 



' phihalmic and teratomorphic forms of Planaria dorotocephala. Biol. 



Cttshny mo" Pharmacology and therapeutics, or the action of drugs. London, 



p. 145. 

 r7/(PFK F 1913 Biochemie der Pflanzen. Jena, p. 159. 



Hyman L H 1919 a On the action of certain substances on oxygen consump- 

 ' t^n. II Action of potassium cyanide on Planaria. Amer. Jour. 

 Phvsinl vol.48, no. 3. ,. 



1919 b Physiological studies on Planaria. II. Oxygen consumption 

 in relation to regeneration. Amer. Jour. Physiol., vol. oO 

 1921a Metabolic gradients of vertebrate embryos. I. Teleost 

 embrvos. Biol. Bull., vol. 40, no. 1. 



1^21 b Physiological Studies, etc. V. In press._ Jour. Exper. Zool. 

 TnFR 7 1916 The organism as a whole. New^ ork, p. 15o. 

 MOHGAN, T H. 1898 Experimental studies of the regeneration of Planarua 

 maculata. Arch. f. Ent. mech., Bd. 7. . -.i, 



ToS Polarity considered as a problem of gradation of materials. 

 Jour Exper. Zool., vol. 2. . . 



Ravdolph, H.' 1895 Observations and experiments on regeneration in plana- 

 rians. Arch. f. Ent. mech., Bd. 5, no. 2. 



