212 J. S. NICHOLAS 



Brachet, J. La localisation des proteines sulfhydrilees pendant le developpe- 

 ment des Amphibiens. Bull. Acad. Roy. Bclg., 1938:499-510, 1938. 



Brachet, J. Emhryologie Chimique. Paris, Masson et Cie., 505 pp., 1944. 



Butler, E. G., and O. E. Schotte. Histological alterations in denervated non- 

 regenerating limbs of urodele larvae. /. Exp. ZooL, 88, 307-341, 1944. 



Caspersson, T., H. Landstrom-Hyden, and L. Aquilonius. Cytoplasma 

 nucleotide in eiweissproduzierenden Driisenzellen. Chromosoma, 2, 

 111-131, 1941. 



Child, C. M. Organizers in development and the organizer concept. Physiol. 

 ZooL, ip, 89-148, 1946. 



Conklin, E. G. The development of centrifuged eggs of ascidians. /. Exp. 

 ZooL, 60, 1-119, 1931. 



Dalcq, A. M. Form and Causality in Early Development. Cambridge Uni- 

 versity Press, 1938. 



Daniel, J. F., and E. A. Yarwood. The early embryology of Triturus toro- 

 sus. Univ. of Calif. Piihl. ZooL, 43, 321-356, 1939. 



Diver, C, A. E. Boycott, and S. Garstang. Inheritance of Inverse Sym- 

 metry. /. Genetics, 75, 113-200, 1925. 



Eakin, R. M. Regional determination in the development of the trout. Arcli. 

 f. Entw-mech., /jp, 274-281, 1939. 



Fankhauser, G. Cytological studies on egg fragments of the salamander 

 Triton. IV. The cleavage of tgg fragments without the egg nucleus. 

 /. Exp. ZooL, 67, 349-394, 1934- 



Gillette, R. Cell number and cell size in the ectoderm during neurulation 

 (Amblystoma maculatum). /. Exp. ZooL, pd, 201-222, 1944. 



Hadorn, E. Ubertragung von Artmerkmalen durch das entkernte Eiplasma 

 beim merogonischen Triton-Bastard palmatus-Plasma X cristatus- 

 Kern. Verh. Dtsch. ZooL Ges., 1936, 97-104, 1936. 



Hall, E. K. Regional differences in the action of the organization center. 

 Arch. f. Entw-mech., 135, 671-688, 1936. 



Harrison, R. G. The effect of reversing the mediolateral or transverse axis 

 of the forelimb bud in the Salamander embryo (Amblystoma punc- 

 tatum Linn.) Arch. f. Entw-mech., 106, 469-502, 1925. 



Harrison, R. G. Cellular differentiation and internal environment. A.A.A.S., 

 piibl. no. 14, 77-97, 1940. 



Harrison, R. G. Relations of symmetry in the developing embryo. Trans. 

 Conn. Acad. Arts and Sciences, 36, 277-330, 1945- 



Harvey, E. B. Parthenogenetic merogony or cleavage without nuclei in 

 Arbacia punctulata. Biol. Bull., 77, 101-121, 1936. 



Harvey, E. B. Structure and development of the clear quarter of the Ar- 

 bacia punctulata egg. J. Exp. ZooL, 102, 253-275, 1946. 



Heatley, N. G. The distribution of glycogen in the regions of the Amphib- 

 ian gastrula ; with a method for the microdetermination of glycogen. 

 Bioch. Jour., 2g, 2568-2572, 1935. 



Heatley, N. G., and P. E. Lindahl. Studies on the nature of the amphibian 

 organization centre. V. The distribution and nature of glycogen in the 

 amphibian embryo, Proc. Roy. Soc. London, (B) 122, 395-402, 1937. 



