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PETERS, Th. DrMed. — Heiligenberg-Inst., (17b) HEILIGENBERG.<br />
Kreis Ueberlingen/Bodensee. Deutschhnd<br />
a. Einfluss der Rontgenstrahlen auf die Entwicklung. (Urodela)<br />
PETRY, G. a.o.Prof. — Anat. Inst, der Univ., Robert Kochstr. 6, MAR-<br />
BURG/Lahn, Deutschland<br />
a. Funktionelle Histologie der Eihaute. (Mammalia)<br />
PFLUGFELDER, O. Dr rer.nat., Prof. — Zool. Inst, der Landwirtschaftl.<br />
Hochschule, STUTTGART-HOHENHEIM, Deutschland<br />
a. Anderung des Stoffwechsels nach Storung des horraonalen Gleichgewichts.<br />
(Insecta)<br />
b. Entwicklungsphysiologie von Schwanzmissbildungen. (Aves)<br />
c. Einfluss der Pinealektomie auf die Postembryonalentwicklung. Lebistes<br />
reticulatus (Teleostei)<br />
d. Entwicklung. (Acari, Arachnoidea)<br />
e. Histophysiologie der corpora cardiaca. (Insecta)<br />
PIATT, J. A.B., M.A., Ph.D. — Dept of Anat., School of Med., Univ. of<br />
Pennsylvania, PHILADELPHIA 4, Pa, U.S.A.<br />
a. Nerve pattern in heterotopically transplanted embryonic limbs. Ambystoma<br />
punctatum and tigrinum (Urodela)<br />
b. Nerve pattern in forelimb resulting from substitution of other parts of<br />
the CNS for the brachial segments of the spinal cord. Ambystoma<br />
(Urodela)<br />
c. Regeneration of the spinal cord in the adult frog. Rana (Anura) (in<br />
collaboration with Miss M. PIATT)<br />
PIEPHO, H. Dr Phil.. Prof. — Zool. Inst, der Univ. Gottingen, Mathem.-<br />
Naturw. Fak., Bahnhofstr. 28, GoTTINGEN, Deutschland<br />
a. Metamorphose. Galleria mellonella (Lepidoptera)<br />
b. Polaritat der Rumpfsegmente wahrend der Metamorphose. (Lepidoptera)<br />
PINCUS, G. Dr, Prof. — Worcester Foundation for Exper. Biol., 222 Maple<br />
Ave, SHREWSBURY, Mass., U.S.A.<br />
a. Physiology of reproduction. (Mammalia)<br />
h. Early development of eggs. (Mammalia)<br />
PLETZEN. R. van D.Sc. — Dept of Zool., Univ. of O.F.S., BLOEM-<br />
FONTEIN, South Africa<br />
(no embryological work in progress)<br />
POLEZAEV, L. V. Prof. — Inst, of Animal Morphol. of the Acad, of Sci.<br />
of the U.S.S.R., B. Kaluzskaja 33, MOSKOU. Russia<br />
PORTMANN, A. Dr Phil., Prof. — Zool. Anstalt der Univ.. Rheinsprung<br />
9, BASEL, Schweiz<br />
(no embryological work in progress)<br />
POULSON. D. F. B.S., Ph.D., Prof. — Osborn Zool. Lab.. Yale Univ.,<br />
NEW HAVEN 11, Conn., U.S.A.<br />
a. Mid-gut: genesis and differentiation. Drosophila melanogaster (Diptera)<br />
b. Chromosomal control of differentiation. Drosophila melanogaster<br />
(Diptera)<br />
c. Neurogenesis in normal and genetically deficient embryos. Drosophila<br />
melanogaster (Diptera)<br />
PRETO PARVIS. Mrs V. Dott. Med., Prof. — 1st. di Anat. umana norm.<br />
deirUniv. di Milano, Via Mangiagalh 31, MILANO. Italia<br />
a. Modifications of contents in nucleinic acids and of the nuclear apparatus<br />
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