a Developmental biology. Cichlidae, Anabantidae (Teleostei) 



PHTHRS, N.; Dr.rer.nat., Prof. ~ Zool. Inst, und Museum der Univ., Olbersweg 24, 2 HAMBURG 13 



B.R.D. (Germany) 

 PETERS, P. W. J.; M.V.D. - Dept. of Teratol. and Pharmacol. Pathol., Natl. Inst, of Pubhc Health 



P.O. Box 1, BILTHOVEN, Netherlands 

 a Morphogenesis of malformations caused by retinoic acid: relation to dose and stage at treatment. 



Rattus norvegicus (Rodentia) 

 b Normal morphogenesis as standard for embryotoxicity procedures. Same species as a 

 c Induction of neural tube defects: relation between malformation and FPal-levels in amniotic 



tluid and maternal serum 

 d Wliole body micro-autoradiography in controlling placenta passage and distribution of labelled 



chemicals. Same species as a 

 PETERS, Th.; Dr.med., Prof. - Anat. Inst, der Univ., Friedrichstr. 24, 63 GIESSEN, B.R.D. 



(Germany) 

 a Alterations in tissue differentiation after x-ray-treatment. Triturus alpestris (Urodela) 

 b Intravital microscopy of normal and x-ray-treated gastrulae and neurulae. Same species as a 

 PETZELT, Ch. P.; Ph.D. ~ Inst, of Cell Res., German Cane. Res. Ctr., Im Neuenheimer Feld 280, 



Postfach 101949, 69 HEIDELBERG 1, B.R.D. (Germany) 

 a Mitosis regulation by a Ca++-ATPase during early development. (Echinoidea) 

 b Antimitotic agents other than antitubulins (cell cultures and Echinoidea) 

 PETZOLDT, U.; Dr.rer.nat. - Inst, fiir Humangenet. und Anthropol. der Univ., Albertstrasse 11, 78 



FREIBURG i.Br., B.R.D. (Germany) 

 a Protein patterns in early development. (Mammalia) 

 b Enzyme activation during embryogenesis. (Mammalia) 

 PEXIEDER, T.; M.D. - Inst. d'Histol. et d'Embryol., Univ. de Lausanne, 9 rue Bugnon, 1011 



LAUSANNE, Switzerland 

 a Tissue dynamics of heart morphogenesis. Gallus domesticus (Aves) 



b Embryophysiology of the circulation in the aortic arches and the heart. Same species as a 

 c Cell death in the development of the heart. Gallus domesticus (Aves), Rattus norvegicus 



(Rodentia), Homo sapiens (Primates) 

 d Teratogenic mechanisms of cardiovascular malformations. Gallus domesticus (Aves), Rattus 



norvegicus (Rodentia) 

 PFANNENSTIEL, H.-D.; Dr. - Zool. Inst, der Techn. Univ., Pockelstr. 10a, 3300 BRAUNSCHWEIG, 



B.R.D. (Germany) 

 a Sexual differentiation and regeneration. Ophryotrocha spec. (Polychaeta) 



b Endocrine control of gametogenesis, general aspects of oogenesis (electrophoresis, autoradio- 

 graphy, electron microscopy). Same species as a 

 PFLUGFELdER, O.: Dr.rer.nat., Prof. (Emer.) - Egilolfstr.35, 7000 STUTTGART-Birkach, B.R.D. 



(Germany) 

 PICARD, J. J.; M.D., Ph.D., Prof. - Lab. d'Embryol., Inst, de Zool., Univ. de Louvain, Sciences 12, 



1 348 LOUVAIN-LA-NEUVE, Bclgiuu) 

 a Biochemistry of cement gland cell differentiation: control by ionic changes in the culture 



medium; modifications in the synthesis of RNA and proteins. Xenopus laevis (Anura) 

 b Biochemistry of the differentiation of permanent cell lines from embryos. Same species as a 

 PICAUD, J. L. - Lab. de Physiol, et Genet, des Crustaces, Univ. de Poitiers, 40 av. du Recteur Pineau, 



86022 POITIERS, France 

 a Cycle sexuel et son controle. Ligia spec, PorceUio spec. (Isopoda, Crustacea) 

 PICOUET, Miss M.J. - Equipe de Neuroembryol., Lab. d'Anat. Comp., Univ. Paris VII, 2 place 



Jussieu, 75221 PARIS Cedex 05, France 

 PIEAU, CI.; Lic.es Sci. - Serv. d'Embryol. Exper., Inst. Pasteur, 20 rue des Mouhns, 951 10 SANNOIS, 



France 

 PIERIK, R. L. M.; Dr., Ir. - Dept. of Horticult., Agric. Univ., Haagsteeg 3, P.O.Box 30, 



WAGENINGEN, Netherlands 

 a Callus induction, callus culture and regulation of morphogenesis in isolated tissues. Anthurium 



andraeanum (Araceae), l^reesia hybr. (Iridaceae), Gerbera jamesonii (Compositae) 

 b In vitro studies on secondary abscission in pedicels. Malus spec. (Rosaceae) 

 PIHAN, J. C; Agr.de Sci., D.Sc. - Inst. Europeen d'Ecol., 57000 METZ, France 

 PIJNACKER, L. P.; Ph.D. - Genet. Inst., State Univ., Biol. Centrum, Kerklaan 30, Postbus 14, 



HAREN (Gr.), Netherlands 

 a Oogenesis, spermatogenesis, spermiogenesis, fertilization, and parthenogenesis. Carausius morosus 



(Phasmida); (Acari, Arachnida) 

 b Quantitative cytochemistry, also in relation to differentiation. Same species as a 

 PILLERI, G.; Dr.med., Prof. - Brain Anat. Inst., Untere Zollgasse 71, (Waldau), 3072 OSTERMUN- 



DIGEN-BE, Switzerland 

 a Entwicklung des Gehirns. Castor canadensis (Rodentia) 

 b Die Protuberantia sclerae am embryonalen Auge. Homo sapiens (Primates) 

 c Ontogenese des Auges. Balaenoptera physalus, B. acutorostrata, Megaptera novaeangliae, 



Delphinus delphis, Tursiops truncatus, Delphinapterus leucas (Cetacea) 

 d Regressive evolution of the eye. Platanista indi, P. gangetica, Inia geoffrensis, Pontoporia 



blainvillei (Plantanistidae, Cetacea) 

 e Entwicklung der Korperform. dieselben Arten wie c 

 f Ontogenese des Zentralnervensystems. dieselben Arten wie c 



g Ontogenesis (especially nervous system). Globicephala melaena (Odontoceti, Cetacea) 

 h General ontogenesis. Platanista gangetica, Pontoporia blainvillei (Cetacea) 



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