c. The effect of various antimetabolites on embryonic development. (Echi- 

 noidea) 

 GWATKIN, R. B. L. M.A., Ph.D. — King Ranch Lab. of Reproductive Phys- 

 iol, School of Veter. Med., Univ. of Pennsylvania, PHILADELPHIA 

 4, Pa., U.S.A. 



a. Organ culture of fallopian tubes. (Mammalia) (in collaboration with 

 J. D. BIGGERS) 



b. Culture of eggs. (Mammalia) (in collaboration with J. D. BIGGERS) 



c. Action of viruses and nucleic acids on early development. (Mammalia) 



d. Nature of the hypertrophic process m embryonic bones. (Mammalia) 

 GYEVAI (T6TH), Mrs. A. T. — Inst, of Exp. Med. of the Hung.Acad.Sci., 



Morphol. Dept., Szigony u.43, BUDAPEST IX, Hungary 



a. Comparative investigations on the conducting system of the embryonic 

 heart. Various spp. (Vertebrata) 



b. Changes in the electrophysiological properties of the heart muscle fibres 

 during ontogeny. Various spp. (Vertebrata) 



GYLLENSTEN, L. J. W. Med.Dr. — Dept. of Histol., Karolinska Inst., Sol- 

 navagen 1, STOCKHOLM 60, Sweden 



a. Regeneration, differentiation and growth of the lymphatic system. Cavia 

 cobaya (Rodentia) 



b. Physiological factors in the postnatal development of the visual cortex. 

 Mus musculus (Rodentia) 



HACCIUS, Miss B. Dr., Prof. — Botan. Inst, der Univ., MAINZ, Deutsche 

 Bundesrepublik 



a. Beeinflussung der Entwicklung von Embryonen durch Chemikalien 

 (Wachstumsregulatoren, z.B. 2,4-D., TIBA, « NAA; Antimitotica, z.B. 

 I.P.C., MH, Colchicin; Radiomimetica, z.B. N-Lost, TEM). Eranthis hie- 

 malis ( Ranunculaceae) 



b. Untersuchungen iiber die Entwicklungsvorgange an teratogen beeinfluss- 

 ten Vegetationskegeln. 



HADORN, E. Dr.Phil., F.I.I.E., Prof. — Zool.-vergl.Anat. Inst., Naturwiss. 



Fak., Univ. Zurich, Kunstlergasse 16, ZORICH, Schweiz 

 a. Range and stability of morphogenetic fields and determination in imaginal 



discs after culturing of proliferating fragments in vivo. Drosophila 



melanogaster (Diptera) 

 HAGELIN, L. O. Fil.lic. — Zool. Inst., Univ. of Stockholm, 70A Radmans- 



gatan, STOCKHOLM, Sweden 

 a. Development of labyrinth organ. Petromyzon spec. (Cyclostomata) 

 HAGET, A. Dr. es Sci., M.I.I.E., Prof. — Lab. de Zool. exper., Fac. des 



Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France 



a. Analyse experimentale de la morphogenese embryonnaire de la tete. Lep- 

 tinotarsa spec. (Coleoptera) 



b. Role du systeme nerveux dans la morphogenese embryonnaire des pattes. 

 Leptinotarsa spec. (Coleoptera) 



c. Recherches sur l'edification de la blastule et de la gastrule. Leptinotarsa 

 spec. (Coleoptera) 



HAGSTROM, B E. Fil.Dr. — Wenner-Grens Inst, for exper. Biol., Norr- 



tullsgatan 16, STOCKHOLM Va., Sweden 

 HAIGH, G. M.B., Ch.B. — Dept. of Anat., Fac. of Med., Univ. of Sheffield, 



SHEFFIELD, England 



(no embryological work in progress) 



65 



