GYfiVAI, T. A. — Inst, of Histol. and Embryol., Med. Univ., Tiirzolto u. 



58, BUDAPEST IX, Hungary 

 a. Histological and histochemical investigations on the developing and adult 



heart. Triturus cristatus (Urodela) 

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



Solnavagen 1, STOCKHOLM 60, Sweden 



a. Postnatal development of lymphatic system; endocrinological influences 

 (thyroid, adrenals, thymus). Cavia cobaija (Rcdentia) 



b. Postnatal development of newborns in different oxygen concentrations, 

 with special consideration to malformations of the eyes, lungs and central 

 nervous system. Mus musculus (Rodentia) 



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

 Mus musculus (Rodentia) 



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

 land 



a. Beeinflussung der Entwicklung von Embryonen durch Chemikalien 

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

 IPC, MH, Colchicin; Radiomimetica z.B. N-Lost, TEM). Eranthis hie- 

 malis ( Ranunculaceae) 



b. Untersuchungen iiber die Entwicklungsvorgange an teratogen beeinfluss- 

 ten pflanzlichen Vegetationskegeln. 



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

 Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz 



a. Merogonic development. Triturus spec. (Urodela) 



b. Developmental studies on lethal factors. Drosophila melanogaster (Dip- 

 tera) 



c. Developmental studies on pteridine-synthesis. Drosophila melanogaster 

 (Diptera) 



d. Developmental studies on imaginal discs. Drosophila melanogaster (Dip- 

 tera) 



HAGELIN, L. O. Fil.mag. — Zootom. Inst.. Univ. of Stockholm, 70A Rad- 

 mansgatan, STOCKHOLM, Sweden 

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

 HAGET, A. Dr.es Sci. — Lab. de Zool., Fac. des Sci. de Bordeaux, 40 Rue 

 Lamartine, TALENCE, Gironde, France 

 a. Analyse experimental de la morphogenese embryonnaire de la tete. 

 Leptinotarsa spec. (Coleoptera) 

 HAGGQVIST, G. Prof. — Dept. of Histol., Karolinska Inst., Solnavagen 1, 

 STOCKHOLM 60, Sweden 



a. Uber die Einwirkung von schwerem Wasser auf die embryonale Ent- 

 wicklung. Mus musculus (Rodentia) 



b. Ober die Entwicklung der roten Blutkorperchen bei tetraploiden Tieren. 

 (Vertebrata) 



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

 tullsgatan 16, STOCKHOLM Va., Sweden 



a. Factors influencing the rate of fertilization; the problem of protection 

 against polyspermy. (Echinoidea) 



b. Conditions enhancing cross fertilization. (Echinoidea) 



c. Chromosomal behaviour in cross fertilization. (Echinoidea) 



HALE, L. J. Ph.D. — Dept. of Zool., Univ. of Edinburgh, West Mains 

 Road, EDINBURGH 9. Scotland 



51 



