b. Autoradiografische Untersuchungen iiber unterschiedliche Reproduk- 

 tionsraten im Eu- und Heterochromatin als Weg zur Kerndifferenzierung. 

 Musca domestica (Diptera) 

 BIJELIC, N. — Inst, de Biol., Fac. de Med., Salata, ZAGREB, Yougoslavie 

 a. Analysis of early embryonic development by means of X-rays. Rattus 

 norvegicus albinus (Rodentia) (in collaboration with N. SKREB) 

 BIJTEL, Miss J. H. Dr.Sci., M.D.. M.I.I.E. — Dept. of Anat. and Embryol., 

 State Univ., Oostersingel 69, GRONINGEN, Netherlands 



a. Experiments concerning the factors which determine the normal course 

 of the outgrowing pronephric duct. Ambystoma mexicanum, Ttiturus 

 taeniatus, Xenopus laevis (Amphibia) 



b. Development and phylogenetic origin of the columella auris. Ambystoma 

 mexicanum, Triturus taeniatus, Xenopus laevis (Amphibia) 



c. Development of the naso-lacrimal duct. Xenopus laevis (Anura) 



d. Development of the naso-lacrimal duct. Mus musculus albinus (Rodentia) 

 BILEWICZ, S. Dr.phil., Prof. — ZaHad Embriol. U.W., Krakowskie 



Przedmiescie 26/28, WARSZAWA 64, Poland 



a. Experimental study on the genesis of superfoetation. Mus musculus alb. 

 (Rodentia) 



b. Experimental study on the mechanism of development of various types 

 of double monsters. Gallus domesticus (Aves) 



BILLETT, F. S. B.Sc, Ph.D. — Dept. of Biol, as Applied to Med., Middle- 

 sex Hosp. Med. School, Cleveland St., LONDON W. 1, England 



a. Morphogenetic effects of desoxyribonucleic acid. Ambystoma mexicanum, 

 Xenopus spec. (Amphibia) 



b. Effect of "anti-metabolites" on early development. Gallus spec. (Aves) 

 BILLINGHAM, R. E. M.A.. Ph.D., D.Sc — Wistar Inst., 36th St. at 



Spruce, PHILADELPHIA 4. Pa., U.S.A. 

 BISHOP, D. W. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 

 115 W. University Parkway, BALTIMORE 10, Md., U.S.A. 



a. Contractile protein and contractile mechanisms of spermatozoa. (Mam- 

 malia) 



b. Development of immunologic capacity. Cavia spec. (Rodentia) 



c. Immunologic impairment of spermatogenesis. Cavia spec. (Rodentia) 

 BISHOP, M. W. H. M.A., Ph.D. — Roy. Veter. Coll., Royal College St., 



LONDON N.W. 1, England 

 a. Investigations on gametes, gametogenesis, fertilization and early devel- 

 opment. (Mammalia) 

 BLACK, R. E. L. B.A., Ph.D. — Dept. of Embryol., Div. of Biol., California 

 Inst, of Technol., PASADENA 4, Cal., U.S.A. 



a. Antigens in marine embryos. ( Echinodermata) 



b. Metabolism of marine embryos. (Gephyrea, Echinodermata) 

 BLACKLER, A. W. C. M.Sc, Ph.D. — Inst, de Zool. et Anat. comp., 



Univ. de Geneve, Rue de Candolle, GENEVE, Suisse 

 BLANDAU, R. J. Ph.D., M.D. — Dept. of Anat., School of Med., Univ. of 

 Washington, SEATTLE 5, Wash., U.S.A. 



a. Mechanisms of ovulation. 



b. Mechanisms of implantation. 



c. Tissue culture of granulosa cells. 



BLECHSCHMIDT, E. Dr.med., o.o.Prof . — Anat. Inst, der Univ., Kreuz- 

 bergring 36, GOTTINGEN, Deutsche Bundesrepublik 



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