Hoi 44 Horn 



HOLM, K. A. Dr Phil. — Uppsala Univ., Zool. Inst., UPPSALA, Sweden. 

 a. Experimental investigation of the spider embryo (determination, pros- 

 pective significance of embryonic areas). (Araneae, Arthropoda) 

 HOLMDAHL, D. E. Med. Dr, Prof. — Anat. Inst., Univ. Uppsala, UPP- 

 SALA, Sweden, 

 a. Untersuchungen iiber die friihe Korperentwicklung. (Vertebraten) 

 HOLMGREN, N. F. Dr Sc, Prof. (Emer.) — Zootom. Inst., Univ. of 

 Stockholm, 116, Drottninggatan, STOCKHOLM, Sweden, 

 a. Pronephros of Myxinoids. Myxine glutinosa, Heptatrema hexatrema 

 (Cyclostomata) 

 HOLST CHRISTENSEN, P. J. Dr Phil. — Univ. Inst, for Aim. Zool., 

 Universitetsparken 3, COPENHAGEN 0, Denmark. 



a. Studies on the embryology of Insects. Cochlidion limacodes (Lepido- 

 ptera) 



b. Studies on the development of mammalian lungs. Talpa europaea (In~ 

 sectivora) 



HOLTER, H. Ph.D. — Cytochem. Dept, Carlsberg Lab., 8, Gl. Carls- 

 bergvej., COPENHAGEN Valby, Denmark. 



a. Nature of physiological gradient in sea urchin embryos. Paracentrotus 



b. Oxygen consumption at fertilization. Sea urchins ( Echinodermata) 

 HOLTFRETER, J. K. F. Ph.D., Prof. — Dept of Biol., Coll. of Arts and 



Sci., Univ. of Rochester, ROCHESTER 3, N.Y., U.S.A. 



a. Effects of carcinogens on successive developmental stages of amphibian 

 embryos. Amblystoma, Rana pipiens, Xenopus laevis (Anurans, Uro- 

 deles) 



b. Chromatographic studies of amino acids in the eggs and embryos of 

 various species. Amblystoma, Rana, Xenopus (Amphibia) and many 

 Invertebrates 



HOLTZER, H. Ph.B., B.S. — Dept of Zool., Univ. of Chicago, CHICAGO 

 37, 111., U.S.A. 



a. Development of regional functional properties in the spinal cord, tested 

 by defect and transplantation experiments. (Amphibia, Urodela) (under 

 direction of P. A. WEISS) 



b. Selectivity in outgrowth and terminations of embryonic nerves. (Verte- 

 brates) (under direction of P. A. WEISS) 



HOOKER, D. Ph.D., Prof. — Dept of Anat., School of Med., Univ. of 

 Pittsburgh, PITTSBURGH 13, Pa., U.S.A. 

 a. Study of the physiological responses of human fetuses. (Mammalia) 

 HORI, R. — Biol. Inst., Fac. Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, 

 Japan. ^ 



a. Oxidation-reduction pattern in early development of the fish. Oryzias 

 latipes 

 HORN, E. C. B.S., A.M., Ph.D., Prof. — Dept of Zool., Duke Univ., 

 DURHAM, N.C., U.S.A. 



a. Regeneration of lens from dorsal iris. Pseudacris nigrita feriarum 

 (Amphibia) 



b. Organogenesis of developing ammocoetes and changes at metamorphosis. 

 Ichthyomyzon (species undescribed) (Cyclostomata) (in collaboration 

 with J. R. BAILEY) 



c. A comparative study of amphibian skeletal changes through meta- 

 morphosis. Amblystoma maculatum, Pseudacris nigrita feriarum 



