c. Xanthophores and xanthophyll deposition in color phenotypes. Orijzias 



latipes (Teleostei) 

 HJELMMAN, G. Prof. — Anat. Inst, Univ. of Helsinki, HELSINKI, 



Finland 



(no embryological work in progress) 

 HOADLEY. L. F.I. I.E.. Prof. — Biol. Lab., Harvard Univ., Divinity Ave., 



CAMBRIDGE 38, Mass., U.S.A. 

 HOGE, A. — Institute Butantan, SAO PAULO, Brazil 



a. Intersexuality. Bothrops insularis (Ophidia) (in collaboration with H. 



BELLUOMINI and G. SCHREIBER, Belo Horizonte) 

 HOGUE. Miss M. J. A.B.. Ph.D., Prof. (Emer.) — Dept. of Anat., School 



of Med., Univ.. of Pennsylvania, PHILADELPHIA 4, Pa., U.S.A. 



a. Tissue cultures of the central nervous system (brain, spinal cord, sym- 

 pathetic and parasympathetic ganglia, neuroblastomas). The reaction of 

 tissue cultures from normal and hypersensitized animals to polio virus. 

 (Mammalia) 



b. The effect on brain tissue cultures of viruses which cause clinical diseases 

 of the central nervous system, such as herpes simplex, german measles, 

 mumps, herpes zoster and chicken-pox. Homo sapiens (Primates) 



HOLLANDER, W. F. B.A., M.S., Ph.D. — Dept. of Genetics, Iowa State 

 Coll., AMES, Iowa, U.S.A. 



a. Genetic mutants — polydactylism lethal types. Mus musculus ( Rodentia) 



b. X-ray induced dominant lethal effects. Mus musculus (Rodentia) 



c. X-ray induced chromosome-translocation effects. Mus musculus 

 (Rodentia) 



d. Genetic mutants. Columbia livia (Aves) 



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

 a. Experimental investigation of the embryo (determination, prospective 



significance of embryonic areas). (Araneae, Arachnoidea) 

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



sitetsparken 3, COPENHAGEN (Z), Denmark 



a. Continued investigations on embryology. (Insecta) 



b. Studies on larval hair development. (Lepidoptera) 



c. Studies on the development of the lungs. (Mammalia) 



HOLTER, H. Ph.D., M.I.I.E. — Physiol. Dept., Carlsberg Lab., 10 Gl. 



Carlsbergvej, COPENHAGEN, Valby, Denmark 



(no embryological work in progress) 

 HOLTFRETER, J. K. F. Ph.D., F.I.I.E., Prof. — Dept. of Biol., Coll. of 



Arts and Sci., Univ. of Rochester, ROCHESTER 20, N.Y., U.S.A. 



a. Accessory tails "induced" by chemically inert substances. Xenopus laevis 

 (Anura) (Urodela) 



b. Studies on competence changes in aging ectoderm. Pleurodeles Waltlii 



c. Production of a third median eye bij UV irradiation. Ambystoma punc- 

 tatum (Urodela) 



HOLTZER, H. Ph.D. — Dept. of Anat., School of Med., Univ. of Pennsyl- 

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



HOLYOKE, E. A. Ph.D. — Dept. of Anat., Coll. of Med., Univ. of Nebras- 

 ka, OMAHA 5, Nebraska, U.S.A. 



HOOKER, D. Ph.D., Sc.D. (Hon.), M.I.I.E., Prof. (Emer.) — 110 Living- 

 ston St., NEW HAVEN 11, Conn., U.S.A. 

 — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. 



59 



