HAUSEN, P. Dr. — Max Planck Inst, fiir Biol., Abt. Beermann, Spemannstr. 34, 74 TU- 

 BINGEN. W.Germany 

 HAY, Miss E. D. M.D., Prof. — Dept of Anat., Harvard Med. School, 25 Shattuck St.. 



BOSTON. Mass. 02115, U.S.A. • 



HAY. Miss M. F. Ph.D. — A.R.G. Unit of Reprod. Physiol. 6 Biochem., Univ. of Cambridge, 



307 Huntingdon Rd., CAMBRIDGE. England 

 a Effect of embryotoxic agents on pre-implantation embryos in vivo and in vitro. 



Oryctolagiis cuniculus (Lagomorpha) 

 b Relationship between embryo and corpus luteum. Ovis aries (Artiodactyla) 

 HAY, R. J. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University 



Parkway, BALTIMORE. Md. 21210, U.S.A. 

 a Animal viruses (esp. tumor viruses) as tools in studying embryonic development. Gallus 



galltis (Aves) (in collaboration with J. D. EBERT and Mrs. M. YOSHIKAWA- 



FUKADA) 

 HAYAKAWA, Miss H. — Dept. of Biol., Osaka Kyoiku Univ., Tennoji-ku. OSAKA, 543 



Japan 

 a Cytodifferentiation during cleavage. (Amphibia) 



h Nucleo-cytoplasmic interaction during early development. (Amphibia) 

 c Cell interactions in relation to cytodifferentiation. (Amphibia) 

 HAYASHI, I. M.D., Prof. — Pathol. Dept., School of Med., Nagasaki Univ., 93 Sakamoto- 



machi. NAGASAKI, Japan 

 HAYASHI, Y. Ph.D., Prof. — Inst, of Zool., Fac. of Sci., Tokyo Kyoiku Univ.. Otsuka 



3-29-1, Bunkyo-ku, TOKYO, Japan • 



a Analysis of epithelio-mesenchymal interaction in the formation of the beak. Gallus spec. 



(Aves) 

 h Biochemical analysis of muscle differentiation. Rana nigromaculafa (Anura), Gallus spec. 



(Aves) (in collaboration with T. HIRABAYASHI) 

 c Cytochemical studies on primary induction. Trifurus pyrrhogasfer (Urodela) 

 HAYEK. H. Dr.med., Dr.phil., Prof. — Anat. Inst.. Wahringerstr. 13, WIEN 9, Austria • 

 HAYNES, J. F. Ph.D. — Dept. of Zool., Univ. of Maine, ORONO, Me. 04473 U.S.A. 

 a Growth and form regulation in polyps. (Hydrozoa) 

 b Ultrastructural studies of differentiation. (Coelenterata) 

 HEARSON, L. L. Ph.D — Dept. of Biol.. Wabash Coll. CRAWFORDSVILLE. Ind. 



47933. U.S.A. 

 a Investigations of proliferation. DNA synthesis and nerve fiber pattern-; in forelimb blas- 



temata. Ambystoma mexicanum (Urodela) 

 h Cytochemistry of dedifferentiation and redifferentiation in denervated limbs. Ambystoma 



maculatum, A. opacum (Urodela) 

 c Investigation of proliferation patterns in aneurogenic forelimb blastemata. Ambystoma 



maculatum, A. opacum (Urodela) 

 HEATH. H. D. Ph.D.. Prof. — Dept of Biol. Sci.. Calif. State Coll. HAYWARD. Calif. 



94542, U.S.A. 

 a Starvation and temperature effects on larval growth rates. Taricha torosa. Ambystow.a 



tigrinum (Urodela) 

 h Control of nematocyst distribution and tentacle number. Hydra littoralis. Chlocohydra 



viridissima (Hydroidea) 

 HEAYSMAN (WAKELING). Mrs. J. E. M. Ph.D. — Dept. of Zool. and Comp. Anat., 



Univ. Coll. London. Cower St., LONDON W.C.I, England 

 a Study of cell relations in tissue culture. Gallus gallus (Aves), Mus musculus (Rodentia) 



(in collaboration with M. ABERCROMBIE and Mrs. S. M. PEGRUM (HALL)) 

 b Cell migration within the embryo. Gallus domesticus (Aves) (in collaboration with Mrs. 



M. R. BELLAIRS, Dept. of Anat.) 

 HEBARD, Miss C. N. A.B. — Dept. of Biochem., School of Med., Univ. of Pennsylvania, 



PHILADELPHIA. Pa.. U.S.A. 

 HEBY, O. — Zoophysiol. Inst.. Univ. of Lund. Helgonavagen 3. 223 62 LUND. Sweden 

 a Polyamines in developing larvae. Calliphora spec. (Diptera) 

 HEGGESTAD, C. B. M.D., Ph.D.. Prof. — Dept. of Anat., School of Med., Univ. of 



Minnesota. MINNEAPOLIS, Minn. 55455, U.S.A. 

 HEIM, W. G. Ph.D.. Prof. — Dept. of Biol., The Colorado Coll., COLORADO SPRINGS, 



Colo. 80903, U.S.A. • 



a Serum proteins during ontogeny. Gallus domesticus (Aves), Mus rattus (Rodentia) 

 h Alpha-2 macroglobulin during development, regeneration and various physiological states. 



Mus rattus (Rodentia) 

 c Localization of developmental control factors in the embryonic cortex. Rana pipiens (Anura) 

 HEIN, Miss R. R. Ph.D.. Prof. — Biol. Dept., Uppsala College, Prospect St., EAST 



ORANGE,, New Jersey 07019. U.S.A. 

 a Effect of chemical agents (usually metals) on development and possible correlation with 



the effect of selected enzyme systems present in developing and regenerating tissues. 



Dugesia dorotocephala (Turbellaria), (Echinodermata) 



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