DEGENHARDT, K.-H. Dr.med., Prof. — Inst, fur Humangenet. und vergl. Erbpathol. der 



Univ.. Paul-Ehrlich Str. 41, 6 FRANKFURT/Main. W.Germany 

 DeHAAN, R. L. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. 



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



— Dept. of Biol., Johns Hopkins Univ., Charles and 34th Sts., BALTIMORE, Md. 21218, 



U.S.A. 

 a Morphogenetic movements and cell migration associated with embryonic heart formation 



(microsurgery, cinematography, autoradiography). Gallus gallus (Aves) 

 b Pacemaker formation and the initiation of the heartbeat; developmental electrophysiology 



and spontaneous activity of embryonic heart cells in tissue culture. Same species as a 

 DE HOYOS, E. — Dept. of Pathol, Dartmouth Med. School, HANOVER, N.H. 03755, 



U.S.A. 

 a Electron microscopy of developing islets of Langerhans. Mus musculus (Rodentia) 

 DEKKER, R. A. F. Drs. — Hubrecht Lab. (Intern. Embryol. Inst.), Uppsalalaan 1, Univer- 



siteitscentrum "De Uithof", UTRECHT, Netherlands 

 a Electron microscopy and experimental study of the cell surface and the cortical cytoplasm 



of the presumptive neuro-ectodermal layers of blastulae and young gastrulae. Xenopus 



laevis (Anura) 

 DE LEO, G. Dr.nat.sci. — 1st. di Zool., Univ. di Palermo, Via Archirafi 18. 90123 PALER- 

 MO. Italy 

 a Embryonic development. Sepiola rondeletii (Cephalopoda) 

 b Ultrastructure of eggs. Sabellaria (Polychaeta) , Bolina (Mollusca) 

 DELLA CROCE. N. Dr.Nat.Sci., Prof. — 1st. di Zool., Univ. di Genova, Via Balbi 5, 16126 



GENOVA, Italy 

 a Embryonic development of a parthenogenetic marine form. Penilia avirostris (Cladocera, 



Crustacea) (with S. BETTANIN) 

 b Growth of the embryo. Penilia avirostris (Cladocera, Crustacea) (with S. BETTANIN) 

 c Formation of resting eggs. Penilia avirostris (Cladocera, Crustacea) (with S. BETTA- 

 NIN) 

 DELMAS, A. Prof. — Lab. d'Anat., Univ. Paris V — , Rene Descartes, 45 rue des Saints 



Peres. 75 PARIS Vie, France 

 a Organogenesis and morphogenesis of central nervous system and cerebral cortex. 

 DeLONG, G. R. M.D. — Dept. of Neurol., Massachusetts Gen. Hosp., BOSTON, Mass. 



02015, U.S.A. 

 a Experimental morphogenesis of cerebral cortex and hippocampus, and its genetic control, 



using cell reaggregation and neurological mutants. Mus musculus (Rodentia) 

 b Embryonic development of retino-tectal connections. Gallus domesticus (Aves) 

 DEL RiO. A. G. — Inst, de Biol., Univ. Nac. de Tucuman, Chacabuco 461, S. M. de TUCU- 



MAN, Argentina 

 a Intermediate metabolism during early development: glycolysis. Bufo arenarum (Anura) 

 DE LUCA, V. M.D., Prof. — 1st. di Zool., Univ. di Catania, Via Androne 81, 95124 CATA- 

 NIA, Italy 

 a Physiological and experimental embryology of the earliest developmental stages. Porcellio 



laevis (Isopoda), Eyprepocnemis plorans (Orthoptera) 

 DE MAEYER (CRIEL), Mrs. G. Lic.Sc. — Lab. of Anat, Univ. of Gent, Ledeganckstr. 



35. 9000 GENT. Belgium 

 a Ultrastructure of shell glands and egg shells. Artemia salina (Anostraca, Crustacea) 

 DeMAGGIO, A. E. Ph.D. — Dept. of Biol. Sci.. Dartmouth Coll., HANOVER. N.H. 



03755, U.S.A. 

 a Experimental developmental morphology. (Pteridophyta. Spermatophuta) 

 DENIS, H. A. Dr.es Sci. — Lab. de Biochim., Univ. de Liege, 17 Place Delcour, B-4000 



LIEGE, Belgium • 



a Mecanismes biochimiques de l'oogenese. Xenopus laevis (Anura) 

 DENKER. H.-W. Dr.rer.nat, Dr.med. — . Arbeitsgr. Prof. G. H. M. Gottschewski am Max- 



Planck-Inst. fur Immunbiol., Stefan-Meier-Str. 8, 78 FREIBURG i.Br.. W.Germany 

 a Histochemistry of acid muco substances and enzymes in early stages (fertilization up to 



implantation). Oryctolagus cuniculus (Lagomorpha), Mus musculus, Rattus norvegicus, 



Mesocricetus aucatus, Cavia cobaya (Rodentia) 

 b Development and check of enzymes in early stages. (Mammalia) 

 DENNE, M. P. Ph.D. — Forest Dept., Univ. Coll. of North Wales, BANGOR, Caerns., 



Wales, U.K. 

 a Environmental control of xylem development. Pinus sylvestris, Picea sitchensis (Gym- 



nospermae) 

 DENT. Miss J. Ph.D. — Dept. of Anat., Royal Vet. Coll., LONDON NW1 0TU, England 

 a Developmental pathology of hybrid placentae (ultrastructure). Capra hirctts x Ovis aries 



(Artiodactyla) 

 DENT. J. N. Ph.D., Prof. — Dept. of Biol., Univ. of Virginia, Gilmer Hall, CHARLOTTES- 

 VILLE, Va. 22903, U.S.A. 

 a Metamorphic patterns. Various species (Amphibia) 

 b Induction of regeneration. (Anura) 



44 



