fossilis, Cyprinus caipio (Teleostei), Ambystoma mexicanum (Urodela) 

 DAVIDSON, D. R.; Ph.D. - M.R.C. Clin, and Popul. Cytogenet. Res. Unit, Western Gen. Hosp., 



EDINBURGH EH4 2XU, Scotland, UK 

 a 1 . Regionalisation of the source mesoderm responsible for regional differences in skin appendage 



patterns and its relation to axial segmentation; 2. organisation responsible for temporal co-ordina- 

 tion of spatial differences in the onset of organ primordium morphogenesis. (Teleostei; Amphibia; 



Reptiha), Gallus domesticus (Aves) 

 b Morphogenesis of the feather primordium, in particular relative roles of cell division and cell 



movement in forming dermal condensations in cultured dorsal skin. Gallus domesticus (Aves) 

 DAWES, C. M.; Ph.D. - Dept. of Physiol., Royal Vet. Coll., Royal CoUege St., LONDON NWl OTU, 



England 

 a Respiration and acid-base regulation. Gallus domesticus (Aves) 

 b The physiological basis of hatching. Same species as a 

 DEAK, I.; Dr.phil., Prof. - Zool. Inst, der Univ. Zurich, Winterthurerstr. 190, 8057 ZURICH, 



Switzerland 

 a Origin, fate, distribution and organization of muscle precursor cells; differentiation of muscle 



ultrastructure, especially myofibrils (biochemistry of mutations affecting muscle development). 



Drosophila melanogaster (Diptera) 

 b Theoretical considerations concerning the estabhshment and distribution of positional information 



in young embryos (prior to neurulation or its equivalent). (Metazoa) 

 c Experiments involving cytoplasmic, nuclear or cellular transplantation in young embryos. Same 



species as a 

 DE BERNARDI LARIA, Ms. P.; Ph.D., Prof. - 1st. di Zool., Univ. di Milano, Via Celoria 10, 20133 



MILANO, Italy 

 a Transcription and translation during neurulation. Xenopus laevis (Anura) 

 b RNA action in induction and differentiation of somites. Gallus domesticus (Aves) 

 DECROLY (BRIERS), Ms. M.; D.Sc.Chim. - Dept. of Molec. Biol., Free Univ. of Brussels, 67 rue des 



Chevaux, 1640 RHODE-ST-GENESE, Belgium 

 DELARUE, M.; Dr.3e Cycle - Lab. d'lmmunol., Univ. Paris VI, 4 place Jussieu, 75230 PARIS Cedex 



05, France 

 a Nuclear and cytoplasmic transplantation. (Bufonidae, Anura) 

 DELAY, B. - Lab. Souterrain du C.N.R.S., fiquipe de Biol. Souterraine, 09200 MOULIS, Saint-Girons, 



France 

 a Influence des facteurs abiotiques (temperature) sur le developpement embryonnaire des especes 



souterraines. Bathysciola spec, Speonomus spec, Antrocharis spec. (Bathysciinae, Coleoptera) 

 b Influence des facteurs abiotiques sur la reproduction. (Bathysciinae, Coleoptera) 

 DELBOS, Ms. M.; Ing.Rech. - Lab. de Biol. Anim. A, Univ. de Bordeaux I, Av. des Facultes, 33405 



TALENCE Cedex, France 

 a Analyse experimentale des facteurs de la migration des cellules germinales 

 DELEANU, M.; Dr.med. - Lab. of Embryol., Ctr. of Hyg. and Publ. Health, Bv. Mihai Viteazul 24, 



1900 TIMI5OARA, Rumania 

 a Tissue culture; embryo culture. Gallus domesticus (Aves) 

 DE LEO, G.; Dr.nat.sci., Prof. - Zool. hist., Univ. of Palermo, Via Archirafi 18, 90123 PALERMO, 



Italy 

 a Fine structure of oocytes and eggs. Bolina spec. (Ctenophora), Ciona intestinalis (Ascidiacea), 



Paracentrotus Uvidus (Echinoidea) 

 b Fine structure of nucleated and non-nucleated halves of eggs. Paracentrotus lividus (Echinoidea), 



Gona intestinalis, Ascidia malaca (Ascidiacea) 

 c Electron microscopy of mitochondrial genomic activity in activated eggs and non-activated 



enucleated halves. Paracentrotus lividus (Echinoidea), PhaUusia mamillata, Ascidia malaca, Ciona 



intestinahs (Ascidiacea) 

 d Characterization of mitochondrial DNA of unfertilized, fertilized, and cleaving egg. Ciona intes- 



DE LUCCHINI, Ms. S.; Dr.biol. - Inst, of Histol. and Embryol., Univ. of Pisa, Via A. Volta 4, 56100 

 PISA, Italy 



a Mitotic and lampbrush chromosomes; DNA analysis and in situ RNA/DNA hybridization. (Uro- 

 dela) 



DEMEUSY, Ms. N.; Prof. - Lab. de Biol. Anim., U.E.R. Sciences, Univ. de Caen, 14032 CAEN Cedex, 

 France 



a Ultrastructure of the integument of the carapace after removal of the moulting glands. Carcinus 

 maenas (Decapoda, Crustacea) 



b Ultrastructure of the mandibular glands. Same species as a 



DENIS, H. A.; D.Sc, Prof. - Centre de Genet. Molec du C.N.R.S., 91190 GIF-sur-YVETTE, France 



a Mecanismes biochimiques de I'oogenese. Xenopus laevis (Anura), Pleurodeles waltl (Urodela) 



DENKER, H.-W.; Dr.rer.nat., Dr.med., Prof. - Dept. of Anat. and Reprod. Biol., Rhein.-Westf. Techn. 

 Hochschule, Melatener Str. 21 1, 5100 AACHEN, BRD (Germany) 



a Implantation: dissolution of blastocyst coverings, attachment, invasion (morphology, histochem- 

 istry, biochemical mechanisms, characterization and role of trophoblastic and uterine enzymes 

 and inhibitors, particularly proteases and protease inhibitors, and their endocrine control). Oryc- 

 tolagus cuniculus (Lagomorpha), Mus musculus, Mesocricetus auratus, Cavia porcellus (Rodentia), 

 Felis sylvestris catus (Carnivora) 



b Determination of trophoblast and inner cell mass during cleavage and blastocyst formation. 

 Oryctolagus cuniculus (Lagomorpha), Mus musculus, Mesocricetus auratus (Rodentia), Felis syl- 

 vestris catus (Carnivora) 



31 



