PRIESTER, W. de M.Sc. — Zool. Lab., Univ. of Leiden, Kaiserstr. 63, LEIDEN. Nether- 

 lands f f /rk 

 a Electron microscopic studies of developmental stages. Calliphora erythrocephala (Diptera) 

 PRINS. H. J. — Dept. of Anat. and Embryol., Univ. of Amsterdam, Mauritskade 61, AM- 



STERDAM-O., Netherlands 

 a Analysis of fracture-repair. Amby stoma mexicamim (Ucodela) (in collaboration with 



H. A. L. TRAMPUSCH) 

 PRITCHARD. E. T. Ph.D., Prof. — Dept. of Oral Biol.. Univ. of Manitoba. WINNIPEG, 



Manitoba, Canada 

 a Cholesterol esterase activity in developing brain. Rattus norvegicus (Rodentia) 

 b Lipid content of developing salivary gland and possible role in secretion. i?a«us norfe^icus 



(Rodentia) 

 PROPPER, A. Doct.3e Cycle — Lab. de Zool.. Inst, des Sci. Nat., Fac. des Sci., Place 



Marechal Lcclerc. 25 BESANgON. France 

 a Organogenese de la glande mammaire par la methode des cultures d'organe et des greffes 



embryonnaires. Mus musculus (Rodentia). Oryctolagus cuniculus ( Lagomorpha) (en col- 

 laboration avec L. GOMOT) 

 PROVENZANO. A. J. Ph.D., Prof. — Inst, of Marine Sci., Univ. of Miami, 1 Rickenbacker 



Causev^ay, Virginia Key, MIAMI. Fla. 33149. U.S.A. 

 PRUDHOMME. J. C. Dr.Spec. — Sect, de Biol. Gen. et Appl.. Univ. de Lyon. 43 Bd. du 



II Novembre 1918, 69 VILLEURBANNE. France 

 a Culture d'organes in vitro. Bombyx mod (Lepidoptera) 

 PUCCIA. E. D.Sc. — 1st. di Zool., Univ. di Palermo. Via Archirafi 18. 90123 PALERMO. 



Italy 

 a RNA synthesis in embryonic development. (Ascidiae) 

 h The biochemistry of regeneration. (Annelida) 

 PUCCINELLI. Mrs. I. Dr.Nat.Sci. — 1st. di Zool. e Anat. Comp. dell'Univ.. Via A. Volta 



4. PISA. Italy 

 a Development and cytology. (Tricladidea, Tiirbellaria; Hirudinea, Annelida) 

 PURKO. J. Ph.D.. Prof. — Dept. of Zool.. Coll. of Sci., Univ. of Western Ontario, 



LONDON. Ont.. Canada 

 a Biological action of alkylating agents (sulphur and nitrogen mustards) and mechanism of 



resistance to their effects in embryos and in fibroblasts grown in culture. (Teleostei), Mus 



musculus (Rodentia) 

 b Mechanisms underlying processes in early embryogenesis and cell division, using various 



metabolic inhibitors of DNA, RNA and proteins, and correlating their biological and 



biochemical effects. (Teleostei) 

 c Biological action of the "chemosterilant" hempa (hexamethylphosphoric triamide) and 



mechanism of resistance to its effects in embryos and in fibroblasts grown in culture. 



(Teleostei), Mus musculus (Rodentia) 

 PUZA, V. C.Sc. — Dept. of Biol., Med. Fac, Charles Univ., gimkova 870. HRADEC 



KRALOVfi. Czechoslovakia 

 a Muscle cell development in tissue culture (amitosis, origin and causes of multinuclearity) . 



Gallus domesticus (Aves), Rattus norvegicus, Mus musculus (Rodentia) 

 h Nucleolus during myogenesis in vitro studied by phase-contrast time-lapse cinemato- 

 graphy. Gallus domesticus (Aves), Rattus norvegicus (Rodentia) (in collaboration with 



J. GAYER and M. HROCH) 

 PUZANOVA, Mrs. L. MUDr., C.Sc. — Dept. of Anat., Charles Univ., U nemocnice 3. 



PRAHA 2. Czechoslovakia 

 a Development of the internal structure of muscles. Rattus albus (Rodentia), Homo sapiens 



PYLILO. Miss I. V. — Dept. of Embryol., Leningrad Univ., Mendeleevsky St. 5. LENIN- 

 GRAD B-164. U.S.S.R. 



a Regeneration. Beroe cucumis (Ctenophora) 



QUAGLIA A. Dr.nat.sci. — 1st. di Anat. Comp.. Univ. di Bologna. Via Belmeloro 8. 

 BOLOGNA (103). Italy 



QUEVEDO. W. C, Jr. Ph.D., Prof. — Div. of Biol, and Med. Sci.. Brown Univ.. 

 PROVIDENCE. R.I. 02912. U.S.A. 



a Genetic regulation and developmental variations of multiple forms of tyrosinase in melano- 

 cytes. Mus musculus (Rodentia) 



RABAEY. M. M.D.. Prof. — Ophthalmol. Clinic, Univ. Hosp., De Pintelaan. GENT, 



Belgium r -^ , tt c 



RADECKA, Mrs. E. ERDMAN D.Sc. — Zaklad. Zool. Ogolnej, Inst, of Zool., Univ. of 



Wroclaw, ul.Sienkiewicza 21, WROCK,AW, Poland 

 RADO (LUSER), Mrs. G. D.Sc. — 1st. di Zool. e Anat. Comp., Univ. di Trieste, Via 



Alfonso Valerio. 32 TRIESTE. Italy 

 a Bidder's organ differentiation. Buio bulo (Anura) ,ti-> at-icct^ 



RADOS. I. D.D. — Inst, of Histol. and Embryol.. Med. Univ.. Tiizoltd u. 58. BUDAPEST 



IX. Hungary 

 a Early morphogenesis. Gallus domesticus (Aves) 



HI 



