But 17 Camp 



BUTLER, E. G. Ph.D.. Sc.D.. Prof. — Dept of Biol., Princeton Univ., 

 PRINCETON, N.J., U.S.A. 



a. A study of the mechanics of the formation of the regeneration blastema. 

 The influence of nerves on blastema formation. Regression in nerveless 

 non-regenerating limbs. Ambystoma punctatum and Ambystoma opacum 

 (Urodela) 



h. Blastema formation and regeneration in limbs in which proximodistal 

 polarity has been reversed. Ambystoma punctatum and Ambystoma opa- 

 cum (Urodela) 



c. Regression (reduction) and subsequent reconstitution. Clavelina lepadi- 

 [ormis (Tunicata, Urochordata) 



d. Effects of ultraviolet radiation on limb development and limb regene- 

 ration. (Urodela) 



BUTROS, J. M.A. — Dept of Biol., Emory Univ., EMORY UNIVER- 

 SITY, Ga, U.S.A. 

 a. Physico-chemical studies on cell division. Ilyanassa obsoleta (Gastro- 

 poda) 



BUTZ. P. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., 

 Deutschland. 

 a. Entwicklung der Sehleistung (Lepidoptera; Culicidae, Dipteta) (ge- 

 meinsam mit H. LuDTKE und G. HAAS) 



CAIRNS, J. M. A.B., M.S., Ph.D., Asst Prof. — Dept of Anatomy, School 

 of Medicine, University of Oklahoma, OKLAHOMA CITY, Okla., 

 U.S.A. 



a. The induction of regional characteristics of feather structure. Gallus 

 domestlcus (Aves) 



b. The action of genes (frizzled and silky) in the development of the feather. 

 Gallus domestlcus (Aves) 



c. Study of the differentiation of the limb structure. Gallus domestlcus 



(Aves) 

 CALLAN, H. G. M.A., D.Sc, Prof. — Dept of Zool., The University, 

 ST ANDREWS, Scotland (U.K.) 

 a. Reciprocal hybridisation with a view to studying cytoplasmic effects 

 and hybrid meiosis. Triturus vulgaris, palmatus and cristatus (Urodela) 

 h. Structure of chromosomes in oocytes. Triturus cristatus carnifex 

 (Urodela) 



c. Morphological and physiological studies on germinal vesicle nucleus. 

 Structure and properties of nuclear membrane, sap, etc. Triturus spp., 

 Xenopus laevis (Amphibia) 



d. Structure of sperm heads and determination of shape. (Amphibia) 

 CAMBAR, R. Dr — Lab. de Biol. Gen., Fac. des Sci. de Bordeaux, 40 Rue 



Lamartine, TALENCE (Gironde), France, 

 a. Developpement du systeme renal. Xenopus laevis (Anura) (Normal 

 Table) (en collaboration avec R. WILLIAUME) 

 CAMPENHOUT, E. van F.I. I.E., Dr, Prof. — Inst. d'Anat., Univ. de 

 Louvain, 38 Rue des Recollets, LOUVAIN, Belgique. 



a. Embryological development of the innervation of the gonads. (Aves) 



b. Regeneration of the central nervous system in the embryo. Gallus (Aves) 



c. Development of the peripheral nervous system. Homo (Primates) 



d. Development of the visceral nervous system. Crocodilus (Reptilia) 



e. Development of the cranial nerves. Crocodilus (Reptilia) 



