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OVERGAARD, C. Regeneration. Invertebrates. IV. 2. EV. 



PADOA. E. Experimental sex reversal of larval Amphibians. 



Illb. 17. J. 



Control of metamorphosis. Amphibians. V. 2. J. 



PAI, S. (data not yet received). 



PANIJEL, J. Histochemistry of nucleic acids in the gametogenesis and 

 development of Parascaris equorum (Nematodes). Illb. 2c. c. C. 

 (in collaboration with J. PASTEELS) 



PAO, W. K. (data not yet received). 



PAPI, F. Reproduction, Cytology in Rhabdocoela. I. 4. C. 



PARMENTER, Ch. L. A continuation of the study of the origin of 

 the diploid and other chromosome numbers in parthenogeneticallv 

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An analysis of the "second factor" in the first cleavage in the 



artificial parthenogenesis of the frog egg. Rana pipiens and R. pa- 

 lustris. Illb. 4. J. 



PASCHMA, M. Embryology of Enchytraeidae (Oligochaeta) . I. 2a. C. 

 PASQUINI, P. Effects of antimitotics on early development. Rana 



esculenta. Illb. 2a. e. J. 



(in collaboration with M. A. BARBASETTI) 



Effects of antimitotics on the regeneration of peripheral nerves. 



Amphibians. IV. 5. J. 



(in collaboration with S. LEGHISSA) 



PASTEELS, J. J. Centrifugation of amphibian blastula-gastrula. Va- 

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General survey of Turtle development. Chrysemis, Pseudemys and 



Chelone. II. 2a. K. 



Histochemistry of nucleic acids in the gametogenesis and develop- 

 ment of Parascaris equorum (Nematodes). Illb. 2c. c. C. 

 (in part in collaboration with J. PANIJEL) 



Cytochemical observations on the first stages of Amphibia, various 



species. Hlb. 2c. c. J. 



(in collaboration with J. BRACHET)* 



PATTEN. B. M. (data not yet received). 



PEACOCK, A. Development of vertebral column in man. I. 11. M. 



PEASE, D. C. (data not yet received). 



PEERS, Miss D. J. An investigation into the spawning habits and 



earlv development of the common carp, Cyptinus carpio. I. 2a. 1. 

 PEHRSON, G. T. Development and morphology of the laterans system 



in the head. Dipnoans and Characinids. II. 8. 1. 



PENNERS. A. Regeneration auf verschiedenen Altersstadien von 



Tubifex rivulorum (Clitellata) , (Oliqochaeten) . IV. 2. C. 



Geschwulstproblem bei Lumbricus (Clitellata), (Oligochaeten) . 



Hid. 5. C. 

 PERITZ, Miss K. Ontogenesis of the skull of Hynobius fuscus. 



II. 11. J. 



PERLMANN, H. P. Serological and chemical studies on the proteins 



of developing sea urchin eggs. Paracentrotus lividus and Arbacia 



lixula. Illb. 2c. c. G. 



