Lev 55 Lil 



LEVER, J. Dr Phil. — Zool. Inst., Free Calvinistic Univ., AMSTERDAM, 

 a. Descriptive embryology of Colisa labiosa. (Pisces) Holland. 



LEVI, G. L. Dr, Prof. (Emer.) — Inst, of human Anat., Fac. of Med., Corso 

 Massimo d'Azeglio 52. TORINO, Italy. 



a. Recherches sur les transformations qui se produisent dans les organismes 

 et dans les tissus cultives in vitro pendant l'accroissement. (Vertebres 

 superieurs) 



b. Recherches sur les caracteres de la structure et des proprietes biologiques 

 dans les tissus cultives in vitro. (Vertebres superieurs) 



LEVI— MONTALCINI, Miss R. M.D. — Dept of Zool., Grad. School of 

 Arts and Sci., Washington Univ., Lindell and Skinker Aves, ST LOUIS 

 5, Mo., U.S.A. (from Univ. of TORINO, Italy) 



a. Response of embryonic nervous system to implantation of mouse tumors. 

 Chick embryo (Aves) (in collaboration with V. HAMBURGER) 



b. Origin of sympathetic and parasympathetic nervous system. (Reptilia 

 and Aves) 



LEVI— MONTALCINI, R. M.D. — Dept of Zool., Grad. School of Arts 



and Sci., Washington Univ., Lindell and Skinker Aves, ST LOUIS 5, 



Mo.. U.S.A. 

 a. Control of proliferation and differentiation of the nervous system. Chick 



(Aves) (in collaboration with V. HAMBURGER) 

 LEWIS, F. Th. A.M., M.D., Prof. — Harvard Med. School, 25, Shattuck 



Str., BOSTON 15, Mass.. U.S.A. 



a. The shape of cells in certain early embryonic tissues. Chick, rabbit and 

 man (Higher Vertebrates) 



b. Embryological study of human tracheo-oesophageal fistula. (Mammals) 

 LEWIS, W. H. Dr, Prof. (Emer.) — Wistar Inst, of Anat. and Biol., 



PHILADELPHIA 4, Pa, U.S.A. 



LI. Miss S. C. B.S. — Dept of Zool., Coll. of Sci., Nat. Univ. of Peking, 

 Ching Shan Tung Chieh, PEIPING, China, 

 a. Study of the influence of the optic vesicle on the development of head 

 skeleton and accessory organs of the eye ball, by extirpation of the optic 

 vesicle at tail bud stage. Rana nigromaculata (Amphibia) 



LIAO, Y. K. B.S. — Dept of Zool.. Coll. of Sci., Nat. Univ. of Peking, 

 Ching Shan Tung Chieh, PEIPING, China, 

 a. The reactive capacity of Rana nigromaculata to abnormal inductor seems 

 to be weaker than that of Triton. In order to find out whether the 

 ectoderm of Rana is less sensitive to inductive stimuli Holtfreter's 

 experimental method (1947) was adopted. Isolated gastrular ectoderm 

 of Rana was given a treatment with acid and alkali solution of various 

 length of duration. Thus it will be found whether the pH ranks which 

 cause neural differentiation in Triturus (or Amblystoma) and in Rana 

 ectoderm are different. Furthermore, the cause why Triturus and Rana 

 ectoderms react differently to the same pH rank will also be studied. 



LILLIE, R. S. Ph.D., Sc.D. — Physiol. Lab., Univ. of Chicago, CHICAGO 

 37, 111., U.S.A. — Marine Biol. Lab.. WOODS HOLE. Mass.. U.S.A. 

 a. Artificial activation of unfertilized marine eggs, chiefly of starfish and 

 sea-urchin. Determination of physiological (and physico-chemical) fac- 

 tors concerned in the change of the egg from the resting to the active 

 and developing state. Asterias forbesii and Arbacia punctulata (Echino- 

 dermata) 



