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52. Krukenberg, C. F. W. Vergleichend-Physiologische Vortrage 



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P. 429. Notes on shifting to medium of different composi- 

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 Ann. de chimie, T. ii., 1816, p. 52. Czevny (Amoebae), 

 Arch. Mikr. Anat, v., 1869, p. 158, etc. 



53. Marcacci, a. Azione degli Alcaloidi sulle piante, sulle 



fermentazioni e sulle uova, alia luce e nella oscurita. 

 P.-v. Soc. Toscana di Scienze Naturali (Pisa), vol. v., 

 1887, p. 285. 



E.g. , ova of Amphibia under action of quinine did not develop 

 in light, but passed through several stages in darkness. 



54. Martens, E. v. On the Occurrence of Marine Animal 



Forms in Fresh Water. (Translated paper. Ann. 

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55. Plateau, F. Recherches physico-chimiques sur les Arti- 



cules aquatiques. Mem. Acad. Belg., xxxvi., 1870. 

 Bull. Acad. Belg., T. xxxiv., 1872. 

 Changes of medium — water. 



56. . . Influence de I'eau de mer sur les animaux d'eau 



douce, et de I'eau douce sur les animaux marins. 

 Comptes E,endus, xcvii., pp. 467-469. 

 Change of medium. 



57. Rauber, a. (See 22 under I.) 



Hyper-oxygenated water influences the development of the 

 gill regions. 



58. . Oceanversuclie an Embryonen und Erwachsenen. 



SB. Naturf. Ges. Leipzig, 1883, pp. 79-85. 



Experiments with alteration of medium. Sensitiveness of 

 fresh-water forms to salt, etc. 



59. Sagot, P. Influence de I'etat hygrometrique sur la vegeta- 



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60. Schmankewitsch, W. Zur Kenntniss des Einflusses der 



aiisseren Lebensbedingungen auf die Organisation der 



Thiere. Zeitschr. f. wiss. Zool., xxix., 1877. 



Important influence of salinity (and aeration) of water — on 

 Artemia and Branchipus, 



