Bibliography 187 



Shoup, C. S. 



1932. Salinity of the medium and its effects on respiration in the sea-anemone. 

 Ecology 13:81-85. 



Simroth, H. 



1891. Die Entstehung der Landtiere. Leipzig, viii -|- 492. 

 Slonaker, J. R. 



1926. Long fluctuations in voluntary activity of the albiano rat. Amer. J. Physiol. 

 77:503-508. 



Smith, H. M. 



1927. Some fresh-water fishes of Siam. T. Amer. Fisheries Soc. 56:213-226. 

 Smith, H. W. 



1930. Lung-fish. Sci. Mo. 31:467-470. 



1930a. Metabolism of the lung-fish, Protopterns aethiopicus. J. Biol. Chem. 88: 

 97-129. 



1931. Observations on the African lung-fish, Protopterus aethiopicus, and on 

 evolution from water to land environments. Ecology 12:164-181. 



1933. The functional and structural evolution of the vertebrate kidney. Sigma 

 Xi Quar. 21:141-151. 



Snoke, A. M. 



1929. The determination of dissolved oxygen with the micro- Winkler apparatus 

 of Thompson and Miller. Ecology 10:163-164. 

 Snyder, C. 



1909. The physical conditions at the beginnings of life. Sci. Progr. 3:579-596. 

 1911. Life without oxygen, the anaerobic beginnings of life. Ibid. 6:107-134. 

 Spencer, W. P. 



1929. Day and night periodicity in four species of freshwater fishes. Anat. Rec, 

 44:197. 

 Spengel, J. W. 



1904. Schwimmblasen, lungen und Kiementaschen. Zool. Jahrb. Suppl. 7:727- 

 749. 

 Splendore, A. 



1918. Studi neir interesse di una lotta biologica contro le arvicole. Bollet. Ser. 

 B., Ministerio di Agricottura, Rome. 

 Steen, W. B. 



1929. On the permeability of the frog's bladder to water. Anat. Rec. 43:215-220. 

 Stefani, L de 



1929. La faune insulate. L'Universo 10:393-416. 

 Stephen, A. C. 



1930. Studies on the Scottish marine fauna: the fauna of the sandy and muddy 

 areas of the tidal zone. Trans. Roy. Soc. Edinburgh 56:291-306. 



1930a. Additional observations on the fauna of the sandy and muddy areas of 

 the tidal zone. IbiJ. 56:521-535. 

 Stephenson', T. A. 



1942. Causes of intertidal zonation. Nature 150:158. 



