18 . HENRY H. DONALDSON 



and that therefore so far as the conclusions of the earlier paper 

 depend on the observations which have been repeated, they may 

 be considered as well founded. 



BIBLIOGRAPHY 



Donaldson, Henhy H. Weight of the Central Nervous System of the Frog. 

 1902 Decennial Publications, University of Chicago, vol. 10, p. 3-15. 



1908 The Nervous System of the American Leopard Frog, Rana pipiens, 



compared with that of the European frogs, Rana esculenta and 

 Rana temporaria (Fusca). J. of Comp. Neurol, and Psychol., vol. 

 18, no. 2, pp. 121-149. 

 Fubini, S. Gewicht des centralen Nervensystems im Vergleich zu dem Korperge- 

 1S81 wicht des Thiere, bei Rana esculenta und Rana temporaria. Unter- 



such. z. Naturl. d. Mensch, u. d. Thiere, Bd. 12. 



