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MoCOT, O. R. 1930. — The iiitlueiice of teniiieiatuie, hydrogen- 

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MoCoY, Q. E., Downing, V. F. and V.\N Voorhis, S. N. 1941. — 

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NOLF, L. O. 1932. — Experimental studies on certain factors 

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PiNTNER, Th. 1922. — Die vermutliehe Bedeutung der Hel- 

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Rogers, W. P. 1939. — The physiological ageing of Ancylostoina 

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Schmidt, W. J. 1937. — Doppelbrechung und Feinbau der 

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Stannard, J. N., McCoy, 0. R., and Latchpord, W. B. 1938. 

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STEPANOW-GBlGORlErvv, J. and HoKiM'Li, R. 1926. — Ober Bezie- 

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SZWEJKOWSKA, G. 1929. — Recherehes sur la physiologic de la 

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Wendt, H. 1936. — Beitrage zum Entwicklungszyklus bei Oxy- 

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Wottge, K. 1937. — Die stofflichen Veranderungen in der 

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Zawadowsky, M. 1916. — Role de 1 'oxygene dans le processus 

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1926. — Zum Mechanismus der Wirkung von Zyankalium 

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1928. — The nature of the egg-shell of various species 

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Zawadowsky, M. and Schalimow, L. G. 1929. — Is autoin- 

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Zawadowsky, M. and Orlow, A. P. 1927. — Is there any pos- 

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Zviaginzev, S. N. 1934. — Contribution to the history of devel- 

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371 



