320 _ 
examined by generations both of skilled anatomists and of students 
in the laboratories. I have myself searched over a very large number 
in the hope of discovering another hermaphrodite individual; but 
so far without success. 
Two more points of interest may be noticed. In the first place 
the hermaphroditism is perfectly definite and clear-cut: only this one 
gonad on the left side produces ova, and the other 49 gonads pro- 
duce only spermatozoa. In the second place, whatever cause may 
have determined the sex of this one half-sesment it must apparently 
have come into operation comparatively late in embryonic life, when 
the rudiments destined to give rise to this gonad separated from those 
which gave rise to the male gonads. 
Merton College, Oxford, Sept..25th, 1912. 

Personalia. 
Odessa. Priv.-Doz. D. K. TRETJAKoOFF ist zum Professor an der 
phys.-math. Fakultät der Universität Odessa und Vorstand der Institute 
für Zootomie und Anatomie ernannt worden. Adresse: Odessa (Rußland), 
Zootomisches Institut der Universität. 
Lemberg. Professor Dr. Hemrich Kapyı, Direktor des Anato- 
mischen Instituts, ist an den Folgen einer Leicheninfektion gestorben. 
Abgeschlossen am 23. Oktober 1912. 
Weimar. — Druck von R. Wagner Sohn. 
