368 
New York Academy of Sciences, Meeting of Biological Section, 
Feb. 13, 1893. 
A paper on the “Functions of the Internal Ear” was presented by 
D' F. S. Leer, based upon study of Dog-Fish. The results of experi- 
ments were given showing that the semi-circular canals are sensory organs 
for dynamical (rotational) equilibrium, otolithic parts for statical (resting) 
equilibrium. Each canal appreciates movement in its own plane, and by 
a definite functional combination of canals all possible rotational move- 
ments are mediated. This theory explains compensating movements of 
eyes, fins and trunk. The method of experiment was that of sectioning 
the branches of the acoustic nerve and stimulation (by rotational move- 
ments) of the swimming fish. 
In a paper by Basurorp Dean on the Marine Laboratories of Europe 
a series of views were shown of the stations of Naples, Banyuls, Ros- 
coff, Plymouth, Arcachon, the Helder, St. Andrews. 
H. F. Ossorn described the foot of Artionyx, the new member 
of the order Ancylopoda, Core. It is distinguished from Chalico- 
therium by the character of ancle and pes, which present a marked re- 
semblence to the Artiodactyla, while Chalicotherium represents these 
structures as found in Perissodactyla. Both genera are ungulate in ancle 
joint but the phalanges terminate in claws, and in view of the double 
parallelism between these two forms and the two sub-divisions of Ungu- 
lata, it was suggested to divide the Ancylopoda into the Artio- 
nychia and Perissonychia. 
Basurorp Dean, r. s. 
Biol. Section. 
Personalia. 
Lausanne. Prof. N. LorwEntHAL hat seine Stellung als a. o. Pro- 
fessor der Histologie niedergelegt und verläßt Lausanne. 
Basel. Die Doctoren P. und F. Sarasin werden für einige Jahre 
nach Celebes gehen. Während ihres Aufenthaltes dort ist die Adresse 
derselben: C. W. Kreidel’s Verlag, Wiesbaden. 
Die Herren Mitarbeiter werden dringend gebeten, ihre Wünsche 
bez. der Anzahl der ihnen zu liefernden Sonderabdrücke auf das 
Manuscript zu schreiben. Die Verlagshandlung wird alsdann die 
Abdrücke in der von den Herren Verfassern gewünschten Anzahl 
unentgeltlich liefern. 
Erfolgt keine andere Bestellung, so werden fünfzig Abdrücke 
geliefert. 
ii, 11,79 
Frommannsche Buchdruckerei (Hermann Pohle) in Jena. 
