570 
rendus hebdomadaires de la société de biologie, Série IX, Tome IV, 
1892, No. 23, 8. 566—568. 
— — Sur le developpement du penis et du clitoris chez les foetus hu- 
mains, Avec 2 planches. Journal de l’anatomie et de physiologie, 
Année XXVIII, 1892, No. 3, 8S. 225—281. 
Rheinstädter, A., Praktische Grundzüge der Gynäkologie. Ein Hand- 
buch der Frauenkrankheiten für praktische Ärzte. Zweite Auflage. 
Mit 56 Figuren im Texte. Berlin, August Hirschwald, 1892. 8°. 
IX 420 SS. (Auch angeborene Bildungsfehler enthalt.) 
von Sicherer, Otto, Uterus bicornis bicollis. Pyometra und Pyocolpos 
lateralis infolge von Atresia vaginalis dextra. Mit 1 Abbildung. Archiv 
für Gynäkologie, Band 42, 1892, Heft 2, S. 339—352. 
(Fortsetzung in der nächsten Nummer.) 
Aufsätze. 
Nachdruck verboten. 
Studies in the Phylogenesis of the Larynx. 
Preliminary communication by Hargis H. Wırper, M. D., Ph. D. 
With 3 figures. 
The present paper gives a brief account of results obtained 
from the study of the Amphibian larynx. This article is intended to 
preface a more detailed account, which will appear as soon as the 
investigation shall have embraced enough forms to be called in any 
sense complete. 
1. Cartilages of the respiratory tract. 
The only respiratory cartilages occurring among the Amphibia are 
the Arytaenoids (plus the little cartilages of SANTORINI when present), 
Cricoids and the tracheal cartilages. The Thyroids, to be formed 
later from the 2nd and 3rd gill arches (pu Bors) are still in the 
service of the branchial or hyoid systems, and the epiglottis has not 
yet developed. 
a) Previous investigations. 
According to HENLE, the earliest investigator of the subject, 
there appear, on the sides of the respiratory tract, a pair of cartila- 
ginous rods. 
This condition is seen in Proteus, which he considers primitive. 
In the higher Amphibians, these rods divide into a superior and 
