108 



sogar die in Xänge und Befiederung des Schnabels . wie in der Be- 

 fiederung der Füße liegenden Hauptunterschiede in manchen species- 

 reichen Gruppen der Vögel vielleicht dem einen oder anderen Or- 

 nithologen für die Aufstellung einer neuen Gattung wichtig genug 

 erscheinen. Eine eingehendere Darstellung werde ich in nächster 

 Zeit an anderer Stelle geben , wobei ich zugleich den Nachweis zu 

 führen gedenke , daß S dater in der oben erwähnten Arbeit die Ab- 

 bildung Forster's auf Tafel II in seiner »Historia Aptenoditae«^ mit 

 Unrecht auf unsere Art bezieht; Forster's Zeichnung stellt ent- 

 schieden die andere Pinguin - Art {A. Pennatiti Gray) dar , was auch 

 mit dem angegebenen Fundort Südgeorgien übereinstimmt. 

 Stuttgart, 24. December 1895. 



4. Notes on the Biology of Phrynosoma cornutum Harlan ^ 



By Charles L. Edwards, Professor of Biology, University of Cincinnati. 



eingeg. 10. Januar 1896. 



While living in Austin, Texas, from May, 1892 to July, 1894, 1 

 had abundant opportunity of verifying previous observations upon the 

 life ot Phrytiosoma, and of adding some notes that so far as I can find, 

 have not been given before this paper. 



'. Phrynosoma cornutum Harlan, in Texan parlance the »horny frog« 

 is easily approached under the natural conditions of its habitat, and 

 with a plentiful supply of live flies I have had no difficulty in keeping 

 from fifty to one hundred of them confined in vivaria for many weeks 

 at a time. Six months of the hot, dry, Texas summer, with long days 

 under the glaring sun, and the ground covered with a layer of fine, 

 lime- stone dust, gives this species of Phrynosoma an ideal environ- 

 ment. ! 



Historical and General, 

 A review of the principal points concerning the bialogy of this 

 familiar genus as brought out in the literature appended, and con- 

 firmed by myself, may be first presented. Not to go back to the origi- 

 nal systematic descriptions of Wieg mann, Girard, Harlan, Hallo- 

 well, Bell, Gray, and Blainville; or to mention the synonymy 

 from the various catalogs of reptiles, the taxonomic needs of this pa- 

 per may be served by reference to Gentry's(lO) review of the genus 

 Phrynosoma. 



{ This cunning little Iguanid is harmless, never biting its captor, 



2 Commentationes Societatis Regiae Scienliorum Gottingensis. Vol. III. 1781. 

 1 Read Dec. 26th , 1895, at the 5th Annual Meeting of the Ohio Academy 

 of Science, Cincinnati Ü. 



