REFERENCES AND QUOTATIONS. 313 



" O. Schmidt, Die Spongien der Kiiste von Algier, 1868, and 

 Versuch einer Spongienfauna des atlantischen Gebietes, 1870. 



" Haecltel, Die Kalkscliwamme. Eine Monographie in Zwei 

 Biinden, Text und einem Atlas mit 60 Tafeln Abbildungen (Berlin, 

 1872). 



" Hilgendorf, Ueber Planorbis multiformis in Steinheimer Siiss- 

 wasserkalk. Monatsbericht des Berliner Akademie aus dem Jahre 

 1866. P. 474, &c. 



" Waagen, Die Formenreihe des Ammonites subradiatus. 

 Beneke's Beitrage, 1869. Vol. 2. 



Zittel, Die Fauna der altern Cephalopoden fuhrenden Tithonbil- 

 dungen. Palaontologische MittheiIungen,.i87o. 



Neumayr,Jurastudien. Jahrbuchdel-geologischen Reichsanstalt, 

 1871. 



L. Wurtenberger, Neuer Beitrag zum geologischen Beweise der 

 Darwin' schen Theorie, 1873. 



" Darwin, The Variation of Plants and Animals under Domesti- 

 cation, 1868. 



" L. Oken, Die Zeugung, 1805. Lehrbuch der Naturphiloso- 

 phie, 1809-11, Pt. 3. 



" I have borrowed the following account from my essay : " Wae 

 Goethe ein Darwinianer ? " (Was Goethe a Darwinist }) Gratz, 

 Leuschner and Lubinsky, 1871. 



Also another small work of mine : " Goethe's Verhaltniss zu den 

 organischen Naturwissenschaften " (Berlin, 1852). To the pas- 

 sages given in the text, which might make Goethe appear as a 

 Darwinist, I may add the following from Eckermann's " Gesprache 

 mit Goethe" (3 Ed. p. 191). "Thus man has in his skull two 

 empty cavities. The question why ? would not go far, whereas 

 the question how.? teaches me that these cavities are remains 

 of the animal skull, which in those inferior organisms exist to 

 a greater degree, and are not entirely lost even in man, notwith- 

 standing his higher elevation." 



" A somewhat depreciative opinion of Goethe's importance in 

 this sphere is pronounced by V. Carus in his " Geschichte der 

 Zoologie" (Munchen, 1872). The reader, may compare: "How 

 little, notwithstanding his repeated study of anatomy, he had 



