REFERENCES AND QUOTATIONS. 



1 Luthardt, Apologetische Vortrage. 7 Vortrag. P. 129. 



2 Philosophia quaerit, theologia invenit, religio possidet verr 

 tatem. 



3 Tageblatt der Naturforscher-Versammlung in Leipzig, 1872. 

 P. 12. The discourse was also printed separately. 



4 A. Fick, Physiologic, 1860. 



Any one who wishes to be more deeply instructed in the 

 problem of sensation, as an universal primary characteristic of the 

 constituent elements of matter, may be referred to the very lucid 

 and interesting work, " Das Unbewuste vom Standpunkt der 

 Physiologic und Descendenztheorie" (Berlin, 1872). Published 

 anonymously. 



6 L. Geiger, Ueber den Ursprung der Sprache. (Stuttgart, 

 1869.) P. 207. 



7 Roller, Ueber Elementartheile und Gewebe und deren Unter- 

 scheidung. Roller, Untersuchungen, etc. 1871. 



8 Karl Ernst v. Bar, Ueber Entwickelungsgeschichte der 

 Thiere, Beobachtung und Reflexion, 1828. 



9 Ib. I. 223. 



19 Ib. I. 230, &c. 



11 Credner, Elemente der Geologic, 1872. P. 253. 



12 Agassiz, Essay on Classification, 1858. " It exhibits every- 

 where the working of the same creative Mind, through all times, 

 und upon the whole surface of the globe." 



13 Rutimeyer, Beitrage zur Kenntniss der fossilen Pferde. 

 Verhandlung der naturtbrschenden Gesellschaft in Basel, 1863. 

 111.642. 



14 The passages are from an occasional address Oratio de 

 ellure habitabili contained in the Amcenitates academicae. " Initio 



