1896.] MICROSCOPICAL JOURNAL. 5 



5. The tip of the snout is a more important tactile organ 

 in the turtle than in the sparrow, as indicated by the 

 large branch of the fifth nerve distributed to it in the 

 former. 



6. The eighth nerve has reached a higher development 

 in the sparrow then in the turtle as indicated by its in- 

 timate connection with its opposite across the meson and 

 its apparent connection through the auditory eminence 

 with the column-like peduncles of the cerebellum, which 

 in their turn form a large commissural connection in the 

 cerebellum. These complicated and extensive structural 

 developments and relations of these parts are probably 

 associated with higher and more complex functions than 

 the simpler conditions in the turtle. 



7. The flocculus of the sparrow is probably homologous 

 with the organ of the same name in man, and has a proton 

 in the turtle and alligator. The pit in the skull for the 

 reception of the flocculus is formed before the flocculus 

 has grown sufficiently to enter it. 



8. Twenty-six nidi and more than thirty fiber tracts 

 with their commissural connections were found in the 

 turtle and many apparent homologues were recognized in 

 the sparrow. Especially in the turtle there is not the 

 continuity of nerve tracts which one is led to believe oc- 

 curs in mammals, but there is rather a more or less inde- 

 pendent, overlapping series of tracts. 



9. The pons is not present. 



10. In the sparrow a large fiber tract from the mesal 

 wall of the cerebrum strongly suggests the f ornicolumn of 

 mammals, but it has more extensive relations. 



11. The conclusion is adopted that the so called cal- 

 losum of birds and reptiles is the rudiment of a forni- 

 commissure with a few fibers which may be truly callosal. 



12. A metapore was not demonstrated in either the 

 sparrow or soft-shelled turtle, although the tels is very 



