ii8 Journal of Comparative Neurology. 



Preparation. — The dorsal third of the organ was sliced off. The project- 

 ing parts of the postpilea were crowded dorso-cephalad and kept in this posi- 

 tion till hardened by means of pledgets of absorbent cotton. Alcohol was the 

 hardening agent employed. The result has been to disclose features which are 

 not seen without special preparation. Points illustrated are, 



a. The massive, hypertrophied pilea. 



b. The pons and the peduncles of the cerebellum. 



c. The caudal part of the postvermis, part of pyramis, uvula, nodulus, and 

 vallecula. 



d. The kilos, [valvula semihinarts, postvelum, hinteres Marksegel.) 



e. The metatela and plexus. 



f. The cestus. 



g. The metapore. 



h. The eighth nerve. 



i. The oblongata. 



/. The flocculus and paraflocculus. 



