Herrick, Morphology of Bony Fishes. 23 



It may be useful to prefix the following 



OUTLINE. 



I. — Additional remarks on the histology of the hemispheres. 

 II. — Tracts from the hemispheres. 



1. Tccnia thalami (?) 



2. Dorsal peduncles. 



3. Ventral peduncles. 



4. Fornix and basal prosencephalic tract. 



III. — The pnethalamus and tuber cinereuni. 



1. Niduli of praethalamus. 



2. Tuber cinereuni and tract to ventral commissure. 



3. Mammillaria, post-cinerea, and conus prcecommis- 



suralis. 



4. Hypophysis and saccus vasculosus. 



IV. — 77^1? interoptic commissures. 



I. C. veritralis. 

 C. transversa. 

 C. minor. 

 C. horizontalis. 

 C. superior tuberi. 

 V. — The dorsal region of the thalamus. 



1. Epiphysis and dorsal sac. 



2. Habena. 



3. Meynert's bundle. 



4. Nidulus corticalis and posterior longitudinal fascicle. 

 VI. — Optic nerve and brachii. 



VII. — Tectum optic um afui its tracts. 

 VIII. — The nidulus genie ulatus e.xternus. 

 IX. — The colliculi. 

 X . — The pes pedtinculi. 



1. The hypoaria. 



2. Nidulus ruber (rotundas) and nidulus niger. 



3. Connections with cerebellum. 



XI. — Nidulus subthalamic us and central gray matter. 

 XII. — The pons, middle peduncle of cerebellum, and commissura 

 ansulata. 

 I. Additional remarks on the histology of the cerebrum. 



A careful examination of our sections fully substantiates the 



