NERVOUS SYSTEM AND SENSE ORGANS OF AMIURUS. 451 



PLATE V. 



Hepresents 20 frontal sections through brain of adult Amiurus, the planes of 

 which are indicated in Figs. 13 and 14, Plate I. The anterior sections are 

 slightly oblique. 



Aq. S. — Aqueduct of Sylvius. 



C. H. — Cerebral hemisphere. 



G. H. L. — Lateral lobe of hemisphere. 



Com. ace. — Commissura accessoria of Mauthner. 



Com. ant. — Commissura anterior. 



Com. cer. inf. —Commissura cerebri inhma of Haller. 



Com. post. — Commissura posterior. 



Com. trans. — Commissura transversa Halleri. 



Cor. Cer. — Cortex of Cerebellum. 



Cor. Val. Cer. — Cortex of valvula cerebelli. 



Epi. — Epiphysis . 



G. H. — Ganglion Habenulae. 



G. I. — Ganglion iuterpedunculare of Gudden. 



Lob. Tri. — Trigeminal lobes. 



Lob. Vag.— Vagus lobes. 



L. I. — Lobus inferior. 



L. L. — Lateral longitudinal fasciculi. 



L. 0. — Lobus opticus. 



M. B.— Bundles of Meynert. 



M. F. —Fibres of Mauthner. 



Mol. Cer. — Molecular layer of cerebellum. 



N. //.—Opticus. 



N. III. — Oculomotoriiis . 



N. IV.— Trochlearis. 



N. V. asc. — Ascending root of fifth. 



-N. V. gen. d. — Dorsal geniculated root of fifth. 



N. VII.— Facialis. 



N. VIII.— Auditory. 



Nucl. Sj>. I. — Nucleus of 1st spinal. 



Nucl. Vag. II. M. — Nucleus of motor root of posterior part of vagus 



group. 

 01. — Olfactory tract. 

 Op. Chi. — Optic chiasma. 

 Pd. — Peduncle of cerebral hemisphere. 

 R. ac. V. — Root of fifth from tuberculum acusticum. 

 R. ac. Vag. I. — Root of vagus group from tuberculum acusticum. 

 -Sec. V. T. — Secondary vago-trigeminal fasciculus. 

 T. L. — Torus longitudinalis. 

 T. 0. — Tectum opticum. 

 T. S. — Torus semicircularis. 

 Tr. 0.— Optic tract. 



