306 C. JUDSON HERRICK 



Fig. 7 Section 265, through the auricular lobe, the body of the cerebellum and 

 the rostral end of the recessus lateralis (rJ.). In the medial wall of the recessus 

 lateralis are two eminences separated by a shallow ependymal groove. The 

 dorsal eminence is the body of the cerebellum (cb.), which has been differentiated 

 in the rostral wall of the recessus lateralis of earlier embryonic stages; the ventral 

 eminence is the rostral end of the area acustico-lateralis (a.ac.), which at this age 

 has been partially incorporated into the cerebellum. The eminentia subcere- 

 bellaris tegmenti (em.s.t.) has merged with the motor tegmentum of the oblongata. 

 The arrangement of the fiber tracts in the stratum album of the ventral part of the 

 section has assumed the form characteristic of the oblongata in general. 



Fig. 8 Section 270, immediately caudad of the junction of the body of the cere- 

 bellum (c.ch.) with the eminentia cerebellaris ventralis {em.cb.v.), the latter lying 

 medially of the area acustico-lateralis (a.ac). The caudal end of the tectum 

 mesencephali is included in the section and the decussatio veli lies a few se'tions 

 farther caudad. 



