UNILATERAL CEREBELLAR AGENESIA 381 
Fig. 5 Dorsal view of bulb and midbrain, cerebellum removed. 1, nodule 
of abnormal cerebellar cortex. 
Fig. 6 Transverse section through the upper cervical cord. Weigert-Pal. 
2, right posterior horn; 3, left dorsal spino-cerebellar tract. 
Fig. 7 Transverse section through the bulb at the caudal extremity of the 
inferior olivary nucleus. Weigert-Pal. 4, right nucleus cuneatus; 5, right nuc- 
leus gracilis; 6, right external nucleus of column of Burdach; 7, lateral external 
arcuate fibers; 8, left nucleus arcuatus; 9, left medial accessory inferior olivary 
nucleus; 10, left principal inferior olivary nucleus; //, aberrant pyramidal bundle. 
