328 ME. J. L. CLAEKE ON THE INTIMATE STEUCTUEE OE THE BEAIN. 
continuous with the fasciculus teres (K'), and increased in size: — Q, Q', 
cut ends of oblique linece transversal ; T, the two oval groups of nuclei much 
increased in size. 
Fig. 41. One lateral half of the human pons Yarolii and medulla seen from its under 
side : — -Y, cut middle peduncle ; X'', fibres winding round it from fourth 
ventricle ; c, restiform body ; Z", band of fibres winding round it from fourth 
ventricle, to side of pons ; X, facial nerve ; Z, auditory nerve ; Z', cut end of 
fifth nerve ; w, olivary body ; Y, anterior pyramid ; W W', pons Yarolii. 
PLATE XII. 
Fig. 42. Transverse section of the posterior portion of the human medulla on left side : — 
c, restiform body ; d o, outer auditory nucleus ; i, inner auditory nucleus ; 
K', fasciculus teres ; S, a network containing several large multipolar cells, 
with intervening longitudinal bundles beneath the fasciculus teres, and in the 
place where the hypoglossal nucleus ends ; H, nucleus of glossopharyngeal 
nerve ; n, slender columnar of longitudinal fibres, now containing a great 
number of nuclei, and connected with glossopharyngeal nerve ( g ) ; U, nucleus 
of motor root of trigeminus ; e eee, cut end of descending root of trigeminus 
at extremity of caput cornu posterioris, or grey tubercle; P, posterior audi- 
tory nerve ; QQ', a large stria medullaris winding over the surface of the 
ventricle, and passing from behind forward along one side of raphe, E. 
Fig. 43. Posterior half of the left side of the human medulla oblongata, just below the 
pons Yarolii: — W, upper end of olivary body; e, grey substance of grey 
tubercle overlain in front by the dark cut ends of the bundles of the descend- 
ing root of the trigeminus ; i, inner auditory nucleus ; d o, outer auditory 
nucleus ; P P', posterior auditory nerve arising from both these nuclei, and 
from radiating fibres (f) of restiform body. A network of fibres proceeding 
from the outer auditory nucleus ( d o ) crosses the grey tubercle ( e ) to the 
central part of the medulla and to the raphe ; in the higher Apes these 
fibres are very numerous and distinct (see fig. 36, Plate XI.). 
Fig. 44. The same, a few sections higher up : — Z, clusters of small cells on the inner 
side of the ganglionic enlargement of auditory nerve ; Q', Q, cut ends of strise 
medullares. 
Fig. 45. Side view of the human medulla oblongata, pons, tubercula quadrigemina, and 
crus cerebri : — c, restiform body entering cerebellum ; P", anterior auditory 
nerve ; one portion of it ascends with restiform body to cerebellum ; C', tri- 
geminus ; E, superior peduncle of cerebellum ; f, fillet ; q\ testis. 
Fig. 46. Transverse section of left lateral half of the medulla oblongata of a child five 
years old, at the anterior auditory nerve : — K', fasciculus teres, connected by 
numerous plexiform fibres with U, the motor nucleus of trigeminus ; e , grey 
