SYNONYMS AND REFERENCES. 481 



three folia or laminae of the lateral lobe of the cerebellum. It rests in the Fossa appen- 

 dlcularis of the periotic bone (Fig. 59, Fs. ap.). It is larger in dogs (see Wilder, 11, 217, 

 Fig. 1), and very large and long in the bear and seal. The name flocculus has sometimes 

 been applied to it, but its homology with that part of the human cerebellum is not clear, 



1254. Lobulus hypocampae, LL hmp.Fig. 116; PI. I, Fig. 1 ; PI. II, Fig. 3; PI. 

 HI, Fig. 6 ; PL IV, Fig. 14, 17. 



Syn. Alveus (?), subiculum ( e i) t protuberantia natiformis. 



The senior author had suggested (.9, 135) for this the single name monticulus, bat 

 withdrew it (14, 537) on the representation of Spitzka (7, 165) that the name had been 

 applied to a part of the cerebellum. 



1255. Lobus lateralis (cerebelli), L. I. Fig. 116 ; PL I, Fig. 1, 2 ; PL II, Fig. 3 ; 

 PL IV, Fig. 15. Gray, A, 634 ; Quain, A, II, 517. 



tSyn. The lateral lobe of the cerebellum. This and the mesal lobe or vermis are not 

 well defined from each other. The Lobulus appendicularis is an appendage of the L. 

 lateralis. 



1256. Lobus olfactorius, L. ol.Fig. 116, 117 ; PL I, Fig. 1, 2 ; PL II, Fig. 3, 4 ; 

 PL IV, Fig. 15-19. Gray, A, 636 ; Quain, A, II, 506. 



Syn. Bulbus olfactorius, olfactory lobe, olfactory nerve. 



The enlarged extremity of each half of the rhinencephalon which gives off the olfac- 

 tory nerves. In man, it and the crus are so small as to have been called olfactory nerve. 

 It contains, however, a distinct rhinoccelia ; see pero and pes. 



% 1257. Lobus temporalis, L. tmp.PL I, Fig. 2 ; PL IT, Fig. 3 ; PL III, Fig. 5 ; PL 

 IV, Fig. 14. Gray, A, 616 ; Quain, A, II, 530. 



That portion of the hemisphere which is caudad of the Sylvian fissure. Its dorsal 

 limit is not defined. Its ventral end is the Lobulus hypocampce, and the surface ventro- 

 inesad of the F. postrhinalis is the Tractus postrhinalis. 



1258. Lyra (az.\ fy. Fig. 122 ; PL IV, Fig. 14. Gray, A, 628 ; Quain, A, II, 544. 



Syn. Psalterium, corpus psalloides, lamina medullaris triangularis cerebri, spatium 

 trigonum. 



This name is applied to part of the ventral surface of the fornix. It is not well defined. 



1259. Medicommissura (az.\ mcs.Fig. 117, 122 ; PL II, Fig. 4; PL III, Fig. 6, IS; 

 PL IV, Fig. 16 ; 1143. Gray, A, 630 ; Quain, A, II, 546. 



8yn. Commissura media, commissura mollis, the middle or soft commissure. 



The junction of the two thalami in the dorsal part of the diaccelia. It seems to consist 

 of cells rather than fibers. 



1260. Medicornu, mcu. Fig. 113, 118, 119, 121 ; PL III, Fig. 11 ; PL IV, Fig. 

 14, 15 ; 1147. Gray, A, 626 ; Quain, A, II, 541. 



Syn Cornu medium, cornu descendens, cornu inferius, digital cavity. 



The strongly curved extension of the cella media of the proccelia to the tip of the L. 

 temporalis ; its floor is formed by the hypocampa. 



1261. Medipedunculus (cerebelli), mpd.% 1141. Gray, A, 655 ; Quain, A, II, 516, 



Syn. Pedunculus medius, crus medium, processus e cerebello ad pontem, brachiura. 

 pontis. 



The subcylindrical fibrous mass connecting the pons with the cerebellum. It is over- 

 hung and concealed by the L. lateralis. It was called pontibrachium by the senior author 

 (f>, 136) under a misapprehension. 



1262. Mesencephalon (az.\ msen.Fig. 110-114, 116-118 ; 1061. Gray, A, IH -, 

 Quain, A, II, 755. 



Syn. Midbrain. It embraces the optici, postoptici and crura. 

 31 



