SYXONYJIS AND REFERENCES. 481 



tliree folia or laminse of the lateral lol;e of the cerebellum. It rests in the Fossa appen- 

 dieularis 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 flacruhis has sometimes 

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



§ 1234. Lobulus hypocampae, LI. hmp.— Fig. 116; PI. I, Fig. 1 ; PI. II, Fig. 3; PI. 

 Ill,' Fig. 6; PI. IV, Fig. 14, 17. 



8^71. — Alveus (,?), subiculnm (V), protuberantia natiformis. 



The senior author had suggested (5>, 135) for this the single name monticulus, but 

 witiidrew it (it/, 5o7) on the representation of Spitzka (7. 165) that the name had been 

 applied to a part of the cerebellum. 



§ 1255. Lobus lateralis (cerebellii, L. l.—V\g. 116 ; PI. I, Fig. 1, 2 ; PI. II, Fig. 3 ; 

 PI. IV, Fig. 15. Gray. A, 631 : Quain, A, II, 517. 



Syn. — 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.—Yig. 116, 117 ; PI. I, Fig. 1, 2 ; PI. II, Fig. 3, 4 ; 

 PI. 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 oS 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 rhiuoccelia ; see |;e?"« &nApes. 



§ 1257. Lobus temporalis, L. tmp.—?\. I, Fig. 2 ; PL IT, Fig. 3 ; PI. Ill, Fig. 5 ; PI. 

 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 hypocaiupm, and the surface ventro- 

 mesad of the F. posMiinalls is tlie Tractus postrhinalis. 



§ 1258. Lyra {az.\ ly.—Fig. 122 ; PI. 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 ; PI. II, Fig. 4; PI. Ill, Fig. 6, 13; 

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



Syn. — 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. 



§ 1280. Medicornu, mcu.—Fig. 113, 118, 119, 121 ;' PI. Ill, Fig. 11 ; PI. IV, Fig. 

 14, 15 ; § 1147. Gray, A, 626 ; Qttain, A, II, 541. 



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



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

 temporalis ; its floor is formed by the hypocampa. 



§ 1261. Medipedunculus (cerebelli), }npd.—% 1141. Gray, A, 655 ; Quain, A, II, 516. 



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

 pontis. 



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

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

 (.9, 136) under a misapprehension. 



§ 1262. Mesencephalon (az.), msen.—F\g. 110-114, 116-118; § 1061. Gray, A, 111 ; 

 Quain, A, II, 755. 



Syn. — Midbrain. It embraces the opiici, postoptici and crura. 

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