srsoNYirs and references. 491 



§ 1329. Tuber cinereum (as.). T. cm.— Fig. Ill, 113, 116-118, 123 ; PI. II, Fig. 3, 4; 

 PI. Ill, Fig. 5, 9, 11 ; § 1074 (E). Gray, A, 631 ; Quain, A, II, 535. 



The gray eminence at the cephalic part of the Area crural is just caudad of the chiasma. 

 To it is attached the hypophysis by the iufundibuluin which covers the ruesal Foramen 

 infandibuli. The Tuber cinereum is really continuous with the terma, but the chiasma 

 forms an ectal interruption. 



§ 1330. Tuberculum Rolando, Tbcl. Eol.—% 1190. Gray, A, 613; Quain, A, II, 510. 

 According to the American Jour, of Neurology, etc. (1, 102), the elevation herein named 

 Area ovalis is homologous with the Tuberculum Rolando or I'uhercolo cinerto. 



% 1331. Valvula (az.), m— Fig. 111-114, 117; PI. II, Fig. 4; PI. Ill, Fig. 7 ; §§ 1141, 

 1165. Gray, A, 631 ; Quain, A, II, 553. 



Syn. — Valvula Vieussenii, vv. cerebelli, vv. Willisiana, vv. magna cerebri, velum 

 interjectum cerebelli, velum meduUare anticum. 



The delicate and transparent roof of the longer and cephalic portion of the'epicoelia. 

 Cephalad it is continuous with the postoptici, and caudad with the cerebellum just cepha- 

 lad of the highest part of the epicoelia. Near its cephalic end arise the NN. trochleares. 



We have not ascertained whether the valvula is covered by a fold of pia ; apparently 

 there is between it and the overhanging cerebellum only a little connective tissue. Neither 

 do we know the precise constitution of the delicate substance of the valvula ; it is so thin 

 that it might well be included with the other telaB as the epitcla. 



§ 1333. Velum (interpositum), {az.), vl.—Fig. 122 ; §§ 1143, 1144, 1156. Gray, A, 628 ; 

 Quain, A, II, 545. 



As has been admitted elsewhere, our knowledge of the velmn is incomplete, especially 

 in respect to its relation with the diatela. As commonly described, and as appears to be 

 the case in the cat, it is the fold of pia between the dorsal aspect of the mesencephalon 

 and diencephalon and the ventral aspect of the superincumbent fornix, a part of the pros- 

 encephalon. Theoretically, and doubtless actually in the embryo mammal, the two layers 

 of this fold are simply continuous at the line of junction of the prosencephalon with the 

 diencephalon ; but the growth of the former and its recumbency upon the latter brings 

 them into contact, and perhaps their distinction is altogether lost. 



Primarily, too, the diencephalic layer must have been in contact with the primitive 

 roof of the diaccelia and entered into the formation of the diatela ; but the close approxi- 

 mation and, perhaps, fusion of the two layers in the adult renders it possible to remove- 

 them together, and the diatela which remains must consist, therefore, of merely the 

 endyma with the atrophied nervous substance of the roof. 



The relations of the velum to the proplexus are referred to in § 1395. 



§ 1333. Vermis (cerebelli), {az.), vm.—¥\g. 114 ; PL I, Fig. 1, 2 ; PI. IV, Fig. 15 ; § 1300. 

 Huxley, A, 64. 



8yn. — Lobus medius cerebelli. 



The name vermis seems to be used in anthropotomy in a restricted sense for a portion 

 of the median lobe of the cerebellum, but Huxley designates by it the entire lobe. 



In the adult cat the vermis is markedly contorted, although regular and symmetrical 

 in the new-born kitten (Wilder, 1 1, PI. I, Fig. 2). 



§ 1334. Other Figures of the Brain of the Cat or other Felidae. — The following 

 list, arranged alphabetically according to the names of the authors, includes all the works 

 and papers known to us to contain figures of feline brains. Additions and corrections 

 will be thankfully received. The figures represent the cat's brain unless otherwise 

 specified. 



