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Show 76 ON SUPERNUMERARY BONES IN THE SKULLS OF MAMMALS. [Feb. 7, the brain illustrated in fig. 1 (p. 66) does away with this supposition, since the fissure which evidently corresponds to F.p.i. of fig. 6 is clearly continuous with and a part of the sulcus frontalis superior. Literature. (1) D E N L K E R , J.-" Recherches anatomiques et embryologiques sur les Singes anthropoides." Arch, de Zool. Exp. (2)iii. bis, 1885. (2) v. B I S C H O F F . - " Ueber das Gehirn eines Gorilla, &c." SB. Akad. Miincheii, vii. (1877) p. 96. (3) BROCA.-"Etude surle Cerveaudu Gorille." Rev. d'Anthrop. (2) i. 1878, p. 108. (4) OWEN.-Trans. Zool. Soc. vol. v. p. 207. (5) GRATIOLET.-Comptes Rendus, 1860, p. 801. (6) v. BISCHOFF, in Morph. JB. 1878, p. 59. (7) v. B I S C H O F F . - " Die Mitte oder untere Hirnwindung . . . des Gorilla." Morph. JB. 1882, p. 312. (8) C H A P M A N . - " Observations upon the Brain of the Gorilla." Proc. Acad. Nat. Sci. Philad. 1892, p. 203. (9) PANSCH.-"Ueber die Furchen und Windungen am Gehirn eines Gorilla." Abhandl. Geb. Nat. Hamb. 1876. (10) P A N S C H . - " Einige Bemerkungen fiber den Gorilla und sein Hirn." Schr. nat. Ver. Schlesw.-Holstein, 1878, p. 127. (11) T H A N E , in 'Nature,' xv. p. 142. (12) M O E L L E R . - ' Beitriige zur Kenntniss des Anthropoid-Gehirns.' Berlin, 1891. (13) K E I T H , in ' Natural Science,' ix. p. 26. (14) C U N N I N G H A M . - " Contribution to the surface Anatomy of the Cerebral Hemispheres." Cunningham Memoirs, Roy. Irish Acad. 1892. (15) B E N H A M . - " A Description of the Cerebral Convolutions, &c." Quart. Journ. Micr. Sci. xxxvii. p. 47. (16) B E D D A R D . - " Contributions to the Anatomy of the Anthropoid Apes." Trans. Zool. Soc. xiii. p. 177. 2. Note on the Presence of Supernumerary Bones occupying the Place of Prefrontals in the Skulls of certain Mammals. By ROBERT O. CUNNINGHAM, M.D., D.Sc, F.L.S., F.G.S., C.M.Z.S., Professor of Natural History, Queen's College, Belfast. [Received November 21, 1898.] About two years ago l I addressed a brief communication to the Zoological Society on the occurrence of a pair of small bones in the skull of a Lemur, occupying a corresponding position to the prefrontals of a Reptile. In that paper I referred to similar bones having been previously recorded in the skull of a Hippopotamus. 1 Cf. P. Z. S. 1896, p. 99G. |
