(Paris, Mallet-Bachelier,1854). 4to. No wrappers. In: ""Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences"", Tome 39, No 6. Pp. (265-) 300 (entire issue offered). Gratiolet's paper: pp. 274-278. A few faint marginal brownspots.
First printing of this landmark paper in neuroscience in which Gratiolet for the first time traces visual radiation from thalamus to occipital cortex and describes convolutions of the cerebral cortex.