PROFESSOR TIEDEMANN ON THE BRAIN OF THE NEGRO. 
513 
teriorly, by the longitudinal fissure, into two equal parts. On both sides are situated 
the lateral longitudinal fissures which divide the spinal marrow into a posterior and 
anterior part. From these cords the posterior and anterior roots of the spinal nerves 
take their origin. 
On the fore part of the medulla oblongata are the two corpora pyramidalia, and 
on the outside of these the corpora olivaria. On the posterior surface are the corpora 
restiformia, entering the cerebellum. Between them is the fourth ventricle (vent.ri- 
culus quartus, calamus scriptorius,) and the strise medullares. The following are the 
dimensions according to the old measurement of the Parisian Academy. 
The medulla oblongata and the spinal cord from the pons Varolii to the end of the 
latter, measure 14 inches 11 lines. The breadth of the medulla oblongata below 
the pons Varolii is 10 inches 4 line ; the breadth of the medulla oblongata at the part 
where the corpora pyramidalia cross each other, 5-f- lines. The breadth of the spinal 
cord on the vertebrae cervicales superiores was 54 lines ; on the vertebrae cervicales 
inferiores 6-§- lines ; on the middle pectoral vertebrae, 44 lines ; on the inferior pec- 
toral vertebrae 54 lines. 
In order to compare the spinal cord of the Negro with that of the European, I 
measured it in a man 5 feet 8 inches high, and in a woman 5 feet high. 
Man. Woman, 
in. lines. in. lines. 
Length of the medulla oblongata and of the spinal cord . . 17 3 14 10 
Breadth of the medulla oblongata below the pons Varolii . 11 IO4 
Breadth of the medulla oblongata at the part where the cor- 
pora pyramidalia cross each other 64 54 
Breadth of the spinal cord on the vertebrae cervicales superiores 5-4 5 
Breadth of the spinal cord on the vertebrae cervicales inferiores 64 64 
Breadth of the spinal cord on the middle pectoral vertebrae . 5 44 
Breadth of the spinal cord on the inferior pectoral vertebrae 5-f- 54 
Hence there is no remarkable difference between the medulla oblongata and spinal 
cord of the Negro and that of the European, except the difference arising from the 
different size of the body. 
Cerebellum of the Negro. 
The cerebellum of the Negro, in regard to its outward form, fissures and lobes, is 
exactly similar to that of the European, as is shown in Plate XXXII. h. k. and 
tria craniorum preestantissimam exhibent seriem, maxime si cum tribus istis /Ethiopum craniis comparantur, 
quae priore Decade exbibui, utpote quae luculenter demonstrant, genuinos yEthiopes, si craniorum formam 
spectes, non minus certe, imo vero magis passim inter se ipsos ab invicem differre, quam nonnulli eorum a 
multorum Europaeorum capitis forma differunt.” 
3 u 
MDCCCXXXVI. 
