EXAMINATION OF SOME SPINAL NERVES 169 
for human anatomy a service that has been long wanted and wanting. Had such work existed at 
the time my researches were made, it would have rendered mine the utmost assistance. As it 
is, it gives me gratification to find our independently-attained results, reached by such different 
methods of inquiry, are as generally harmonious as they appear to be. Professor Bolk's work 
strengthens my view, expressed at the end of Section I of this paper, pp. 86, 87, that the fore-limb 
of Man is segmentally prefixed as compared zvith that of Macacus and of the other animal species 
enumerated. My researches commenced from the caudal end of the body and went headwards ; 
Professor Bolk, conversely, has commenced with the top of the cervical region, and is working 
downwards. Hence the final part of my research and the beginning part of his overlap. As the 
mutual value of each is partly due to its independence of the other, I may perhaps state that my 
delimitations of the skin-fields of the cranio-spinal nerves of head, neck, and arm were in a series of 
photographs demonstrated by me to the Neurological Society of London, Feb. 9th, 1893 (see 
' Proc. Neurol. Soc.,' p. 23, 'Brain,' Spring number, 1894), and that some figures of the same 
from my photographs appeared in illustration of my friend Dr. Henry Head's second paper on 
Sensory Disturbances, especially in reference to Visceral Disease, published in 'Brain,' 1895. 
But Professor Bolk's work has been altogether independent of these partial publications of mine. 
In his papers we have the best and first really adequate study of the segmental morphology of the 
human limbs. 
Section IV of the foregoing communication formed the material of the Croonian Lecture 
on 'The Mammalian Spinal Cord as an Organ of Reflex Action,' which I delivered before the 
Society, April i, 1897.] 
Bibliographical References 
P. Albrecht. Beitr. z. Morphol. d. Mus. omo-hyoideus. Kiel, 1876. 
H. C. Bastian. Quain's Dictionary of Medicine. 1882. 
Paralyses, Cerebral, Bulbar, and Spinal. London, 1886. 
Medico-Chirurgical Society's Transacts. London, 1890. 
BowLBY. Medico-Chirurgical Society's Transacts. London, 1890. 
W. Beck. Ueber den Austritt des N. hypoglossus und N. cervicalis primus aus dem Central- 
organ. Anat. Hefte, 18. 
J. F. v. Bemmelen. Ueber die Herkunft der Extremitaten - und Zungen - Muskulatur bei 
Eidechsen. Anat. Anzeig., 4. 
L. Bolk. Rekonstruktion der Segmentirung der Gliedmassen-Muskulatur. Morphol. Jahrb., 
vol. 22. 
E. R. BoYER. Beziehungen zwischen Skelet, Muskulatur u. Nerven der Extremitat. Morphol. 
Jahrb., vol. 21. 
The Mesoderm in Teleosts ; especially its share in the Formation of the Pectoral Fin. 
Bull, of the Museum of Zoology, Harvard, vol. 23, No. 2, 1892. 
P. Bert et A. Marcacci. Communicazione preventiva sulla distribuzione delle Radici Motrici 
nei Muscoli degli arti. Lo Sperimentali, fasc. 10, 1881. 
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