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XVIII.—The Morphology of the Prosencephalon of Spinax as a type of Elasmobranch Fore-brain.
Published online by Cambridge University Press: 06 July 2012
Extract
This investigation on the morphology of the Fore-brain or Prosencephalon of Elasmobranchii was suggested to me by Professor G. Elliot Smith, F.R.S., and I am indebted to him for introducing me to an interesting if somewhat difficult and perplexing subject. A glance at the literature on the morphology of the prosencephalon will readily convince one of two things—firstly, of the endless field for work in endeavouring to ascertain the true homologies of the neurone areas and fibre tracts in the brain throughout the Phylum Vertebrata; and secondly, of the somewhat unnecessary obstacles which have been introduced into the problem by the more recent additions to a terminology, already overburdened and encumbered, of new terms for equivalent parts. It would appear to be very advantageous if mutual agreement could be arrived at among workers on this subject regarding the use of descriptive terms, and, if such is at present impracticable, that each new worker should refrain as far as possible from applying a new term to a structure already previously described. In one case, namely, that of the tuberculum olfactorium, five different terms have apparently been applied to the same area.
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- Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 52 , Issue 2 , 1919 , pp. 487 - 500
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- Copyright © Royal Society of Edinburgh 1919
References
page 488 note * I have also to express my indebtedness to the Royal Society of London for a grant of £10 in aid of the printing of this paper.
page 489 note * Smith, Grafton Elliot, “The Cerebral Cortex of Lepidosiren,” etc., Anatomucher Anzeiger, Bd. xxxiii, Nos. 20 and 21, Jena, 1908.Google Scholar
page 489 note † Smith, Grafton Elliot, “On the Morphology of the Cerebral Commissures in the Vertebrata,” etc., Trans. Linn. Soc. London, Ser. 2, Zoology, vol. viii, 1902, pt. xii.Google Scholar
page 490 note * Johnston, J. B., “The Telencephalon of Selachians,” Journal of Neurology and Psychology, vol. xxi, No. 1, February 1911.Google Scholar
page 490 note † Gaupp, Ecker's and Wiedersheim's Anatomic des Frosches, Braunschweig.
page 494 note * Fig. 8 shows the fibres of the tractus cortico-medialis situated lateral to the fibres of the more medial tractus medianus.
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