1895-96.] Mr F. J. Cole on Nerves of Chimmra monstrosa. 49 
The Cranial Nerves of Cliimcera monstrosa . By Frank J. 
Cole, Demonstrator of Zoology, University College, Liverpool. 
Communicated by Professor Ewart, F.R.S. [Preliminary 
Communication. ) 
(Read March 2, 1896.) 
This work was commenced at the suggestion of Prof. Ewart, 
F.R.S., to whose kindness I am indebted for the material used, 
and for much assistance and advice during the progress of the 
investigation. Prof. Ewart placed two specimens at my disposal — 
a male and a female, both of which were about 43 cm. long, 
excluding, of course, the lash. As, however, the male had been 
partly dissected for special points in connection with another 
investigation, it was only available for the study of the IXth and 
Xth cranial nerves ; the main bulk of the present work, therefore, 
having been carried out on a single specimen. Hence there are 
several points on which my work will require confirmation. 
As the dissection of the cranial nerves of Cliimcera elucidated 
facts of a more interesting character than I had anticipated, it was 
thought desirable to publish a preliminary statement containing a 
brief account of the facts, and to leave the full description with 
figures and morphological deductions for a future communication, 
which I hope to lay before the Royal Society in a few weeks’ 
time. The present paper, therefore, pretends to be a brief review 
of the more important facts and nothing more. 
Having nothing new to describe with respect to the olfactory 
and optic nerves, I shall commence with the oculo-motor : — 
Third Nerve . — This is a large nerve, and arises from the crus 
cerebri by two principal roots just behind the pituitary body. On 
emerging from its foramen in the orbit, it immediately gives off a 
branch to the superior rectus muscle of the eye, and divides into 
two large dorsal and ventral branches running respectively over 
and under the optic nerve. The dorsal branch courses straight 
across the orbit and fans out on the internal rectus muscle, whilst 
the ventral, after giving off a branch to the inferior rectus, pursues 
a somewhat similar course and supplies the inferior oblique. The 
ventral division of the Illrd, just after its origin, gives off a fine 
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