326 Proceedings of the Royal Physical Society. 
than the lower lid, so that by irritation of the sympathetic 
the latter is drawn back in a more marked manner than the 
former. Narrowing of the palpebral fissure, after section of 
the cervical sympathetic, depends upon relaxation of these 
muscles. Yet recession of the eye-ball may depend upon 
relaxation of the orbital muscle. Miiller, then, concludes 
that the movements occasioned by experimenting on the 
cervical sympathetic are not such as to entitle us to infer 
an influence of that nerve upon voluntary striped muscles. 
He also considers that the movements about the nose and 
mouth, said by Bernard to be produced by section of the 
sympathetic, if they do take place, are owing to the presence 
of unstriped cutaneous muscles. 
Miiller next inquires into the existence of unstriped 
muscles in the skin of the ear. He has occasionally found, 
on galvanizing the cervical sympathetic in cats, that a move- 
ment of the hairs growing upon the skin at the entrance of 
the concha has taken place. This experiment has, how- 
ever, frequently failed both in cats and other animals. A 
careful examination of the skin of the part did not give any 
indications of unstriped muscles, but very distinct muscles 
were seen connected to the hair follicles. He considers 
these experiments of interest, as they appear to indicate 
whence the muscles of the hair follicles receive their nerves. 
Owing to the movement of the hairs being limited to a very 
small locality, during the irritation of the sympathetic, one 
must suppose that only a very small part of the unstriped 
muscular apparatus of the skin of the cat can be regulated 
by the cervical sympathetic. 
Notes on the Occurrence of the Musculus Kerato-cricoideus. 
— In a paper, entitled " Eemarks on the Musculus Kerato- 
cricoideus (Merkel's Muscle)," read to this Society in Janu- 
ary 1860 (see Proc, vol. ii. part 1, page 135), I directed 
attention to an account which had been given by Dr Carl 
Merkel of Leipsic (Stimm und Sprach-Organ, 1857), of a 
hitherto undescribed muscle of the human larynx. Merkel 
described this muscle as arising from the posterior surface 
of the cricoid cartilage, and extending obliquely upwards 
