On the Musculus Kerato-cricoideus. 



327 



and outwards to be attached to the posterior margin of the 

 inferior horn of the thyroid cartilage. He stated that the 

 muscle was not found in every larynx, and that when pre- 

 sent it existed only on one side. 



In my remarks, I supplemented the description of Merkel 

 with some additional particulars, more especially pointing 

 out, that, although, as a rule, the muscle only occurred on 

 one side, right or left, as the case might be, yet that a double 

 muscle might exist. I figured an example of such a bilateral 

 muscle, which at that time was the only one I had seen. 

 Since then I have met with two additional cases in which a 

 double kerato-cricoid muscle was present. One of these was 

 especially note-worthy, for the muscle, on both sides, was 

 more largely developed than in any previous example that 

 had fallen under my notice. The great size of the kerato- 

 cricoid muscle was combined with a general laryngeal mus- 

 cularity. The occurrence of three examples of a double 

 kerato-cricoid muscle, during the last two years, within my 

 own experience, shows that the bilateral arrangements is 

 not so unusual as was in the first instance supposed.* 



Wednesday, 22d January 1862. — James M'Bain, M.D., R.N., 

 President, in the Chair. 

 The following gentlemen were elected Members of the Society : — 



Edward Hargitt, Esq., an Ordinary Member; and the Rev. William 

 Csesar, Minister of the parish of Tranent, and Daniel Manson Logan, 

 Esq., Seafield Lodge, Leith, as non-resident Members. 



The following Donations to the Library were laid on the table, and 

 thanks voted to the donors : — - 



1. Report of the United States Commissioner of Patents, 1859. 

 Mechanics, Vols. I. and II. — From United States Patent Office. 2, 

 (1.) Annual Report of the Board of Regents of the Smithsonian Insti- 

 tution for the year 1859. Washington, 1860. (2.) Smithsonian Con- 

 tributions to Knowledge : — Astronomical Observations in the Arctic 

 Seas, by Elisha Kent Kane, M.D., U.S.N., Washington, May 1860; 

 Tidal Observations in the Arctic Seas, by Elisha Kent Kane, M.D., 

 October 1860. — From the Smithsonian Institution, U.S.A. 3. (1.) 

 Notice of the Indians seen by the Exploring Expedition under the Com- 



* Since the above was written, a specimen of a symmetrical kerato-cricoid 

 has been sent me by Mr H. P. Mallam, who found it in a subject in the dis- 

 secting-room of Charing-Cross Hospital. 



VOL. II. 2 u 



