1867.] 



Mr. Callender on the Thyroid Body. 



183 



The following Table shows the progress and present state of the Society 

 with respect to the number of Fellows : — 





Patron 



and 

 Royal. 



Foreign. 



Cora- 

 pounders. 



£2 12s. 

 annually. 



.£4 

 annually. 



Total. 



November 30, 1866. 



5 



49 



302 



3 



267 



626 



Since elected 







+ 6 





+ 10 



-f-16 



Since compounded. . 











— 2 





Since deceased .... 





-1 



-12 



-1 



— 11 



-2.5 



November 30, 1867. 



5 



48 



298 



2 



264 



617 



Observations on the Anatomy of the Thyroid Body in Man.^^ By 

 George W. Callender, Lecturer on Anatomy at St. Bartho- 

 lomew's Hospital. Communicated by James Paget, Esq. Re- 

 ceived June 8, 1867*. 



By examination of the thyroid body in the foetus, we learn that it has 

 from an early period, much the same relations and appearances as belong 

 to it in childhood, and during the adult condition, and we observe those 

 diversities of its parts which are exceptionally recognized during the later 

 periods of life. We may thus trace out the origin of such exceptional 

 conditions, and notice, more especially, how the isthmus of Eustachius 

 and the pyramid of Lalouette are connected with the formation of the 

 thyroid, and depend for their after characters upon early changes during 

 development of size. 



As I have reason to believe that the formation of the thyroid in man 

 may be fairly reexamined, I shall venture to refer, in the first place, to 

 some of the opinions advanced with regard to its earhest appearances. 



The late Mr. Grayf has alluded to the views of Huschke, Arnold, Bis- 

 choff, and Goodsir, respecting the development of this body. It is enough 

 for my present purpose to state that Arnold considered the thyroid to be 

 developed from the membranous air-tube, where the larynx is formed, 

 whilst Goodsir t thought that it originated in that portion of the mem- 

 brana intermedia of Reichert which remains in connexion with the anas- 

 tomosing vessels between the first and second aortic arches, or carotid and 



* Eead June 20, 1867 : see abstract, p. 24. 

 t Philosophical Transactions, 1852. 

 I Philosophical Transactions, 1846. 

 VOL. XVI. R 



