Ui 



M^inoires de rAcaddmie Iinp6riale des Sciences de Saiiit-rciters- 



bonrg. (Sciences Politiciues, &c.) Tome vi., Livrais. 1-3. 

 Bo. do. do. (Sciences Naturelles). 



Tome v., Livrai& 1. 2. 

 Do. do. do. (Sciences Mathematiques). 



Tome iii, Livrais. 1, 2, 3. 

 Do. do. do. M(^moires pr^sent^s par 



divers Savans. Tome iv., Livrais. 1. 

 Recueil des Actes des S(5ances Publiques vie I'Acad^mielmptSrial e 



des Sciences de Saiut-Petersbourg, tenues le 31 Decembre 



1841, et le 30 Decembre 1842.-2?// the Amdemij. 

 Comptes Rendus Hebdomadaires des Stances de I'Acad^mie des 



Sciences. Tome xvi., No. 9-25, et Tome xvii., Nos. 1-19.— 



By the Academy. 

 Maps of the Irish Ordnance Survey, containing the county of Tip- 



perary, in 93 sheeta— 5^ His Excellency the Lord Lieutenant. 

 Transactions of the Royal L-ish Academy. Vol. xix. Part 2. — 



By the Academy. 



Momlay, ISth December 1843. 



Dr ABEECROMBIE, V.P., in the Chair. 



The following Communications were read : — 



1. A description of Congenital Malformation of the Auricle 

 and External Meatus of both sides in three persons, with 

 Experiments on the state of Hearing in them, and Re- 

 marks on the mode of Hearing by Conduction through 

 the hard parts of the Head in general By Professor 

 Allen Thomson. 



Head ISth December 1843, and 2d January 1844. 



The three persons referred to came accidentally under the obser- 

 vation of the author during the past year. They were from different 

 parts of the country, and not related to one another. In one of 

 them only was it ascertained that other members of the same family 

 had been similarly affected. 



The first part of the paper contained a notice of the history of 

 these persons, and an anatomical description of the malformation 

 with which they were affected. In all the individuals, unsuccessful 

 attempts had been made by dillerent surgeons to uncover a mem- 



