Feb. 3. 



[ 136 3 

 XXIII. Proceediiigs of Learned Societies. 



ROYAL SOCIETY. 



-THHE reading of Dr. Kidd's paper On the ana- 

 -'■ tomy of the mole-cricket, was concluded ; and a 

 notice read, On the nerves of the human placenta; by Sir 

 E. Home, Bart. V.P.R.S. 



Feb. 10. — A paper was read, entitled Notice of the 7gMa- 

 nodon, a fossil herbivorous reptile found in the sandstone of 

 Tilgate Forest; by Gideon Mantell, F.L.S. Communicated 

 by Davies Gilbert, Esq. V.P.R.S. 



Feb. 1 7. — A paper was read, entitled An experimental in- 

 quiry into the nature of the radiant heating effects from ter- 

 restrial sources; by the Rev. B. Powell, M.A. F.R.S. 



Feb. 24. — Dr. John Thomson, F.R.S., communicated a 

 paper, On the materno-fcetal circulation, by David Williams, 

 M.D. ; part of which was read, and the remainder postponed 

 to the next meeting. ■ 



LINN.EAN SOCIETY. 



Feb. 1. — A paper was read, On the structure of the tarsus 

 in the tetramerous and trimerous Coleoptera of the French en- 

 tomologists. By W. S. MacLeay, Esq. A.M. F.L.S. 



It is the object of this communication to show that all 

 Coleoptera are typically pentamerous; that the tarsal system 

 not only violates many obvious relations both of affinity and 

 analogy, but is not even founded in truth ; the majority of 

 insects classed as tetramerous having in reality not Jour but 

 Jive joints: as for instance, the Linnaean genera Curculio, Ce- 

 rambyx, and Chrysomela. It is also shown that all the trimerous 

 insects of the French entomologists are at least tetramerous. 



Feb. 15. — A collection of New Holland birds was exhibited, 

 presented by Mr. Icely. 



M. C. S. Kunth, of Berlin, and Professor Fr. A. Bonelli, of 

 Turin, were severally proposed as candidates to fill a vacancy 

 which had occurred among the foreign members. 



The reading of Messrs. Sheppard and Whitear's paper On 

 the birds of Norfolk and Suffolk, and of Dr. Hamilton's 

 Commentary on the Ho7-tus Malabaricus, was continued. 



GEOLOGICAL SOCIETY. 



Jan. 21. — A paper was read, entitled On the Fresh-water 

 formations recently discovered in the environs of Sete (Cette), 

 at a short distance from the Mediterranean, and below the 

 level of that sea ; by M. Marcel de Serres, Prof, of Min. 

 and Geo), to the Facnltv of Sciences of Montpellier. 



. The. 



