138 Li/uueuu SiH-'wltj. 



day 1 llh of February, and continued on each succeeding Tues- 

 day. 



On the Scientific Principles of Arithmetic (cor.siueved as a 

 branch of Mathematics) and the Elements of Algebra. By 

 John Walker, Esq. formerly Fellow of Trinity College, Dublin, 

 and M.R.I.A. Commencing on Wednesday the 12th of Fe- 

 bruary, and continued on each succeeding Wednesday. 



On Music. By W. Crotch, Mus. D. Professor of Music in 

 the University of Oxford. To commence after Easter. 



A Syllabus of each of the Courses may be obtained at the 

 Royal Institution. 



We are happy to observe that the Great Lecture Room 

 has been most successfully heated by one of Mr. Perkin's new 

 invented hot air stoves, and that the Lectures ai'e very well 

 attended. 



LIN'NiEAN SOCIETY. 



Feb. 4-. The foUov/ing communications were read : 



A Continuation of Dr. W. Jack's Paper on Lansinm and 

 other Malayan Plants. 



The following were the species noticed : 



Pierardia dulcis. — Lmconotis anceps (TetrandriaMonogynia 

 — Apocineoe). — Myrmecodia* tuberosa (Tetrandria Monogy- 

 nia — Rubiacea;). — Hydnophijtian formicarum (Rubiaceae). — 

 Lasiauthus cijanocai-jms (Rubiacese). — Helbsjjora Jlavescens 

 (Rubiaceee). — Glaphyra* nitida (Icosandria Monogynia — 

 My rtaceae. ) — Glaphyra sericea. 



Catalogue of the Land and Fresh-water Shells found in the 

 County of Suffolk; by the Rev. Revett Sheppard, F.L.S. 



The Habitats of these shells for the midland and western coun- 

 ties having been given by Dr. Maton and Mr. Rackett vol. viii., 

 the present paper is to supply those of Suffolk and Essex. 

 Linnaeus's arrangement is followed, the author being of opi- 

 nion that all these shells are reducible to his genera: at the 

 same time he highly commends M, Draparnaud, considering 

 his genera as excellent subdivisions of the Linna?an ones. 



Feb. 18. The following Papers by Major-General Hard- 

 wicke, F.R.S. & L.S., were read: 



Description of the Sciio-us Sagitia, with a Figure. — Ac- 

 count of the Buceros galeatus of Shaw, with two Figures. — 

 Description of a new Species of Phasiamis, with Figures of 



* The names Mt/rmecodia and Glaphyra are ineligible, inasmucii as they 

 have buen preoccupietl in Entomology hy Latreille, who has the genera Myr- 

 tnecodes and Glapkyrus. — Edit. 



the 



