VI 
CONTENTS. 
Notice of the Discovery of some oew Cystideans from the ^ 
Wenlock Shale near Walsall. . . | 
: on the Occurrence of Marine Plants in Worcestershire. I 
Mr. Frederick A. Cabrington on Geographical Maps and Models...... I 
Mr. W. J. Hamii.ton on Profewor'a Savi's Work on the PhaerioraeDS obserrnl 
during the Karthquakes in Tuscany in August 1846. ■ 
Marchione.‘«8 of Hastings on the Freshwater Eocene Beds of the Hordle Clif, 
Hants.... . • 
Rev. J, S. Henslow on Detritus derived from the London Clay and depo»ited 
in the Red Crag... . * 
Dr. Jambs I.nqus on a new Species of Nautilus from the FJalifax Coal Bedi™ • 
Mr. Frederick M'Coy on the Plants of the New South Wales and Van Ok- 
men s Land Coal-fields. * 
Sir R. I. Morchiso.v on Count Keyaerling’s Geology of the North-easUn 
extremity of Russia in Bluropc....... . * 
Professor Owen on the Fossils obtained by the Marchioness of Hastings fro* 
the Freshwater Eocene Beds of the Hordle Cliffs. * 
Prof. Boqusuiwski on the Fonnation of Coal, See .. * 
Prof. A. C. IIamsav on the Origin of the existing Physical Outline of a portif* 
of Cardiganshire... ■ 
Count Anoi.riiB De Rosen on Mapsof Sweden..... ^ 
Mr. J. W. Salter on a System of Colour for all Creological Maps... 
Sir RoitEBT H. SciioMBUROK ou the Geological Structure of Barbados, and M ^ 
Lhrenberg’s Polycystina, a new section of Animalcules from Barbados. . ^ 
Mr. E. VivjA.N on the Phajnomena of Kent’s Cavern. ' 
0 ZOOLOGY. 
Mr. JosmjA Alder on the Animal of Lepton Squamomtm ... 
Messrs. J. Alder and A. Hancock’s Notes on British Mollusca. withdescrip* 
tions of new Species. .j 
Professor Allman on the Structure of the Larva of certain . . .j 
■ -OQ the Locomotive Larva of Plumatella . .. 
~ ■ • on the Development of Notodelphijs (Allra.), a new Genus o 
LntomoHlraca ... . 
Dr. Bajiid on the Genera Nebalia (Leach), Chirocephalui (Prevost), and Bmo- 
ahijitiji (Schajffer).... "I 
Mr. .lonv Blackwall’s List of Periodical Birds observed in the ^eaf^ 
and 1847 near Llanrwst, Denbighshire, North Wales. 
Professor E. Forrrs on the Families of British Lainellibranchiate 
—'s Notice of Dredgmg Researches in progress.. •; 
Messrs. Alranv Hancock and Dr. Embleton on the Anatomy of - 
Prof. V an dec Hoven on the Structure of Nautitus . .. 75 
Dr. A. G. Melville on the Lepidosiren ..... U 
Mr. C. W. Peacu’s Notice of Additions to the Cornish Fauna .. ^ 
Professor Nil.sson on Changes in the Fauna of Sweden. the 
® Rcuds of a Paper on the Distribution of Population i® ^ 
(.ununc Chersonese... <d 
Mr. William Thompson’s Additions to the Fauna of Ireland .. s) 
r. J. O. Westwood on certain Blind Species of Insects. 
bota.nv. 
in the Structure of the Stomata of Cerale^ 
