ILLUSTRATED CATALOGUE OF BRITISH FOSSILS. 



Four plates, B 1, C 1, 2, 3, are issued with this number of this Catalogue : the 

 letter-press to accompany the plates will not be issued until a whole Section or 

 Group of Fossils is completed. For instance, no descriptive matter of the 

 Amorphozoa will be issued until that great division is completely illustrated. 



The order of selection will not be continuous; that is, it will not begin with the 

 lowest, and go on successively to the highest classes, nor, vice versa, from the 

 highest and go down to the lowest ; but such groups will be taken as can be 

 most completely done, or as from the existing state of scientific literature it may 

 be deemed most adviseable to do on account of utility. Every group commenced 

 will be forthwith carried on to conclusion ; and it will be so arranged that the 

 Volumes of the Catalogue will be complete in themselves, and separate covers 

 will be issued for binding. The Plates will be issued in the Supplements, and 

 their numbers will be alphabetically by letters and by figures, so that additions of 

 new species or genera can at any time, even in future years, be made without 

 destroying the proper continuity of the work. For instance, for all the genera 

 of Amorphozoa beginning with A, the plates will be numbered Al, A2, A3, &c. y 

 and if at any future time additions are made, the plates illustrating those will be 

 numbered Al*, A2*, and so on. When a full group is completed, the part of the 

 catalogue containing it may be purchased separately ; but the price of all these 

 parts will be slightly higher, in the proportion of 10s. to 7s. 6d., than the cost of 

 the extra supplements containing the figures issued with "The Geologist." 



NOTICE TO SUBSCRIBERS, 



In consequence of the int ended issue of Supplements to complete the entire group 

 of Amorphozoa in this volume, the subscriptions for the half-year terminating in 

 December next, have been raised to 7s. 6d, which will include all Supplements and 

 extra matter which will be published. The numbers with the supplements will 

 be sold at Is. 6d.; but the Trade can subscribe upon the usual terms. All 

 subscriptions must he paid, in advance, or the full price will be charged on all 

 accounts booked. 



The subscriptions for the ensuing half-year are now due. The subscription, 

 7 s. 6d., can be remitted in stamps, or by a Post Office ordsr on the Strand Post 

 Office, payable to Samuel J. Mackie. 



Geologist Office, Editor and Proprietor. 



25, Goldmen-square. Uegent-sfoeet. 



# # # The paging of the " Supplement" runs on continuously with the paging 

 of the magazine ; the only distintion of the " Supplement" being an indication 

 at the foot of the first page, as at page 265, No. 42. 



CORRESPONDENTS. 



W. Pengelly, Esq., Lamorna; J. Mushen, Esq., Birmingham; 

 H. C. Salmon, Esq., Truro ; F. Drake, Esq., Leicester ; C. C. 

 Blake, Esq., Brunswick Square. 



BOOKS, ETC., RECEIVED. 



" Memoir of Edward Forbes," F.R.S. By George Wilson M.D., 

 F.R.S.E., and Archibald Gerkie, F.B.S.E., F.G.S. Cambridge and 

 London : Macmillan & Co. Edinburgh : Edmonston & Douglas. 

 1861. 6 



