ILLUSTRATED CATALOGUE OF BRITISH FOSSILS. 



The order of selection will not be continuous from the lowest to the highest 

 class, nor, vice versa; but such groups will be taken as can be most com- 

 pletely 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 

 beginning with A, the plates will be numbered Al, A2, &c. ; beginning with B, will 

 be < Bl,B2, and so on and if at any future time additions are made, the plates illustrat- 

 ing those will be numbered Al*, A2'*, and so on. When a 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." 



The letter-press to accompany the plates will not be issued until the whole 

 Group of Amorphozoa is completed. 



NOTICE TO SUBSCRIBERS. 



In oonsequence of the issue of Supplements, the subscriptions for the half-year 

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

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

 accounts booked. 



The subscription, 7s. 6d. 3 can be remitted in stamps, or by a Post Office ord?r 

 on the Strand Post Office 3 payable to 



Samuel J, Mackie. 



Geologist Office, Editor and Proprietor. 



25, Golden-square. Regent-street % W, 



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

 of the magazine 5 the only distinction of the " Supplement" being an indication 

 at the foot of its first page, aa at page 265, No. 42. 



CORRESPONDENTS. 



H. Webster, Nottingham ; F, Drake, Esq., Leicester ; J. Kelly, 

 Esq., Dublin; W Peengelly, Esq. , Torquay. 



BOOKS, ETC., RECEIVED. 



" On the Nomenclature of the Foraminifera." By W. K. Parker, 

 U.S. and T. R, Jones, F.G.S. 



" The Laws which regulate the Deposition of Ore in Veins ; il- 

 lustrated by an Examination of the Geological Structure of the 

 Mining Districts of Alston Moor." By W. Wallace. London : 

 Stamford, Charing Cross. 1861. 



Proceedings of the Manchester Geological Society. 



" On some receut modifications of opinion respecting the Origin of 

 Crystalline Rocks, and their bearing on the more important points of 

 Practical and Theoretical Geology." By H. C. Salmon, F.G.S. 

 Truro : Heard and Son. 



" On the Grauwacke Rocks of Ireland, as compared with those of 

 England." By John Kelly, C.E. Dublin. 1861 



Notes on the Cretaceous and Carboniferous Rocks of Texas." By 

 Jule'S Marebti. Boston : Rand and Every. 1861. 



"On the Origin of the so-called ' Crystalloids' of the Chalk." By 

 11. C. Sorby, Esq. 1861. - 



