ADVERTISEMENTS. 



3 



NOTICE TO SUBSCRIBERS. 



We again issue a supplement with this number, our object being to find space 

 for valuable matter in hand, as wel as to increase the character and reputation of 

 the magazine to the utmost of our ability, by giving the earliest and fullest 

 reports of axl that is progressing in geology. As we are tenacious, however, of 

 keeping the magazine to its original price of one shilling, we ask our readers and 

 subscribers to use then' endeavours among their friends to extend the circulation 

 sufficiently to enable us to give the quantity now issued at the original price. If 

 each of our present subscribers could add an additional purchaser, we could at 

 once effect this object. 



The thickness of some of the magazines of light literature contrasts forcibly 

 with the much smaller dimensions of scientific periodicals ; but the necessary 

 difference between the number of general and the number of special readers 

 will at once account for this fact. By the use of small type we present to our 

 readers monthly a very large mass of matter ; but, notwithstanding, a still larger 

 quantity than we are able to print is constantly left over, not unfrequently from 

 month to month, and compels us now to have recourse to supplements. We desire, 

 also, to increase the number of illustrations, and we trust that all who disapprove 

 of the additional trifling expense thus temporarily incurred will communicate 

 their views and objections to us without reserve or delay. We desire it, more- 

 over, to be understood that our wish is to make the issue of occasional supple- 

 ments only the preliminary movement to the permanent enlargement of the 

 magazine to its present size of sixty-four pages — an unexempled cheapness for a 

 first-class scientific publication. 



# * # Plate I. to illustrate the note on Chitonidae, and Plate II. to accompany 

 Mr. Moore's article on Brachiopoda, will be given with the next number. 



PRACTICAL GEOLOGY. — King's College, London. — Professor Tennant, 

 F.G.S., will give a course of Lectures on Geology, having especial reference to 

 the Application of the Science to Engineering, Mining, Archetecture, and Agriculture. 

 The Lectures will commence on Friday Morning, April 12th, at Nine o' Clock. 

 They will be continued on each succeeding Wednesday and Friday, at the same 

 hour. Fee, £1 lis. 6d. R. W. Jelf, D.D., Principal. 



ISLE OF WIGHT FOSSILS. 



H KEEPING can furnish small or large Collections of FOSSILS from the 

 • Hempstead, Bembridge, and Headon Series, and Barton Clay of the Isle 

 of Wight, Bracklesham Sands of Bramshaw, and Barton Clay of Barton, at Id. 

 and upwards per specimen, lists of which can be sent on application. 



The specimens are all collected by himself, and are kept carefully separate. 

 Satisfactory references can be given to several well-known Geologists by whom 

 he has been employed during many years. 



H. K. also acts as a guide to the different geological localities. 



Stroud Place, Freshwater, Isle of Wight, 



NOW READY. 



EXPLANATION OF DIAGRAM 



No. VI. 



FLINT IMPLEMENTS FROM 

 THE DRIFT. 



PRICE SIXPENCE. 

 London : " Geologist, " Office, 25, Golden Square, Regent Street, W., and of all 



Booksellers. 



