32 Dr Boue's Observations on the 



Hinter Laussa, Launz, &c., they would not have written that 

 " zae had no right to transport the reader over 150 miles of 

 alpine limestone y and then to assert, that at Grunhach^ Piesting\ 

 4-c., the same deposite as tliat at Gossau contains belemnites 

 and certain other secondary fossils!''' — (P. 111.) 



When we find again at Griinbach, at Piesting, Sec, the same 

 rocks as at Gossau ; when we see these rocks in a similar posi- 

 tion ; and when three geologists recognise in these beds a great 

 many of the same fossils as at Gossau ; does it not seem that we 

 have a right to speak of that deposite when we are endeavouring 

 to classify the problematic deposite of Gossau ? and we ask if it 

 be allowed to say, as those gentlemen do, that such an argument 

 is nothing better than a direct inversion of the rules of induction f 



(p. 111.) 



The hurry of writing is the only excuse we can offer for such 

 an expression of opinion ; for what would our critics say, if we, 

 in their classification of the patches of greensand in the southern 

 parts of England, would deprive them of the liberty of placing 

 under one head all the fossils of the greensand of the Isle of 

 Wight, Dorsetshire, Hampshire, and Kent ? They would cer- 

 tainly consider me a strange logician. Besides, in the case of 

 Griinbach, these gentlemen are the more to blame, as M. KefFer- 

 stein had already, in 1828, in the 5th vol. p. 446, of his Teutchs- 

 land Geognostisch-geologisch dargestellt., well described the loca- 

 lity of the Wand, and had well identified by means of the fos- 

 sils the deposites of Griinbach and Gossau. If we find belem- 

 nites, litulites, anachites, &c., at Grijnbach, it appears to us, 

 after this long discussion, that we should mention the fact, and 

 make use of it to establish more certainly that the Gossau rocks 

 are not tertiary, but secondary. We do not see any thing ex- 

 traordinary in the circumstance, that, in the same formation, 

 some fossils may be awanting in one locality, but present in an- 

 other, as is the case at Sonthhofen and the Kressenberg. The 

 deposite of Gossau also offers similar and striking examples ; 

 thus, at Gossau, there is a pretty large and abundant ampullaria 

 or natica, the place of which at Gams appears to be replaced by 

 a pretty large species of tomatella, and at Wand both fossils oc- 

 cur in great abundance. 



We have now finished our examination of the memoir of Messrs 



