216 NATURAL SCIENCE. March, 1895. 



mischief of separating fossil and recent forms into two entirely different categories 

 under different care and custody, and named and arranged by men differently 

 trained and having a different scheme of nomenclature. This issue I will, however, 

 reserve, merely stating here what is a perfectly well-known fact, namely, that a 

 number of fossil so-called species are as much entitled to the distinction as are the 

 mummified Pharaohs of ancient Egypt. A mummy, no doubt, looks very different 

 to a " nice fresh corpse," as a humorist once remarked, and a periwinkle in Clare 

 Market looks different to one from the Crag, but it does not follow that in either 

 case we should have a different name for the two forms. When a sweep is washed 

 he may still be a sweep, and it is best to call him so. 



Henry H. Howorth. 

 P.S. — I am pleased to have just received a letter from Senor Herrera, of the 

 National Museum in Mexico, ardently supporting the position I have taken. 



H. H. H. 



Errata. 



This volume, p. 142, line 4 : for " Watken," read " Wathen." 



Page 139: Mr. J. E. Duerden was never Assistant in the Museum of Science 



and Art at Dublin, but Demonstrator in Biology and Palaeontology at the Royal 



College of Science there. 



Page 76 : Mr. G. F. Harris desires us to state that the comparison of a silicious 



sphere from the Yellowstone to Parkeria was not made by him, as might be inferred 



from our editorial note. 



WANTED. 



The following numbers of Natural Science : No. 1, March, 1892; 

 No. 8, October, 1892 ; No. 11, January, 1893 i No. 12, February, 1893 » 

 No. 23, January, 1894. The Publishers are prepared to give half-a-crown 

 apiece for clean copies of the above-named numbers until further notice. 



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