398 



Nofes afid Commcnis. 



METHODS, RIGHT AND WRONG. 



* On the other hand, no condemnation is too strong for the 

 palaeontologist who wilfully ignores the teaching of the morph- 

 ologist, and persists in classing together convergence forms, 

 well known at the present day [e.g., Dreissensia and Septifer), 

 that have no natural relationship. Such only do harm to the 

 science by retarding its progress, and it must be regretfully 

 added that in this they are only too frequently assisted by some 

 students of recent forms, who occupy themselves exclusively 

 in compiling faunal lists on antiquated lines.' 



AN ALBINO SLUG. 



The October Journal of Conchology is an exceptionally 

 interesting number, largely devoted to Lancashire, the papers 



Photo by] Arion ater \ar. alba. [G. A. Booth. 



having reference to that county being a lengthy list of ' The 

 Land and Fresh-water Mollusca of Grange-over-Sands,' by 

 Harry Beeston ; ' Vertigo alpestris in N. Lanes, and West- 

 morland,' by J. D. Dean and C. E. Y. Kendall ; ' Vertigo 

 antivertigo in the Silverdale district,' ' Bibliography of the 

 Non-Marine Mollusca of Lancashire,' and ' Report of the 

 Grange Ramble,' by J. W. Jackson. Mr. Beeston 's paper is 

 illustrated by a block from an excellent photograph of Arion 

 ater var. alha L., which we are kindly permitted to reproduce. 



Naturalist, 



