72 NATURAL SCIENCE [July 



research will clearly show that many of the slugs cannot rightly be placed in families 

 by themselves, but will find their true position before or after the genera they have 

 descended from or developed into." 



I would, therefore, include amongst the slugs all forms of Pulmonate molluscs in 

 which the shell is absent, or where, when present, it is incapable of containing the 

 whole of the animal. — Walter E. Collinge. 



BUFFALO v. BISON 



Mr G. H. Carpenter doubtless does well to be shocked ; but the Scientific American 

 you failed to correct has a fellow-sinner in another American, whose claim to the title 

 scientific not even Mr Carpenter would deride. Dr C. Hart Merriam, in Science for 

 May 14 last, writes : " The familiar story of the vanishing buffalo is only one of many." 

 It is to be feared that the influence of Fennimore Cooper is still strong even with the 

 purest of the pure scientific writers. — Buffalo Bill. 



We have received an interesting note from Professor A. S. Packard, in which he 

 refers to our recent articles on the Arthropoda. In his well-known memoir on the brain 

 of Limulus (Mem. Nat. Acad. Sciences, vol. vi., 1893) he has already pointed out that 

 there are four lines of descent among these animals. Hence he considers the group to 

 be polyphyletic. He now writes : — "I do not believe the Crustacea and Trilobites had 

 a common ancestry. I think they evolved from separate vermian ancestors." 



Our remarks on the so-called shooting of the golden eagle in Yorkshire have also 

 brought us communications from Mr Ernest Bell and Mr G. W. Murdoch. The 

 former urges the necessity of more stringent laws for the preservation of the rare British 

 birds ; the latter takes a more hopeful view of the case. It appears that Mr F. Boyes. 

 of Beverley, a thoroughly competent ornithologist, has personally investigated the 

 incident referred to in Mr Joseph Collinson's letter last May {Nat. Science, vol. x., p. 

 303), and finds that the bird in question was not an eagle of any kind, but a young 

 rough-legged buzzard. Mr Murdoch adds : — " I can bear out Mr Southwell's statement 

 (Nat. Science, vol. x., p. 432) that the golden eagle is in no danger of extermination in 

 this country." 



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