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.—WaAtrTer E. CoLLINGE. 
BUFFALO v. BISON 
MrG. H. CARPENTER doubiless 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. 8. 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. Murpocu. 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 (Wat. Science, vol. x., p. 
303), and finds that the bird in questiom 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. 482) that the golden eagle is in no danger of extermination in 
this country.” 
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