NOTICES OF NEW BOOKS. 513 
the Fresh-water Polype (Hydra vulgaris, H. viridis, H. fusca), 
Earthworm, Fresh-water Mussel, and Crayfish being used as 
types. 
An Appendix pertains to ‘‘ General Advice to the Student.” 
The first advice to the student is on ‘“‘the importance of some 
preliminary reading before dissection is undertaken.” Against 
this may be instanced Scudder’s historical narrative of his intro- 
duction to the study of a fish by Agassiz. An axiom, however, 
with which all will agree, which should be pondered by the 
young, and remembered by the old, is to avoid the common and 
easy delusion that one “really wnderstands Some statement, 
because he can remember the words of it.” 
The Wonderful Trout. By J. A. Harviz-Brown. Edinburgh: 
David Douglas. 
“THe Wonderful Trout” of Mr. Harvie-Brown has always 
had admirers ; old Isaac Walton declared “‘ he may be justly said, 
as the old poet said of wine, and we English say of venison, to 
be a generous fish, a fish that is so like the buck that he also has 
his seasons’; while in England at least the Trout stream and 
the cricket field are among our dearest experiences and re- 
miniscences of country life. We quite recently (ante, p. 444) 
noticed another work on the same subject, but that referred 
principally to fish in British streams, while the present small 
volume is all Scotch,—fish, waters, author, publisher. 
When a naturalist like Mr. Harvie-Brown writes on a subject 
of special interest to anglers, the zoologist may safely rely upon 
finding the record of many facts and observations which an 
ordinary fisherman would pass unheeded as almost outside the 
domain of sport. But to catch your fish you must know him, 
his food not alone, but his time and manner of eating it, his 
haunts, his habits, his idiosyncrasies ; in fact, he who knows his 
Trout best should fill the largest basket. Thus we may leave 
the author’s successful advocacy of ‘‘up-stream” angling, and 
the more startling disuse of the landing-net, as solely appertaining 
to the ‘‘gentle craft”; and as the angler fishes the stream for 
Trout, so must we search the book for natural history lore, 
