Botany and Zoology. 139 
make certain emendations, but also to insert four or five pages of errata, 
correcting typographical errors, perhaps a tithe of those contained in the 
volume. This remark does not at all militate against the statement that 
in this volume “ there are fewer errors than is usual in similar government 
publications.” We are satisfied of the truth of this. The mass of scientific 
per, Ur. i % 
Suckley; on the Reptiles, by Dr. Cooper; on the Fishes by Dr. Suckley ; 
. Cooper, Esq. (a veteran naturalist whom we 
ste will doubtless be taken up at once, to complete the sets of the Pa- 
cific Railroad Reports A. 6. 
- Potamogeton crispus L. was introduced into the North American 
flora by Pursh, and said to occur from “Canada to Virginia.” Dr. Tor- 
ight this country, and not having ourselves met with it, 
the species was excluded from the Manual of the Botany of the Northern 
United St a remark was added in the second edition of this 
this Species has for many years been rowing in a pool in the Botanic 
Garden at Cambridge,—where in fact it cannot be got rid of,—and there 
