Natural history and propagation of fresh-water mussels . Fig. I.—An undredged portion of the Kankakee River where valuable mussels ^Mi^^ Fig. 2.—A dredged portion of the Kankakee River rendered (temporarily, at leastj unfit for fresh-water mussels. Bull. U. S. B. F., 1919-20. Plate X.

---

Size: 2670px × 936px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1921