f\XPLANATION OF PLATE XI. 



Fig. 22. — Limestone cliff.s and mussel bed at the foot above Dixon 

 Falls, Platte River. Abundance of lime in the water here contributes to 

 the unusual growth of shell. 



Fig. 23. — "Fishing" for mussels in the West Bayou of Lake Contrary 

 St. Joseph. A garden rake is used in deep water, but hand, picking, where- 

 ever possible, is the most successful. 



