MUSSELS OF CUMBERLAND EIVER AND TRIBUTARIES. 



]3 



Fourth Section, Dover to the Ohio River. 



Mussel Shoals was the lowest point visited on the river, but from 

 reports given by the clammers the niggerhead continues to be the 

 prominent shell down to the mouth of the river. 



The number of beds in this section of the river is fully equal to 

 that of the preceding section, but they have not been worked as much 

 because they are farther away from the center of demand and require 

 transportation up the river to Clarksville. The niggerhead gains 

 steadily in its percentage and at Canton passes the pigtoe, and then 

 continues to increase down to the mouth of the river. There is also 

 a steady decrease in the amount of culls, until at and below Canton 

 nearly all the shells obtained were marketable. Of course, this 

 means much to the clammer, as it does away with the necessity of 

 sorting the shells and handling OTcr the culls. 



TABULAR STATEMENT OF DISTRIBUTION OF SPECIES. 



In the table herewith given is expressed the distribution of every 

 species of mussels obtained by the party in the Cumberland River 

 and its tributaries. Wliere the mere presence of a species is all that 

 is desired, it is indicated by an X. The percentages of the more 

 important commercial species are indicated by numbers. The totals 

 represent the actual number of specimens obtained. In order to 

 catch the eye readily, all the side stations not on the main river are 

 printed in italics. All commercial species are marked with an 

 asterisk (*). 



