Fig. 37. Iiiverlcl)ratc animals from 768 square inches on mud bottom, Habitat 

 No. cxlix, Field No. 1048, water Sj/ feet deep. Mollusks are here the principal 

 animals. Pisidiiiiii and Amnicola predominating. Chironomid larv;c and 

 trichopterid larvae are also numerous. The odonate nymph is Didymops. 

 Caddis-fly cases are empty. Compare with figure 36. Mussels not figured. 



