6o8 



FRESH-WATER BIOLOGY 



Fig. 931. Microcodon 



clavus Ehr., ventral Fig. 932. Microcodides robustus 



view. X 260. (After Glasscott, with corona (c). X 



Weber.) 300. (After Rousselet.) 



Fig. 933. A . Floscularia proboscidea 

 Ehr. Female. X 100. (After 

 Weber.) B, Male of the same. 

 D, Side view of jaws of Floscu- 

 lariidae. (After Wierzejski.) 



Fig. 934. Alimentary canal of Floscu- 

 laria campanulata Dobie. (Modified 

 from Montgomery.) d, diaphragm; 

 i,infundibulum; w, mouth; mx, mastax; 

 0, esophagus; pr, proventriculus; 

 V, vestibulum. 



Fig. 935. Floscularia uni- 

 loba Wierz. X 125. 

 (After Wierzejski.) 



Fig. 936. Floscularia edentata 

 Collins. X 150. (After Weber.) 



