6o8 



FRESH-WATER BIOLOGY 



FIG. 931. Microcodon 

 clavus Ehr., ventral 

 view. X 260. (After 

 Weber.) 



FIG. 932. Microcodides robustus 

 Glasscott, with corona (c). X 

 300. (After Rousselet.) 



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; 

 t.infundibulum; m, mouth; mx, mastax; 

 o, esophagus; pr, proventriculus; 

 V, vestibulum. 



FIG. 935. Floscularia uni- 

 loba Wierz. X 125. 

 (After Wierzejski.) 



FIG. 936. Floscularia edentata 

 Collins. X 150. (After Weber.) 



