OLIGONEPHRIDIA 



279 



mge 



mes- 





mx 



//Ml/^ — — ^T 



proct 



mge 



Fig. 212.— Anasa. Parasagittal section, (am) Amnion, (am. cav) Amniotic cavity. 

 (6r) Brain. (/) Fat. (lb) Labium, (md) Mandible, (mes) Mesoderm, (mge) Mid-gut 

 epithelium, (mx) Maxilla. W Thoracic legs, (prod) Proctodaeum. (ser) Serosa. 



