Plate I. 

 Kxtenial npiiea ranee ^f Teras XII. 

 Fig. 1. Semi-profile from right side. 

 Fig. 2. Dorsal view. 

 Fig. 3. Ventral view. 



a., Median eye ; b., Everted brain tissue ; c, Papilla-like protuberance from 

 inner side of each mouth; d., Right external ear: e., Right (outer) eye of A; 

 f., Median protuberance formed by the rami of the two inner mandibles ; 

 g., Left (outer) ej'e of B; h.. Throat warts. 



