82 



TURBELLARIA. 



N. melanocephala. 



bioculata. 



octoculata. 



purpurea. 



Borlasii. Fig. 131 ; n. 

 1 trilineata. 

 1 filiformis. 

 ] flaccida. 

 ? unicolor. 



TRIBE II. SEBPENTAEIANA. 



Serpentaria (Goodsir). Body depressed, ab- 

 ruptly pointed before, attenuated behind ; mouth 

 terminal in front; vent beneath, immediately 

 behind it. 



S. fragilis. Fig. 132 ; J- ; and head | n. s. 

 gracilis. 



