22 



TALPID^— TALPA 



Fig. 10. — Section of Fortress, with 

 heap made entirely of earth excavated 

 from nest, and pushed upwards through 

 one tunnel. There are two bolt-runs. 



Fig. 1 1. — Plan of Low-lying Fortress 

 ON Boggy Ground, the whole heap 

 formed by a single tunnel (a) leading 

 upwards from the nest. There are seven 

 direct outlets from the nest. 



Fig. 12.— Section of Fortress shown in 

 Fig. 6, showing spiral gallery and blind ter- 

 minals. 



Fig. 13. — Plan of Fortress, showing 

 portions of tunnels which subsequently 

 fell in, and their probable course ..... 



Fig. 14.— Plan of Unusual Fortress with both Upper and 

 Lower Circular Galleries. 



