22 



TALPID^— TALPA 



Fig. io. — Section of Fortress, with 

 heap made entirely of earth excavated 

 from nest, and pushed upwards through 

 one tunnel. There are two bolt-runs. 



5. 



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

 ON Boggy Ground, the whole heap 

 formed by a single tunnel (rz) 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 .... 



I 



iic-g^ 



Fig. 



14.— Plan of Unusual Fortress with both Upper and 

 Lower Circular Galleries. 



