PIPISTRELLUS 



lOI 



perceptible, and the auditory bullae are more prominent than 

 in Myotis, less so than in Barbastella. 



Fig. 8. — Side View (diagrammatic and enlarged) OF Skulls and Teeth of 



1 . Pipistrellus pipistrellus. 



2. Myoiis d(Xubentoni. 



3. M. mystacmus. 



4. Plecotus aurilus. 



5. Barbastella barbasielbis. 



6. Rhiiwlopkus hipposideros. 



The teeth are similar in number and arrangement to those 

 of Nycta/us, but the inner upper incisor is both more bicuspid 



