Class 1. MAMMALIA. 
Sub-class MONODELPHIA. 
Order CHIROPTERA. 
Sub-order MIGROGHIROPTERA. 
Family RHINOLOPHIDiE. 
1. Rhinolophus hipposideros, Bechst. Lesser Horseshoe Bat, 
2. Rhinolophus ferrum-equinum, Schreb. Greater Horse- 
shoe Bat. 
Family VESPERTILIONID-aB. 
3. Synotus barbastellus, Schreb. Barbastelle. 
4. Plecotus auritus, L. Long-eared Bat. 
5. Vesperugo serotinus, Schreb. Serotlne. 
6. Vesperugo discolor, Natterer. Particoloured Bat. 
7. Vesperugo noctula, Schreb. Noctule. 
8. Vesperugo Leisleri, Kuhl. Hairy-armed Bat. 
9. Vesperugo pipistrellus, Schreb. Pipistrelle. 
Not so rare as formerly supposed, and certainly has been 
more observed of late years. 
Rare throughout Caithness, especially in the barer portions. 
Mr. Wm. Eeid has never heard of more than one or two 
of this species having been found in the county, until 
