208 



The Scottish Naturalist. 



5. Truncata, Archer. 



Ditch at Meikle Moss, Alford ; Tonley. 



staurastrum (Meyen) Ralfs. 



1. Aaitum, Breb. 



Insch. 



2. Alternans, Breb. 



Correnie ; Little Don ; Whiteley Marsh ; Tonley. 



3. Apiculatum, Breb. 



Little Don ; Whiteley Marsh ; Tonley. 



4. Armigerum, Breb. 



Little Don ; Tillyfour. 



5. Artiel/u\ Boldt. 



B. inornatum, Roy. With scattered granules. Tough. 



6. Asperum, Breb. 



Towie. 



7. Avkula, Breb. 



Little Don ; Whiteley Marsh ; Pond, Haughton. 



8. C ont rover sum > Rail's. 



Correnie. 



9. Cristatum, Nag. 



Little Don. 



10. Cyrtocerum, Breb. 



Correnie ; Whiteley Marsh; Little Don; Pond, Haughton. 



1 1 . Bejectum, Breb. 



Little Don. 



12. DicMei, Ralfs. 



Correnie ; Tillyfour ; Whiteley Marsh ; Little Don ; Pond, 

 Haughton; Tonley. 



13. Dilatatum, Ehr. 



Tillyfour, Tonley. 



14. Dispar, Breb. 



Tillyfour ; Pond, Haughton. 

 T5. Furcigerum, Ralfs. 

 Little Don. 



16. Gracile, Ralfs. 



Little Don ; Tonley. 



17. Hexacerum, Ehr. 



Little Don ; Whiteley Marsh. 



18. Hirsutum, Ralfs. 



Waterside, Haughton, Wellhouse. 



