i 9 4 ANNALS OF SCOTTISH NATURAL HISTORY 



Mierasterias, Ag. 



Micrasterias denticulate Breb. Tent's Moor. 

 „ rotata, Grev. Tent's Moor. 



papillifera, Breb. Tent's Moor. 

 truncata, Corda. Tent's Moor. 

 crenata, Ralfs. Tent's Moor. 



5' 

 5? 



Euastrum, Ehr. 



Euastmm verrucosus, Ehr. Tent's Moor. 

 oblonguui, Grev. Tent's Moor. 

 anipullaeeum, Ralfs. Tent's Moor. 

 ansatum, Ralfs. Tent's Moor. 

 pectinatum, Breb. Tent's Moor. 

 rostratum, Ralfs. Tent's Moor. 

 elegans, Breb. Tent's Moor. 

 bidentatum, Nag. Tent's Moor. 

 declive, Reinsch. Tent's Moor. 

 deuticulatum, Kirch. Tent's Moor. 

 bi7iale, Turp. 



(a) Forma viinuta, Lund (Ralfs, " Br. Des.," t. xiv Za 



Tent's Moor. 



(b) Forma (Ralfs, I.e., §b). Peat End. 



(e) Forma (Ralfs, I.e., &c, d). Tent's Moor. 

 (d) Forma (Ralfs, I.e., Se). Tent's Moor. 



Cosmarium, Corda. 



Cosmarium mcirgaritiferum, Turp. Tent's Moor ; Scotscraig. 

 reniforme, Archer. Tent's Moor. 

 Turneri, Roy. Tent's Moor. 

 prcemorsum, Breb. Tent's Moor. 

 ochtlwdes, Nordst. Tent's Moor. 

 tetraophtiialmum, Kiitz. Tent's Moor. 

 Botrytis, Bory. Tent's Moor. 

 Brebissonii, Menegh. Tent's Moor. 

 gemmiferum, Breb. Kemback ; Mount Melville. 

 gradatum, Roy. Mount Melville. 

 punctulatum, Breb. Peat End. 

 subpunctiilatum, Nordst. Tent's Moor ; Kemback 



Peat End ; Scotscraig. 

 Blyttii, Wille. Peat End. 



Slewdrumense, Roy. Tent's Moor ; Mount Melville. 

 striatum, Boldt. Tent's Moor. 

 substriatum, Nordst. Tent's Moor. 



