NOTES OF ALG, 201 
To this genus may probably be added another very fine 
species which Mr. Ralfs calls S. bacillare. 
Tetmemorus Brebissonii, Ralfs, T. granulatus, Ralfs. 
Xanthidium aculeatum, Ehr., X. fasciculatum, Ehr., X. fur- 
catum, Ehr., X. polygonum, Hass. 
II. Hill of Fare, fourteen miles west from Aberdeen, at 
450 feet, found by Mr. F. Grant. 
Closterium Diane, C. Digitus, C. lineatum, C. moniliferum. 
Cosmarium Botrytis, C. crenatum, C. quadratum, C. marga- 
ritiferum. 
Euastrum affine, E. Didelta, E. gemmatum, E. oblongum, E 
Pelta, E. rostratum. T 
Micrasterias rotata. me 
Staurastrum mucronatum, S. orbiculare, S. tetracerum. 
Tetmemorus Brebissonii. 
II. Pannanich Cliffs, forty miles inland, 1000 to 1100 feet. 
Closterium Digitus, C. margaritaceum, C. Trabecula. 
Cosmarium quadratum, C. nice, eee 
Cylindrocystis Brebissonii. 
E Sw muricatum, S. tricorne. 
: Tetmemorus Brebissonii, T. granulatus. 
IV. Near Linn of Dee, sixty- T RA 1190 feet. 
Diane, C. Trabecula, C. turgidum. 
: un Series. c. ornatum. | 
+ Tetmemorus Brebissonii. 
+ Glen Lai, do diet us n, (361800 feet. 
strum afine, E Didelta, E. Pelia. : 
strum eroe Ld cm S. 
