ALGJE OF WEST IRELAND. 197 



This Scytonema approaches large forms of S. tolypotrichoiJes, 

 Kuetz., but it has a comparatively thicker internal trichome; it 

 was only seen in small quantity. 



II. Upper Lake of Killarney. 



Naeg 



m 



Diam. trich. cum vag. 20-28 fx ; diam. trich. sine vag. 15-18 /i. 



1. Athry Lake. — II. Cloonee Lough. 



i 

 i 



2. S. turfaceum:, Cooke. {Brit. Freshw. Alg. p. 272, tab. 111. 



fig. 2.) 



II. 8 m. S. of Kenmare. 



The last two are probably Lichens when mature. 



Ord. OsCILLARIACEJE. 



1. Oscillaria prtnceps, Vctucfi. (Rabh. Fl. Eur. Alg. ii. 

 p. 112.) 



Lat. 30-32 h i. 



I. Near Westport.— II. Sugar Loaf Mt. ; Adrigole ; Castle- 

 town; Glentrarriff. 



2. O. Froliciiit, Kuetz. (Iiabh. Fl. Europ. Alg. ii. p. 109 ; 

 Cooke's Brit. Freshw. Alg. p. 253, tab. 97. fig. 7.) 

 I. Creggan Lough. 



3. O. nigroviridis, Thw. (Babh. Fl. Europ. Alg. ii. p. 292; 

 Cooke's Brit. Freshw. Alg. p. 252, tab. 9S. fig. 2.) 



Lat. til. 12-5 /i. 



I. Near Westport. 



4. O. limosa, Ag. (Iiabh. Fl. Europ. Alg. ii. p. 101 ; Cooke s 

 Brit. Freshw. Alg. p. 251, tab. 97. fig. 3.) 



II. Cloonee Lough; Carrantuohill. 



5. O. tenuis, Ag. (Iiabh. Fl. Europ. Alg. ii. p. 102 ; Cooke's 

 Brit. Freshw. Alg. y. 249, tab. 90. fig. 8.) 



II. Castletown; Carrantuohill; Mallow. 



Fl 



Fi 



Lat. fil. 3 fx. 



Westport 



