ALGiE OF WEST IRELAND. 113 



tfForma microspora. (PL XVIII. fig. 17.) 

 Crass, cell, veget. 4/x (16plo longioribus) ; long. spor. 18 /x. 

 I. Creggan Lough. 



Ord. Zygxemace^e. 



■ 



1. Spirogyra BELLIS, Crouan. {Petit, Spir. des Environs 

 de Paris, p. 31, tab. 10. figs. 1-3.) 



Crass, cell, veget. 56-60/4 (3^-4plo longioribus); diam. zygosp. 

 72-80 /i ; crass, zygosp. 50 44. 



II. Water-lily pool near the Lower Lake of Killarney. 



2. S. Tartars, Kuetz. {Petit, h e. p. 19, tab. 4. figs. 1-8.) 

 Forma zygosporis diametro 1^-plo longus. 



II. Cloonee Lough. 



3. S. caten^formis, Kuetz. {Petit, I. c. p. 17, tab. 3. 

 figs. 9-12.) 



Crass, cell, veget. 20 /x; long, zygosp. 47-60 ix; lat. zygosp. 

 22-24 /x. 



I. Lakes, Clifden to Roundstone. 



4. S. tenuissima, Kuetz. {Petit, I. c. p. 6, tab. 1. figs. 1-3.) 

 Crass, cell, veget. 14-15 fj (6plo longioribus) ; crass, spor. cell. 



35ix; long. spor. cell. 87 /* ; crass, zygosp. 27 /x ; long, zygosp. 

 40 i4. 



I. Roundstone. 



5. S. sp. 



Cellulae diametro (34-40 44) 2f-3|plo longioribus, extremitati- 

 bus nunquam replicatis, fascia spirali anfractibus 2|-5|. 

 Pool, Burren Hills, Co. Clare. 



I. Ztgnema leiospermum, De Bary. {Eabh. Fl. Europ. Alg. 

 iii. p. 249.) 



Forma cum cellulis sterilibus diametro l£-3plo longioribus. 

 Crass, cell, veget. 20-21 /i ; long. l^-3plo major; diam. zygosp. 

 25-275 ix. 



II. Glen Caragh. 



tt Forma minor. 

 Forma cum cellulis sterilibus et zygosporis parvioribus. 



