114 ME. W. WEST ON THE JFEESHWATER 



Crass, cell, veget. 16-17 n ; long. 2-2£plo major; diam. zygosp. 



20-23 //. 



II. Cloonee Lough. 



tf^orma megaspoba. (PI. XVIII. figs. 4-5.) 

 Forma sporis multum largioribus. 

 Crass, cell, veget. 27-28 /u; diam. zygosp. 40-45 fx. 



1. Lough Shindilla. 



2. Zygnema, sp. 



Cellulae diametro (18-20 /i) 2-3plo longioribus ; diam. cell, 

 veget. cum vag. 35-40 ft. 



I. Lakes, Clifden to Roundstone. 



- 



tf3. Z. (Zygogonium) momon iense, nov. sp. (PI. XXIV. fig. 26.) 

 Z. cellulis sterilibus diametro l|-2plo longius, tubo connexivo 



multe inflato ; zygosporis late ellipticis (axe longiori parallelo ad 



filamentos), membrana glabra. 



Crass, cell, veget. 20-22 /i ; long l|-2plo major; long, zygosp- 



30-33 /x ; lat. 25-27 ft. 



II. Castletown. 



This species differs from Z. Malfsii, De Bary, in its larger 

 size, its shorter sterile cells, and its much larger, differently 

 shaped zygospores. 



Ord. Desmidiace^e. 



1. Gonatozygon Kalfsii, De Bary. (Cooke y Brit. Desm* p. 2, 

 tab. 1. fig. 1.) 



1. Near Westport ; near Recess; Baheh Loughs. — II. Muck- 

 ross; Glengarriff. 



2. G. Beebisso^ii, De Bary. (Cooke, Brit. Desm. p. % tab. 1- 

 fig. 2.) 



Long. 157 fi ; lat. 9 fi ; lat. apic. 7 /j. 



I. Near Westport ; Baheh Loughs ; Lakes, Clifden to Bound- 

 stone ; Boundstone ; Lough Aunierin ; Athry Lough. — II. Lougn 

 Guitane ; Upper and Lower Lakes of Killarney ; Adrigole ; 

 Castletown; Glengarriff; Carrantuohill ; Cloonee Lough. 



3. G. minutum, West. (Fr. Wat. Alg. of X. Wales, p. 282, 

 tab. 5. fig. 1.) 



Long. 62-85 fx ; lat. 3-5 /x ; lat. apic. 3-4 p. 



