116 MR. W. WEST ON THE FRESHWATER, 



longius, apicibus truncatis, angulis rotundatis, leviter et latissime 

 constrictae, lateribus rotundatis ; a vertice visae elliptic^ ; a 

 latere visse oblongae, leviter constricts. 



Long. 8-5-10 /Lt ; lat. 10 /* ; lat. isthm. 8 fi ; crass. 6 /j. 



I. Kylemore. 



3. Sph^rozosma PYGM2BUM, nob. [Spl 



Eur 



p. 150).] 



"West-port 



The Irish specimens seen had no mucous sheath ; those seen 

 from Mickle Fell (Freshwater Algae of N. Yorks. in Journ. Bot. 

 Oct. 1889) had a sheath 11 p in diameter. 



f4. S. ptjlchrum:, Arch., var. triquetruit, Lun d (JDesm. Suec. 

 p. 93). (PI. XIX. fig. 3.) 



Long. cell. 20-22 fx ; lat. 28-30 p ; lat. isthm. 22-27 p. 

 I. Lakes, Clifden to Roundstone. 



1. Onychonema eiliforme, Roy et JBiss. {Jap. Desm. p. 242). 

 [O. Nordstedtiana, Turn.~] 



I. Lakes near Recess ; Derryclare Lough; Clifden; Round- 



stone. 



tab. 1. fig. 1. 



Ifi 



Long. 12*5-15 /*; lat. 19-21 H ; lat. isthm. 14-17 fi ; diam. 

 zygosp. 20-33 /*. 



I. Near Westport ; near Leenane ; Ballynahinch (cum 

 zygosp.); Arderry, Oorid, and Derryclare Loughs; Roundstone; 

 near Oughterard (cum zygosp.) ; Lakes, Clifden to Roundstone ; 

 Lakes near Recess (cum zygosp.). — II. Upper and Lower Lakes 

 of Killarney ; Carrantuohill ; Cromagloun ; Sugar Loaf Mt. ; 



Mallow 



Caragh; Castletown. 



fran Gronl. p. 43). [H. dis- 



Nord 



] 



II. Lough Guitane. 



Var. HiANs, Wolle. (Freshw. Alg. of U. 8. p. 21, pi. 54. 

 figs. 14-16.) 

 I. Clifden. 



