136 MR. W. WEST ON THE FKESH WATER 



Jenneri, Balfs, f. Brasiliensis, Boerg. (Desm. Brasil. p. 936, 



tab. 2. fig. 11).] 

 Long. 150 p. ; lat. 100 /x ; lat. isthm. 25 /i. 



* 



I. Ballynahinch. 



1. Euastrum VERRUCOSUM, Ehrenb. (Ralfs, Brit. Desm. p. 79, 



tab. 11. fig. 2.) 



Long. 93-110 ia ; lat. 75-86 fx ; lat. isthm- 22 /i. 



I. Creggan, Boy, Shannacloontippen, and Derryclare Louglis ; 

 Lougb Aunierin ; Lakes, Clifden to Eoundstone, and near 

 Recess ; near Westport ; Lakes E. of Lougb Bofin. — II. Lougb 

 Guitane ; GlengarrifE ; Cloonee Lougb ; Muckross ; Adrigole. 



tVar. coarctatum, Delp., forma. (PI. XX. fig. 11.) 



A form of tbis is figured wbicb bas tbe intermediate lobules or 

 the semicells very sbort, with tbe subapical sinus wider and 

 shallower. 



Loug. 90 /Li ; lat. ad bas. semieell. 76 /x ; lat. pol. lob. S2'o fx; 

 lat. isthm. 21 /j.. 



I. Derryclare Lough. 



Compare with E. verrucosum, Ehrnb., reductum, Nord. (De 

 Alg. et Char. i. p. 9, tab. 16. fig. 14). 



fVar. alatum, Wolle. {Desm. U.S. p. 101, tab. 26. fig. 4.) 



II. Cloonee Lough. 



Ifs. (Brit. Des 



Long. 144-167 /i ; lat. 80-83 fi ; lat. isthm. 20-26 fi ; crass. 52 fi. 



Westport 



dstone, and E. ot 



Lough Bofln; near Oughterard; Ballynahinch ; Derryclare 

 _--.„_. II. Lough Guitane; Cromagloun; Tore Mt.; Muckross; 



Glengarriff ; Castletown ; Carrantuohill ; Glen Caragh. 



3. E. cbassum, Kuetz. (Ralfs, Brit. Desm. p. 81, tab. li- 

 ng. 3.) 



Long. 167-185 /x ; lat. 87-97 \x ; lat. isthm. 24-27 fx. 



I. Ballynahinch ; Kylemore; Lough Aunierin; Oorid Lough; 

 Arderry Lough ; near Oughterard. — II. Cromagloun ; Tore Mt. 5 

 Muckross ; Carrantuohill ; Glen Caragh ; Sugar Loaf Mt. ; 

 Glengarriff; Upper Lake of Killarney ; Castletown. 



fVar. sckobiculatum, Lund. (Desm. Suec. p. 18, * aD - ' 



fig. 1.) 



II. Cromagloun. 



