ALGiE OF WEST IRELAND. 143 



t7. Cosmarium eductum, Roy et Biss. in Nord. Desmideer 

 fran Bornholm, p. 198, tab. 6. fig. 8. 



tf Var. angustatum, nov. var. (PL XX. fig. 20.) 

 Var. minor, apicibus angustioribus, constrictione profundiore ; 

 membrana delicatissima sed distincte punctata. 



* 



Long. 30 ft ; long, partis producta3 3'5-4yu ; lat. max. 21'5 li ; 

 lat. sub apic. 14 /i ; lat. apic. 11-12*5 p : lat. isthm. 6*5. 



I. Bally nah inch. 



The faintly undulate lateral margins of this Irish form are 

 intermediate between the figs. 8 a and 8 b (JNordst. I. c.). 



8. C. Holmiense, Lund. (Desm. Suec. p. 49, tab. 2. fig. 20.) 

 I. Near Oughterard. — II. Glen Caragh. 



9. C. anceps, Lund. {Desm. Suec. p. 48, tab. 3. fig. 4.) 

 I. Ballynahinch ; Lough Aunierin. 



10. C. granatum, Breb. in Ralfs, Brit. Desm. p. 96, tab. 32. 

 fig. 6. 



Long. 37-42//; lat. ad bas. semicell. 235-27'5/z; lat. ad 

 apic. 7-5-8-5 ii ; lat. isthm. 75 li ; crass. 15-17*5 li. 



I. Ballynahinch ; Koundstone ; near Becess ; Creggan Lough ; 

 Lough Aunierin ; Boy, Shindilla, and Nacoogarrow Loughs ; 

 Lakes east of Lough Bofin ; near Westport ; Baheh Loughs ; 

 Letcreen Lough. — II. Glen Caragh ; Adrigole. 



Forma ad var. concavum, Lagerh. (Contrib. a la Fl. Alg. del 

 Ecuador, ii, p. 16), accedens, lateribus subconcavis. 



I. Derrvclare Lough. 



fVar. subgranatum, Nord. {Alg. aq. dulc. Sandvic. p. 13, 

 tab. 2. fig. 8.) 

 Long. 24 fx ; lat. 17 ll ; lat. isthm. 6 ll. 

 I. Derryclare Lough. 



ANGrSTATU 



{Desm. Arct. p. 20.) [Euastrum 



inale, Ralfs, var. angustatum, Wittr. {Goth och Ol. Sotv. Alg. 

 . 50, tab. 4. fig. 8). — Euastrum polare, Nord. {Desm. Spetsb. p. 37, 

 ■ 7. f. 24).] 

 II. Cloonee Lough. 



tl2. C. trtlobulatum, Reinsch. {Alg. Fl. p. 116, tab. 9. fig. 6.) 

 II. Cloonee Lough. 



