ALG^J OF WEST IRELAND. 175 



24. Staurastrum pilosum, Arch, in Pritch. Infus. ed. 1861, 

 p. 739. 



I. Lough Shannaclooutippen ; near Leenane ; Ballynabinch 

 Athry and Shindilla Loughs ; near "Westport. — II. Cromagloun ; 

 near Lough Brin ; Castletown ; Carrantuohill. 



25. S. teliferum, Ralfs. {Brit. Desm. p. 128, tab. 22. 

 fig. 4.) 



Westport 



Lakes, Clif den to Roundstoue ; Roundstoue ; Lakes near Recess ; 

 Lough Aunierin ; Creggan Lough ; Lough Shannacloontippen ; 

 Oorid Lough ; Lakes east of Lough Bofin. — II. Lough Gruitane ; 

 Tore Mt. ; Muckross ; Upper and Lower Lakes of Killarney ; 

 Carrantuohill ; Adrigole ; near Lough Brin ; Grlengarriff ; Castle- 

 town. 



A zygospore of this species is figured (PI. XXIV. fig. 5) which 

 has six semicells attached, as if it had been produced by the con- 

 jugation of three cells instead of two. 



ttForma obtusa. (PI. XXIV. fig. 6.) 

 Forma spinis brevibus obtusisque. 



Long, sine spin. 45 /i ; long, cum spin. 50 // ; lat. sine spin. 

 39 fi ; lat. cum spin. 45 /x ; lat. isthrn. 12'5 /*. 

 I. Lakes, Clifden to Roundstone. 



t26. S. polytrichum, Perty. {Rabh. FL Europ. Alg. iii. 

 p. 214.) (PI. XXII. fig. 18.) 



Long, sine spin. 59-67 /x; long, cum spin. 70-80 /x; lat. sine 

 spin. 45-58 /x; lat. cum spin. 56-70 /x ; lat. isthm. 17-21. 



I. Lakes, Clifden to Eoundstone. — II. Cloonee Lough. 



27. S. spongiosum, Breb. (Ralfs, Brit. Desm. p. 141, tab. 23. 

 fig. 4.) 



II. Adrigole; Carrantuohill. 



tfVar. perbiftdum, nov. var. (PI. XXIII. fig. 3.) 

 Var. spinis longioribus et prof unde furcatis. 

 Long, sine spin. 42 ^ ; long, cum spin. 52 // ; lat. sine spin. 

 M 5 ^t. cum spin. 52 /i ; lat. isthm. 15 /x. 

 I. Near "Westport. 



28. S. asperum, Breb. in Ralfs, Brit. Desm. p. 139, tab. 22, 



38 



fig. 6- 



I. Near Oughterard; Ballynabinch. — II. Carrantuohill. 



