AJjQM OP WEST IRELAND. 17 1 



2. Staxtrastrum coxnatum, Boy et Biss. {Jap. Desm. p. 237.) 

 Long, cum spin. 32-37 p ; long, sine spin. 21-22*5 /x ; lat. cum 

 spin. 25-28 yu ; lat. isthm. 9-10 fi. 



I. Athry Lake; near Oughterard ; Ballynahinch; Lakes, 

 Clifden to Eoundstone. — II. Adrirrole. 



3. S. AriciJLATUM, Breb. (Arch, in Britch. Infus. ed. 1861, 

 p. 737.) 



I. Ballynahinch ; Kylemore ; Eoundstone ; Lakes near Ee- 



cess. — II. Carrantuohill ; Lower Lake of Killarney; Cloger- 

 heen. 



4. S. Dickiei, Balfs. (Brit. Desm. p. 123, tab. 21. fig. 3.) 

 Long. 35 /i ; lat. sine spin. 29 /z ; lat. cum spin. 42 /i ; lat. 



isthm. 6 fi. 



I. Bah eh Loughs ; near Westport. — II. Lough Guitane ; 



C5 



Muckross 



Caragh. — Burren Hills, Co. Clare. 



ttForma punctata. 

 Forma membrana minute punctata fnec granulata). (Vide var. 



granulatum, Eoy et Biss. [Jap. Desm. p. 238].) 

 Long. 32 fi ; lat. 33 n ; lat. isthm. 7 /x. 

 I. Clifden ; near Westport ; Ballynahinch.— II. Adrigole. 



5. S. CTJSPIDATUM, Breb. (Balfs, Brit. Desm. p. 122, tab. 21. 

 fig. 1.) 



Westport 



garrow 



II. Lough Gruitane. 



tVar. diveeqens, Word. {Desm. Brasil. tab. 4. fig. 49.) 

 Long, sine spin. 25^; lat. sine spin. 20-22 /i ; long. spin. 



10-12 p. ; lat. isthm. 6 ft. 



I. Ballynahinch ; Glendalough.— II. Adrigole. 



f6. S. corniculatum, Zttwrf. (Desm. Suec. p. 57, tab. 3. fig. 23.) 



ttVar. spinigeeum, nov. var. (PI. XXII. fig. 12.) 

 Var. minor, spinis distinctis ad apices angulorum, et isthmo 



angustiore. 



Long, (sine spin.) 28 n ; lat. 25 n; lat. isthm. 11*5 fi. 



I. Lakes, Clifden to Eoundstone. 



Compare with var. variabile, Nord. (Fr. Wat. Alg. of New 



Zeal. & Austr. p. 39, pi. 4. fig. 17). 







