186 ME. W. WEST ON THE FRESHWATER 



74. Stattrastrum furcigerttm, Breb. [Didymocladum furci- 

 gerum (Breb.\ Half s, Brit. Desm. p. 114, tab. 33. fig. 12.] 



Long, cum proc. 60-75 fi\ long, sine proc. 37-5-40 /i; lat. cum 

 proc. 50-67 \x ; lat. isthm. 14-16 fx. 



I. Lakes near Recess ; Arderry and Creggan Loughs ; Bally- 

 naliinch. — II. Glen Caragh. 



75. S. Arctiscon, Lund. (Desm. Suec. p. 70, tab. 4. fig. 8.) 

 I. Lakes east of Lough Bofin. 



76. S. ljeye, Balfs. (Brit. Desm. p. 131, tab. 23. fig. 10.) 



II. Adrigole. 



fig- 5.) 



m 



II. Lough Guitane ; Adrigole 



tab. 21. fig. 9.) 



Ifs, Brit. Desm 



Forma tetragona. 



I. Near Westport ; Eoundstone ; Kylemore ; Oorid Lough ; 

 near Oughterard; Lakes, Clifden to Eoundstone and near 

 Eecess. — II. Lough Guitane ; Cromagloun ; Lower Lake of 

 Killarney ; Glen Caragh ; Carrantuohill ; Castletown. 



Forma pentagona. 



I. Kylemore; Ballynahinch ; Lakes, Clifden to Eoundstone. 



Mt 



Glen Caragh. 



Forma hexagona. 



I. Kvlemore. 



fVar. hirtum, Nord. (Be Alg. et Char. i. p. 11, tab. 16. 

 fig. 18.) 



II. Castletown; Carrantuohill. 



tt79. S. arachnoides, nov. sp. (PI. XXIV. fig. 4.) 



S. mediocre, modice constrictum, sinu lato et obtuso; semi- 

 celluhe latecampanulatse, apicibus truncatis granulis emarginatis 

 prseditis, processibus longis gracillimis denticulatis leviter incur- 

 vatis ad angulos superiores, apicibus tridenticulatis ; a vert ice 

 visae annulo granulorum novem intra margiueni, pentarauiatie, 

 processibus longis attenuatis subflexis. 



