144 MR. W. WEST ON THE FRESHWATER 



13. Cosmakitjm yariolattjm, Lund. (Desm. Suec. p. 41, 

 tab. 2. fig. 19.) 



Long. 32-34 /x ; lat. 18-20 fi ; lat. isthm. 5-6 ju. 



I. Athry Lough ; Ballynahinch. 



Forma apice levissime retuso. 



Long. 29 /u ; lat. 16 p ; lat. isthm. 5 //. 



I. Lakes, Clifden to Eoundstone. 



II. Clogerheen. 



(Ate 



ff Var. angujstatttm, nov. var. (PL XXIV. fig. 22.) 

 Var. longius quam latum, semicellulse subcirculares, marginibus 

 lateralibus subrectis, leviter products ad basin, apicibus incras- 



satis. 



Long. 42*5 yn ; lat. 34^ ; lat. isthm. 11 /x. 

 II. Carrantuohill. 



% 



15. C. pachtder^ium, Lund. {Desm. Suec. p. 39, tab. 2. 

 fig. 15.) 



I. Lough Aunierin. 



f 16. C. perforatum, Lund. {Desm. Suec. p. 40, tab. 2. fig. 16.) 

 Long. 60-75 ^ ; lat. 57-60 ^ ; lat. isthm. 26-32 /u. 

 I. Ballynahinch; Lakes east of Lough Bonn ; Derryclare 

 Lough ; Lakes, Clifden to Eoundstone. 



17. C. circulare, Beinsch. (Alg. FI. p. 108, tab. 10. fig. 2.) 

 Long. 90 fi ; lat. 75 ft ; lat. isthm. 25 fi. 



I. Creggan Lough. 



18. C. pyramidattjm, Breb. in Balfs, Brit. Bern. p. 94, 

 tab. 15. fig. 4. 



Long. 58-100/* ; lat. 45-62 fi ; lat. isthm. 17-5-20 /x. 



I. Near Westport; Ballynahinch; Athry Lough; Lough 

 Shindilla ; near Eecess ; Eoundstone ; Lakes, Clifden to Eound- 

 stone; Oughterard; Arderry Lough ; Lough Aunierin ; Creggan 

 and Boy Loughs ; Nacoogarrow Lough. — II. Tore Mt. ; Lower 

 Lake of Killamey ; Glen Caragh ; Castletown ; Sugar Loaf 

 Mt. ; Glengarriff; Cloonee Lough ; Adrigole. 



19. C. pseudoptramidattjm, Lund. (Desm. Suec. p. 41, 

 tab. 2. fig. 18.) 



