AJLGM OF WEST IRELAND. 133 



1. Sfxeotjbkia condensata, Br 6b. in Ralfs, Brit. Desm. p. 179, 

 tab. 34. fig. 1. 



Long. 270 /x; lat. 27 /x. 



I. Lakes, Clifden to Roundstone ; near Leenane ; near 

 Oughterard. — II. Lough Guitane ; Glengarriff; Lower Lake of 

 Killarney ; Cloonee Lough ; Castletown. 



tt2 



) 



Sp. fusiformis, in gelatina matricale nidulans, diametro 5plo 

 longior, apicibus subtruncatis, massa chlorophyllacea in fasciis 

 spiralibus gracilibus duobus, anfractibus densis circiter novem. 



Long. 86-100 /x; lat. max. 18-20 /x; lat. apic. 4-6 /x. 



I. Near "Westport. 



This species differs from S. condensate*, Breb., in having two 

 slender spirals and in its subtruncate ends. It is distinguished 

 from S. obscura, Ralfs, in the definite number of spirals and in 

 the widely different number of revolutions. 



3. S. obscura, Rolfs. {Brit. Desm. p. 179, tab. 34. fig. 2.) 



II. Near Lough Briu. 



1. Micrastertas mucronata, Rabh. {FI. Europ. Alg. iii. 



p. 187.) 



1. Kylemore. 



2. M. piknatifida, Ralfs. {Brit. Desm. p. 77, tab. 10. fig. 3.) 

 Long. 53-61 xx; lat. 57-65 xx ; lat. isthm. 12*5-17 /x. 



I. Ballynahinch ; Lough Aunierin ; Creggan Lough ; Athr} r 

 Lough ; Moher Lough. — II. Adrigole. 



A form of this from Ballynahinch was occasionally met with 

 which had the basal lobes of each semicell distinctly and regularly 

 tridentate. (PI. XX. fig. 9.) 



3. M. furcata, Ag. {Ralfs, Brit. Desm. p. 73, tab. 9. fig. 2.) 

 Long. 160-170 xx ; lat. 145-187 /x ; lat. isthm. 20-25 /x. 



I. Derryclare Lough ; Lakes, Clifden to Roundstone ; Glen- 

 dalough. 



fig. 3.) 



If: (Brit. Desm. p. 73, tab. 9. 



Long. 117-120 fi ; lat. 107-110 p ; lat. isthm. 19 fi 



Kecess 



