118 MR. W. WEST OS THE FRESHWATER 



* 



I. Near Westport ; Moher Lough ; Roundstone ; Arderry 

 Lough ; Lough Aunierin ; Ballynahinch ; Lakes, Clifden to 

 Roundstone ; Lough Shannacloontippen. — II. Cromagloun ; 

 Castletown ; Glengarriff: ; Adrigole. 



+2. Docidium: dilatatum, Lund. (Desm. Suec. p. 88, tab. 5. 

 fig. 12.) (PI. XIX. fig. 5.) 



Long. 225 /x ; lat. ad bas. semn ell. 16//; lat. ad apic. 



13-15 fx. 



I. Near Oughterard ; Kylemore; Oorid Lough. — II. Crom- 

 agloun ; Tore Mt. ; Glen Caragh. 



A form from Cromagloun was noticed which had from 12-13 

 undulations to each semicell. Long. 262 /x ; lat. 13-14 fi. 

 (PL XIX. fig. 6.) 



ft Var. suBUtfDULATUM-, nov. var. (PL XIX. fig. 7.) 

 Var. undulis minoribus profundis, cellulis brevioribus, semi- 

 cellulibus inflatis medio et membrana forte punctata. 

 Long. 187 fx ; lat. 15 jx. 

 I. Near Oughterard. — II. Glen Caragh. 



1. Pleurot^nium coronatttm, Babh. (Fl. Europ. Alg- iii* 

 p. 143.) (PL XIX. figs. 8-10.) 



Long. 465-560 /z; lat. ad bas. semicell. 42-58^ ; lat. ad apic. 

 37-45 fi. 



I. Lough Derryclare ; Lough Aunierin ; Lough Shannacloon- 

 tippen. 



* 



ffVar. fluctfatum, nov. var. (PL XIX. fig. 11.) 

 P. diametro 15-16plo longius ; semicellulis non angustis polos 

 versus, undulatis in ambitu toto. 



Long. 670 /Li; lat. ad bas. inflat. 55 /* ; lat. ad med. semicelL 



43 fi ; lat. ad apic. 50 fx. 

 I. Lough Aunierin. 



ttVar. ROBT7SXUM, nov. var. (PL XIX. fig. 12.) 

 P. circiter diametro 8plo longius : semicellulis cylindncis, 



leviter subundulatis lateribus, contractis distincte ad apicem 



extremum. 



Long. 460 p; lat. ad bas. inflat. 57 /x; lat. ad med. semicelL 55 fx; 



lat. ad apic. 48 fx. 



I. Lough Derryclare. 



