134 ME. W. WEST ON THE FKESHWATEK 



i 



5. Miceasterias americaka, Ralfs in Brit. Desm. p. xix 

 (errata et addenda), tab. 10. fig. 1. 



II. Carrantuohill. 



6. M. dexticulata, Breb. (Ralfs, Brit. Desm. p. 70, tab. 7. 



fig. 1.) 



Long. 205-235 li ; lat. 185-192 ix ; lat. isthm. 31-40 /i. 



I. Near Leenane ; near Westport ; Derryclare Lough ; Creggaa 



Lough ; Nacoogarrow Lough ; Ballynahinch ; Lough Aunierin ; 



Kyle m ore ; near Oughterard ; Roundstone; near Recess. — II. 

 Carrantuohill ; Grlengarriff ; Castletown. 



7. M. eotata, Ralfs. {Brit. Desm. p. 71, tab. 8. fig. 1.) 

 Long. 220-240 /i ; lat. 195-220 li; lafc. isthm. 35-40//. 



I. Near Westport ; near Oughterard ; Lakes, Clifden to 

 Roundstone ; Nacoogarrow Lough ; Ballynahinch ; Kylemore ; 

 Creggan Lough ; Lough Aunierin. — II. Croinagloun ; Tore Mt. ; 

 Sugar Loaf Mt. ; Grlen Caragh; Glengarriff; Castletown; 

 Clogerheen. 



tf Forma gbakulata. 

 F. membrana irregulariter sparsimque sed distinctissime granu- 



lata. 



I. Lough Aunierin. 



8. M. Thomasiana, Arch. (Rabh. Alg. Europ. 1868, p. 192.) 



II. Glen Caragh ; Cloonee Lough. 



ttForma majoe. 



Long. 315 fx; lat. 285 ix ; lat. isthm. 38 /i. 



I. Arderry Lough. 



The specimens observed only differed from the type in being 

 about half as large again. 



The following dimensions show the relative breadth and length 

 of specimens observed from various parts of the British Isles : ■ 



Arderry Lough, Connemara lat. : long. = l : 1*105. 



Glen Shee, Perthshire „ = 1 : 1*266. 



"Wrynose, Lake District „ =1 : 1-200. 



Mr. W. Archer's original speci- 1 , 1*129. 



mens from Ireland 



9. M. badiosa, Ag. (Ralfs, Brit. Desm. p. 72, tab. 8. fig. 3.) 

 Long. 150 p ; lat. 130 lx\ lat. isthm. 30 li. 

 L Derryclare Lough. 



