DESMIDIKE. 99 



Cosmarium margaritiferum, (Turpin) 



Stapleton; Brislington ; Fishponds; Bedminster; 

 Chelvey. 



Cosmarium ornatum, (Ralfs) 



Eoad-side ditch, Shirehampton. 



Cosmarium Thwaitesii, (Ralfs) 

 Shirehampton. 



Cosmarium tetraophthalmum, (Kiitz.) 



Duchess' Pond, Stapleton ; Chelvey. 



Cosmarium undulatum, (Corda) 



Stapleton. 

 Desmidium Swartzii, (Ag.) 



Stapleton; Filton. 



Docidium baculum, (Breb.) 



Stoke Bishop ; Charfield ; Brislington. 



Docidium nodulosum, (Breb.) 



Durdham Down, east side ; Leigh ; Westbury ; 

 Failand. 



Euastrum ansatum, (Ehr.) 



Under Dundry Hill. 



Euastrum binale, (Turp.) 



Damory Bridge. 



Euastrum didelta, (Turp.) 



Stapleton ; Durdham Down Reservoir. 



Euastrum elegans, (Breb.) 



Yate ; Fishponds. 



Hyalotheca dissiliens, (Smith) 



Stapleton ; Yate. 



Hyalotheca mucosa, (Mert.) 



Avening Grreen. 



Micrasterias denticulata, (Breb.) 



Bedminster ; Dundry ; Yate ; Durdham Down 

 Reservoir. 



