Ralfs, John (1807-1890)
BRITISH ALGAE, DRIED SPECIMENS OF MARINE AND FRESHWATER ALGAE, INCLUDING THE DESMIDIEAE AND DIATOMACEAE.
Volume I, numbers 1-40. Penzance (Paddy), c. 1850.
Specimens are dried on paper.

Tabellaria flocculosa
Wales
Ralfs 31

Tabellaria fenestratum
Wales (Gwynedd) Dolgelley
Ralfs 32

Grammatophora juergensii
England (Cornwall) Penzance
Ralfs 33

Exilaria pulchella
England (Cornwall) Penzance
Ralfs 34

Achnanthes exilis
Wales (Gwynedd) Dolgelley
Ralfs 35

Gomphonema dichotomum
England (Cornwall) Penzance
Ralfs 36

Gomphonema geminatum
Wales (Gwynedd) Dolgelley
Ralfs 37

Encyonema prostratum
England (Devon) Ilfracombe
Ralfs 38

Berkeleya fragilis
England (Cornwall) Penzance
Ralfs 39

Homoeocladia anglica
Homoeocladia martiana
England (Devon) Ilfracombe
Ralfs 40