A HISTORY OF CORNWALL 



G RATELOUPIACE^E 



Halarachnion ligulatum, Ktltz. Torpoint, 



Whitsand Bay, Falmouth 

 f. dichotomum, Harv. Wkitsand Bay, 



Paditow 



f. ramentaceum, Harv. Whitsand Bay 

 f. latifolium, Harv. Torpoint 

 Grateloupia *filicina, C. Ag. Whitsand 



Bay, Padstow, Falmouth, Penzance 

 f. intermedia, Holm. & Batt. Padstow 



*dichotoma, J. Ag. Fowey, Padstow, 



Newquay, Falmouth, Penzance, H. 41 



*minima, Crn. Falmouth 



DUMONTIACEJE 



Dudresnaya coccinea, Crn. Torpoint, 

 Fowey, Falmouth 



Dilsea edulis, Stackh. Boscastle, Padstow, 



Falmouth, Lizard, Penzance 

 NEMASTOMACE.S 



Schizymenia Dubyi, J. Ag. Mount Edg- 

 cumbe, Padstow, Penzance 



Nemastoma *marginifera, J. Ag. Whit- 

 sand Bay, Padstow 

 SQUAMARIACE.S 



Petrocelis cinema, J. Ag. Fowey, Looe, 

 Padstow, Falmouth, Penzance 



Cruoria pellita, Lyngb. Pridmouth, Pen- 

 zance 



Cruoriella Dubyi, Schm. Pridmouth, Pen- 

 zance 



Rhodophysema *Georgii, Batt. Scilly Isles 



Peyssonelia Harveyana, Crn. Penzance 



*Rosenvingii, Schm. Cornwall 



(Batters' Catalog, p. 95) 



*atropurpurea, Crn. Penzance, Scilly 



Isles 



SQUAMARIACE^: (continued) 



Haematophlcea *Crouani, Crn. Padstow, 

 Penzance 



CORALLINACE^: 



Lithothamnion *coralloides, Crn. Penzance 



lichenoides, Fosl. Looe, Fowey, Pad- 



stow, Falmouth 



*f. agariciforme, Fosl. Fa/mouth 

 Epilithon membranaceum, Fosl. Fowey, 



Penzance 

 Lithophyllum racemus, Fosl., *f. crassa, 



Fosl. Falmouth 



incrustans, Phil., f. Harveyi, Fosl. Fal- 



mouth, Lizard 



Melobesia farinosa, Lainx. Looe, Padstow, 

 Falmouth 



Lejolisii, Rosan. Falmouth, Scilly Isles 



Corallinae, Solms. Looe, Fowey, Pad- 



stow, Lizard, H. 12 



*hapalidioides, Fosl., f. confinis, Fosl. 



Boscastle, Portquin, Endellion, Fal- 

 mouth 



Dermatolithon pustulatum, Fosl. Fal- 

 mouth, Penzance 



macrocarpum, Fosl., f. Laminariae, Fosl. 



Fowey, Padstow 



Choreonema Thureti, Schm. Lizard 

 Corallina squamata, Ellis. Fowey, Fal- 

 mouth, Lizard, Penzance 



*mediterranea, Aresch. Fowey, Prid- 



mouth, Padstow, Falmouth, Penzance, 

 H. 2 



rubens, Ellis 



var. corniculata, Hauck. Looe, Fowey, 

 Padstow, Falmouth, Penzance 



FRESHWATER ALGJE 



Under this heading systematic algologists usually include the algae 

 that are not found in sea water, whether they are met with on land, or 

 on trees, or in streams and ponds. Those which are found in brackish 

 water are sometimes classed under freshwater algas and sometimes under 

 marine algas. Unfortunately the classification and nomenclature adopted 

 in different works vary considerably, and whilst it is necessary to keep 

 as nearly as possible up to date so far as general classification is concerned, 

 yet the identification of species by their synonymy is of considerable 

 importance when consulting old records. On this account the general 

 classification here adopted is chiefly that of Engler and Prantl, Die Nat- 

 urlichen Pjlanzen-familien, and for the specific names, De Toni's Sylloge 

 Algarum, and for the Cyanophycese, Bornet and Flahault's Nostocacees 

 Heterocystees and Gomont's Monographic des Oscillariees. 



In these works the synonymy is excellent, and there is no difficulty 

 in tracing out the species in old records by means of the references 

 therein given. 



Although the freshwater alga? of the county have been investigated 



90 



