A HISTORY OF CORNWALL 



CYANOPHYCE^: RHODOPHYCE.E 



Gongrosira viridis, Kiltz. Tremethtck Chantransia Scotica, Kiitz. Mousehole 



Hapalosiphon Hibernicus, West & G. S. Sacheria mammillosa, Sirod. Penzance 

 West. Sennen 



In Mr. Marquand's list no definite localities are given, and where 

 records are not obtainable elsewhere, W.C. indicates that his list is the 

 authority for their record in this part of the county. The species re- 

 corded by him as rare are indicated by an asterisk. E.G. and N.C. 

 indicate East and North Cornwall respectively. 



Scbizotbrix Cresswellii is only found elsewhere at Sidmouth in Devon. 

 Cosmarium commisurale is found nowhere else in the British Islands 

 so abundantly as in Cornwall, and C. quadrimammillatum has not been 

 observed elsewhere in Britain. The genus Centrosphcera is new to Britain, 

 and Euastropsis Richterl has previously only been found in Germany and 

 Norway ; Mougeotia ge/atinosa, elsewhere in Wales and Scotland, in one 

 locality in each ; Genicularia Spirotcenia is the rarest of all desmids ; 

 Gongrosira viridis is known only elsewhere in the British Isles from 

 Lough Beg, Londonderry. 



CYANOPHYCEJE 

 CHROOCOCCACEJE 



Chroococcus turgidus, N2g. W.C. 

 Gloeocapsa *coracina, Ktitz. Carbis Bay 



livida, Carm. Carbis Bay 



quaternata, Ktitz. 

 Aphanocapsa virescens, Rab. Carbis Bay 

 Aphanothece microscopica, Nag. 

 Microcystis marginata, Kirchn. 

 Coelosphasrium Kutzingianum, Nag. Car- 

 bis Bay 



Merismopedium glaucum, Nag. Carbis Bay 



OsCILLATORIACE-ffi 



Schizothrix *Cresswellii, Harv. Mousehole 



*rubra, Menegh. Mousehole 



*tinctoria, Gom. Newbridge near 



Penzance 



Microcoleus vaginatus, Gom. W.C. 

 Plectonema Tomasinianum, Born. 

 Symploca muscorum, Gom. 



Lyngbya ochracea, Thur. 



Phormidium autumnale, Gom. 



inundatum, Kiltz. W.C. 



papyrinum, Bory. 

 Oscillatoria amphibia, C. Ag. W.C. 



limosa, C. Ag. W.C. 



nigra, Vauch. 



princeps, Vauch. 



splendida, Grev. 



subfusca, Vauch. inq. W.C. 



tenuis, C. Ag. W.C. 



Beggiatoa leptomitiformis, Trevis. (?) W.C. 

 Spirulina *oscillarioides, Turp. inq. 



RlVULARIACEJE 



Isactis *plana, Harv. Mousehole 

 Rivularia dura, Ktitz. W.C. 



*granulifera, Carm. Carbis Bay 

 Gloeotrichia Pisum, Thur. W.C. 



SIROSIPHONACE.S 



Gongrosira viridis, Ktitz. Tremethick 

 *Hapalosiphon Hibernicus, West & G. S. 



West. Sennen 

 Stigonema minutum, Hass. W.C. 



ocellatum, Thur. W.C. 



panniforme, Gom. 



ScYTONEMACE-ffi 



Scytonema Hoffmanni, C. Ag. W.C. 



Myochrous, C. Ag. W.C. 

 Tolypothrix lanata, Wartm. W.C. 



NOSTOCACE^E 



Nostoc *caeruleum, Lyngb. Chy-an-hal 

 Moor 



microscopicum, Carm. W.C. 



muscorum, C. Ag. 



verrucosum, Vauch. 

 Anabaena catenula, Born. & Flah. W.C. 



Flos-aquae, Breb. W.C. 



oscillarioides, Bory. Chy-an-hal Moor 



torulosa, Lagerh. 



variabilis, Ktltz. Hayle 

 Cylindrospermum stagnale, Born. & Flah. 



W.C. 



BACILLARIACE-fl: (Diatoms) 



NAVICULACE-ffi 



Navicula aestiva, Donk. W.C. 



amphisbaena, Bory. 



aspera, Ehr. 



bacillum, Ehr. 



biceps, Ehr. 



borealis, Ktltz. 



cancellata, Donk. 



Cluthensis, Greg. 



crabro, Kiltz. 



var. pandura, Rabenh. 



cruciformis, Donk. 



f)2 



