FLORA OF ALDERXEY. 269 



Rhaphidium faleatum, tab. Water-trough in Reutcr's Valley, abun- 

 dant ; mostly solitary cells. 



ProtoCOCCUS Viridis, Ag. On tree-trunks in the Terrace. On the ground, 

 Crabbie Bay. 



*Chloroeoeeum humieolum, Bab. Mauney Quarry. 

 Seenedesmus ObtuSUS, Meg. Frequent in some of the water-troughs. 

 The character that the cells are ' ' remote from one another " is by no 

 means constant. 

 *S. aeutUS, Meg. Plentiful in the water-trough at Trois Vaux. 

 S. quadricauda, Breb. Common. In some pools the var. ecornis, Ehr., is 

 more plentiful than the type. 



Pediastrum Boryanum, Meneg. Rather common in the pool in Mauney 



quarry. 

 P. elliptieum, Hass. Mauney quarry pool, rare. 

 *Charaeium Sieboldi, Br. Growing plentifully on Stigeoclonium protenmm 



in the pond by Rose Farm. 

 *C. tenue, Herm. Very abundant on filaments of Cladophora glomerata in the 

 Rose Farm pond. 

 Zygnema erueiatum, Vauch. In a roadside puddle at Corbelets Bay. 

 *Spirogyra nitida, Kiltz. Marshy pool, Trois Vaux. 

 *S. mipabilis, Kiltz. Old quarry pool below Fort Essex, fruiting abundantly. 



This is the plant of Petit' s monograph. 

 *S. varians, Kiltz. Old quarry, Clanque Bay. Abundantly fruiting at Val 

 du Sud. 

 S. portiealis, Clev. Marsh on Clanque cliffs, fruiting. Water-trough near 

 Essex House, abundantly in fruit. 

 *SirOgonium Stietieum, Kiltz. Marsh at the head of Val du Sud, 

 fruiting. 

 Mesocarpus sp. I have found more than one species belonging to this 

 genus in Alderney, but in the absence of fruit it was not possible to 

 determine them. 

 VaUCheria SessiliS, Vauch. LongyPond. 

 *V. Dillwynii, Ag. On moist streamlet banks in Reuter's Valley. 



Cladophora glomerata, Kiltz. Quarry pool, Clanque Bay. Spring on 

 the cliffs near La Chue. Pond by Rose Farm. 



*(Edogonium Rothii, Brings. Quarry pool below Fort Essex. 



*0. pluviale, Nordst. Same locality as last species. 



*0. eapillare, Kiltz. Quarry pool opposite Corbelets Bay. 



*Ulothrix variabilis, Kiltz. Abundant ill quarry pools on the Becquet 

 Cliffs and below Fort Essex. 



*U. parietina, Kiltz. At the base of the wall of the old churchyard. 



Chroolepus aureus, Kiltz. Growing on Barmelia in the old quarry below 



Fort Essex. 



Stigeoclonium tenue, Ag. In a water-trough, Tolval. 



S. protensum, Kutz. Water-trough at Trois Vaux. Pond by Rose Farm. 



*Draparnaldia glomerata, Ag. In the water-trough at Trois Vaux, 

 scarce. 



*D. plumosa, Ag. Plentiful and fine in a water-trough between Rochers 

 and New Town. 



*Chsetophora pisiformis, Ag. On the sides of a water-trough on the cliffs 

 below the old mill. 



