234 T11K FLORA OF HALIFAX. 



C. affinis, Kiitz. Ogden Clough, Crimsworth Dean. 



C. lancelota, (Ehrnb.) Kirchn. Binnroyd Clough, High 



Greenwood, Ogden Clough, Colden Clough ! 

 C. cymbiformis, (Ki'itz.) Breb. Ogden Clough. Hardcastle ! 

 Encyonema turgidum, (Greg.) Grun. Tag Lock, Catty-well ! 

 E. ventricosum, (Ag.) Kiitz. Coley. 

 E. gracile, Rabh. Cragg Vale. 



NAVICULEiE. 



Stauroneis anceps, Ehrnb. Halifax. 



Navicula major, Kiitz. (Pinnularia major, Rabh.) Swill Hill, 



Ogden Clough. Barkisland ! Norland ! Gibb Slack 



Moor, Wadsworth ! 

 N. viridis. Kutz. Cragg Vale. Park Gate ! 

 N. Hilseana, Janisch. Cragg Vale. 

 N. Brebissonii, Kiitz. Cragg Vale. 

 N. appendiculata, (Ag.) Kiitz. Cragg Vale. 

 N. mesolepta, Ehrnb. Cragg Vale. 

 N. peregrina, (Ehrnb.) Kiitz. Coley. 

 N. radiosa, Kiitz. Greetland. 



N. angustata, W. Sm. Greetland, Ogden Clough, Cr. Dn. 

 N. rhynchocephala, Kiitz- Greetland. 

 N. Semen, Ehrnb. Sundew swamp, Norland Moor ! 

 N. dicephala, Ehrnb. Colden CI. ! Halifax, Og. CI., Cr. Va. 

 N. elliptica, Kiitz. Ogden Clough ! Among filamentous alga' 



on stone in stream, Luddenden Dean ; among Cylindvos- 



permum macvospermuni, Bn. CI. ! On moss, Barkisland ; 



Colden Clough ! Hardcastle — H. Watevwofth. 

 N. exilis, (Kiitz.) Grim. Coley, Hebden Bridge. Colden CI. ! 

 N. pupula, Kiitz. Ogden Clough. 

 Yanheurckia rhomboides, (Ehrnb.) Breb. Greetland. 



Among moss, Catty Well ; Sundew swamp, Norland 



Moor ; in swamp, Erringden Moor ; Barkisland ! 



Var. saxonica, (Rabh.) Ogden Clough, Cragg Vale. 

 Pleurosigma Spencerii, (Quekett; W. Sm. Fixby. 



GOMPHONEMEiE. 



Gomphonema acuminatum, Ehrnb. Wellside, Ogden ! 



G. tenellum, Kiitz. Ogden Clough. 



G. intricatum, Kiitz. Ogden Clough. In well, Wellhead ! 



Var. Yibrio, (Ehrnb.) Ogden Clough, Crimsworth Dean. 

 G. parvulum, Kiitz. On moss, Catty Well ! 

 Rhoicosphenia curvata, (Kiitz.) Grim. Attached by short, 

 simple stalk to filament of (Edogonium, Tag Lock ! 



