268 THE ALGA-FLORA OF CAMBRIDGESHIRE. 
288. M. Danser Thwaites. 8. Guyhirne. 
289. Sravroneis Paa@nicenreron (Nitzsch.) Ehrenb. 3. Hard- 
wick ; Wimpole Bark. 5. Burwell; Wicken Fen; Chippenham 
Fen. 6. Near Ely. 
290. S. anceps oo 8. Sheep’s Green, Cambridge ; Wim- 
pole Park. 5. Burwell 
Var. AMPHICEPHALA (Kiitz. ) Van Heurck. 5. Chippenham Fen. 
291. S$. Leeumen Ehrenb. Pye Bar jag pee Legumen (ahve 
Rabenh. ; Stauroneis linearis W. Sm. 38. Wimpole Park. 5. 
ham 
292. NavIcuLa ae (Ehrenb.) Kiitz. Syn. Pinnularia nobilis 
Ehrenb. 38. Wim 
293. N. masor Kee Syn. Beanbag major (Kiutz.) ee 
2. Dernford Fen, 1 mile §. of Shelfor 3. Ditch, St. John’ 
ean ‘‘ backs,”’ rearcarae een 8 aes Cambridge ; (Sate 
berton; Wimpole Park. 5. Chippenham Fen. 6. Near Ely. VF 
Near March; oiteing West Fen. 8. a raaney foot River, between 
d Guyhirn 
N. viripis Kitt. Syn. Pinnularia viridis (Ehrenb.) Rabenb. 
| Bhelford. 3. Sheep’s Green, gr ee ses Wimpole Park. 
E Boreal: Chippenham Fen. 6. Sut . Near March. 
295. N. soreatis Ehrenb, ve ph ice in a oF among Oscil- 
latoria limosa, 
. N. pivercens (W. a Ralfs. Syn. Pinnularia divergens 
W. Sm. 5. Chippenham Fen 
. N. Brestssonm Kiitz. — Pinnularia Brebissonii (Kiitz.) 
Rabenh. ; P. stauroneiformis W. Sm. 7. Near March. 
3 298. N. SUBCAPITATA Greg. 3. Wirswole Park. 5. Chippenham 
en. 
299. N. appenpicunata Kiitz. 38. Orwell; Wimpole Park. 
300. ‘ MESOLEPTA Khrenb. Syn. Pinnularia mesolepta (Ehrenb.) 
. Wimpole Park. 5. Wicken Fen: a form with the 
lateral fap almost straight. 
OBLONGA pete. Syn. Pinnularia ashes be (Kiitz. ) Rabenh. 
2. Shelford. 3. Ditch, St. John’s College ‘ backs,” Camb ridge ; 
Sheep’s Green, Camnbtiaen. Wimpole Park. 5. Burwell ; Wicken 
ee é Pare Chippenham Pen: 6. Near Ely. 7. Near Mareh. 
302. N. perecrina (Ehrenb.) Kiitz. Syn. Pinnularia peregrina 
Ehrenb. 38. Ditch, St. John’s College ‘‘ backs,” Cambridge ; Wim- 
pole Park. 
*Var. Meniscutus Schum. 2. Dernford Fen, 1 ge - Be cae 
are 3. Sheep’s Green, Cambridge; Orwell. 
u 
(To be concluded.) 
