THE ALGA-FLORA OF CAMBRIDGESHIRE. 298 
Sheep’s Green, Cambridge; Trumpington ; ois s Bridge ; ba 
eo —_ 5. Wicken Fen ; 2, agg Fen. 8. Guyhirn 
yes a (Kiitz.) Grun. Syn. P. lacustre W. ih 
2. Shelfo rd. 3. Ditch, St. John’s Odllege « backs,” and Barton 
-— Cambridge ; wees res 4, Histon. 7. Sutton West Fen. 
330. P. Spencern (Quekett) W. Sm. 8. Ditch, St. John’s 
College “backs,” and Sheep’s Green, Cambridge; Comberton; 
Orwell; Wimpole Park. 5. Wicken Fen. 7. Sutton West Fen. 
8. irne. 
331. P. Parxern Harrison. 7. Near March. 
332. Ampuiprora paLuDosA W. Sm. 7. In ditches near March. 
*333. A, onnata Bailey. 7. Ponds 8. of March: Aug. 1898. 
Fam. GomMPHONEME. 
GompHonema constrictum Khrenb. 2. Dernford Fen, 1 mile 
8. of "Shelford 3. Ditch, St. John’s College ‘ backs,’’ and Sheep’s 
Green, Cambridge; Comberton; aa Harlton ; Lord’s 
Bridge; Wimpole Park. 4. Girton. 5. well; Wicken Fen; 
Fordham; Chippenham Fen. 6. Roswell, Pits, Ely. 7. Sutton 
West Fen 
Var. cAPITATUM (Ehren enb.) Van Heurck. Syn. G. capitatum 
te ee Sheep’s Green, Cambridge. 6. feat Ely. 7. Sutton 
Aifsost 
5. 6. acuminatum Ehrenb. 2. Dernford Fen, 1 mile 8. of 
hat? 8. Ditch, St. John’s College ‘‘ backs,” and Sheep’s 
Green, "Oe ge; Tru umpington; Wimpole Park. 5. Wicken 
Fen; Fordham; Chipp pret 6. Roswell Pits, Ely; Sutton. 
y sects West Fen. *. Guy ne. 
Oat Paes eG . cristatum Ralfs. 3. Wimpole 
Park. oe ” Wick 
337. G. TENELLUM «ibe 3. Ditch, St. John’s College ‘‘ backs,” 
and Sheep's peter, Cambridge ; Trumpington; Coton; Comberton ; 
Harlton. 4. Girton. 5. Fordham; Chippenham Fen. 6. Near Ely. 
838. G. parvutum Kiitz. 8. Wimpole Park. 4. Girton. 7. 
Sutton ‘West F en. 8. Guyhirne. 
= supoapirata Van Heurck. 2. Dernford Fen, 1 mile S. of 
speed 
Be pemsrs Kitz. 2. Dernford Fen, 1 mile S. of Shel- 
ford. ro Wimpo 
Var. Visio prehrenb,) Van Heurck. Syn. G. Vibrio Ehrenb. 
8. Sheep’s Green, Cambridge; Coton ; Comberton: Wimpole Park. 
5. Burwell; Chippenham Fen; Wicken Fen. 6. ‘Nea rEly. This 
was very abundant from both Wicken and Chippenham Fens, and 
sporangial valves were abundant (cfr. Pl. 396, figs. 15, 16). 
340. G. ancustatrum Kiitz. 8. Wimpole Park. 5. Burwell; 
Fordham. 
841. G. GRACILE tin 3. Wimpole Park. 
Var. picHotomum (Kiitz.). Van Heurck. Syn. G. dichotomum 
Kiitz. 8. Sheep’s Green, Cambria ge. 
