54 THE ALGA-FLORA OF CAMBRIDGESHIRE. 
4. Cottenham; 5. Burwell; 6. Ely; 7. Chatteris; 8. Wisbeach. 
The fat two are the least productive, the Cambridge area being a 
particularly barren : 
The county is by no means well investigated ; those Cidogonia- 
ces and Zygnemacee pita I have been unable to obtain in proper 
fruiting condition (and there are many of them) are not recorded, 
and there are whole districts, such as Wisbeach and Whittlesey, 
om which no collections have been made. Yet, notwithstanding 
these and other defects, I hope this paper will help to fill up one of 
those gaps in the alga-flora of England, the knowledge of which is 
essential before the singular distribution of these small plants can 
be adequately understood. 
Class FLORIDEA. 
am. eer oo 
sa ANSIA cHALYBEA (Lyngb.) Fries. 8. Sheep’s Green, 
prone kt Frid, 1898; growing on Anbiasigiini riparium at the 
mill-rac¢ 
Class CHLOROPHYCEZL. 
Order Conrervoiwex HetrrocaMe. 
Fam. CotnocH#Tacks. 
2. Conzoca#Te scutata Bréb. Generally epiphytic on aquatic 
phanerogamous plants, and ory abundant, though easily over- 
looked. 3. Hardwick; Wimpole Park. 6. Ros well Pits, Ely. 
7. In ponds near cea ae 8. on ponds, ar attached to 
Tee dichoto 
ii Pid ringsh. Rare, 5. Pools, Chippenham Fen, 
senate to ie: the sanaeneon stems of Phragmites communis, 8. In 
Eee Guyhirne, attached to mage es 
. APHAN spite REPENS Berth. 38. Sheep’s Green, Cambridge; 
Lord? s Bridge. 5. Fordham. 6. Roswell Pits, Ely. The bristles 
of Aphanochate Berth. are of a simple natur or at the base, 
and not septate; the chlorophyll masses ne par tal. 
*5. A. Pitosissmma Schmidle, ‘ Beitrige zur Algend. des spar: 
= und des ecm Hed dwiyia, Bd. xxx rin 5 (sep. s 
g: ell. 19 »; altit. cire. 9- 10 x . Wimpo 
Park, attached to Gidogonium sp. 
Fam. Cipogonracez. 
Buisocumte sEssitis Wittr. ‘Om Gotl. och Ol. Sdtv. -Alg.,’ 
Bih. till K. Sv. Vet.-Akad. Handl. Bd. 1, no. 1, 18, t. i. f.2. Forms 
with large oogonia. 5. Wicken Fen: Aug. 1898. Ciesaiks cell. veget. 
19-23 p altit. 4- plo wee crass. = 69-70 w; altit. 59-63 p; 
crass. naman. 11-13 p; altit. 
llipsospora, sp.n. (Pl. 394, ii 1,2). Oogoniis magnis, 
depresso- “pidbonl! sub setis termin alibus sitis ; 3 episporio levi ; 
roomie ento cellularum suffultoriarum in ests — harum 
; nannandribus bicellularibus in parte superiori oogoniarum 
poe Bet oe multe breviori quam oogoniis, elicln hata (stipite) 
* 
Bae olen Be ohn hs aoe ara 
