264 THE ALGA-FLORA OF CAMBRIDGESHIRE. 
pe hemephenien). ad dissepimenta non consiricta; cellulis 
diameiro paullo brevioribus, dissepimentis distinctis et non granu- 
latis ; Pclanae reticulato eee cum granulis minutis- 
~~ numerosis. Crass. trich. 12-13 p 
n ditch parallel to Barwell ads Aug. 
Thi Species occurred in hgeeinynt is peak ite O, pro- 
sissies: and O. splendida, omen ual filaments are apparently 
quite devoid of colour, and are never attenuated at the apices, the 
apical cell being almost Soaiae The cells contain large 
vacuoles, thus causing the cell-contents to appear somewhat 
reticular. can find no species sufficiently near it to deserve 
mention. 
245. O. smwexicissima Gomont, 38. Wimpole Park. 5. Chip- 
penham Fen. 
46. O. e Ape: ao Shelford; Dernford Fen, about 
1 mile S. of Shelford, 3. Sheep's Green, Ca imbr idge; Comberton ; 
Wimpole Park. 4. Histon. 5. “Wieken Fen ; Chippenham Fen. 
6. Roswell me Ely; Sutton. 7. rch. 
247. O, ampurpia Ag. Syn Ge llige tenerrima Kitz. 3. Wim- 
Sa Park. ‘s.  Ohinasnte Fen. 7. Indi tches, March. Guy- 
248, O. sprenpipa Grey. Syn. Oscillaria leptotricha Kiitz. 5. 
Ina ditch saeralick to Burwell Loa 
*249. O. acuminata Gomont. 3. Sheep's Green, Cambridge. 
Crass. trich. 3-5-4 ». This striking species I have obtained only 
a2 » in July, 1898. It has previously been seen only from 
ee 
_ 250. Sprrunia masor Kiitz. Syn. 8. oscillarioides Kitz. Crass. 
trich, 18 p. 5. Wicken Fen. 
Fam, CHaMosIPHONIACER. 
251. Spamroconium iorustans (Grun.) Rostaf. 8. Sheep’s 
Green, Cambridge, on Vaucheria sp. and (idogonium sp. 8. 
Twenty-foot River, between March and Guyhirne, on Gidogonium 
crassipellitum. 
Order CuroococcowE2. 
Fam. Curoococcace2. 
Subfam. aa ie 
*252. Guaocnare Wrrrrocniana Lag (‘Bidrag till Sver. 
Alg.-fl.,’ Ofvers. af K. Sy. Vet.-Akad. oa 18838, no. 2, 39, t. 1 
f. 8, 4: in Nuova Notarisia, 1890, 227-281). Syn. Sanaa 
barbata sa ee 1889. 2. Dernford Fen, 1 mile 8. of Shelford. 
3. Sheep’s Green, Cambridge 
The reall contents of Sis plant are most brilliant blue-green in 
colour, and very granulose; they are the contents of a typical 
Chroococcaceous alga, and I fail to understand why some authors 
place this genus in the Chlorophycee. Dangeard (‘Mémoire sur les 
Algues,’ Le Botaniste, sér, i, fasc. 4, 1839) refers it for the time 
al 
