110 THE ALGA-FLORA OF CAMBRIDGESHIRE. 
et paullo abbreviatis; zygosporis sublentiformibus, in altera 
posite orbicularibus altera late ellipticis, cellulas Euler 
on complentibus. Crass. cell. pees: 45°5-49 w; diam. zygosp. 
7 “86 , p; erass. cell. fruct. cire. 95 p. 
1. Ditch by the Botanical seg: Cambridge: June, 1897, 
intermingled with S. bellis. 8. Sheep’s Green, Cambridge: Aug. 
‘shire 
fordshire, is placed by De Toni in his Sylloge Algarum, p. 776, under 
the section ‘ species incertissime, auctorum fide huc relate,” and 
on p. 777 of the same work he says ‘A el. Cooke rite omissa.”’ In 
e with him, as th 
ds more characteristic than S. pellucida, and Cooke was 
sometimes being arranged in a very lax spiral manner, and at other 
times being quite straight. The nucleus is a narrowly elliptical 
body placed transversely across one centre of the cell, and is clearly 
visible in living specimens ; in fact, I know of no species of this 
genus in which it can be so readil nae without the use of staining 
reagents. The peculiarly inflated portion of the fructiferous (female) 
cells is a noteworthy character, and, so far as I am aware, is pos- 
sessed by only one other species of Spirogyra, viz. S. sph@rospora 
Hirn in Acta Societatis pro Fauna et Flora Fennica, xi. (1895), 
no. 10, p. 10,0 © &. 
72. S. BELLIS quer s.) Cleve. 1. In the ditch by the Botanical 
in Cambridge: June, 1897, intermingled with S. pellucida 
ass 
3. 8. Cine EVILLEANA ie) Kiitz. 8. Sheep’s Green, Cam- 
bridge ; Hardwick, in pond 
Fam. Desmipiace®. 
74. Gonatozycon Raztrsu De Bar 5. Chippenham 
amongst Utricularia vulgaris; Wicken Fen, amongst Myr iophyitut 
_ spicatum. 6. Roswell Pits, Ely. 
75. G. Bresissonn De Dac, 6. Roswell Pits, Ely. 
. Kinanant (Arch.) Rabenh. S Page Be ive Cambridge: 
in pond amongst Spirogyra sp., July, 18 
*77. Mesorantum Kramstar Lemmerm. in Forschungsberichte 
aus der Biol. Stat. zu Plén, iv. 1896, 115-117, c. fig. 8-10. Long. 
cell. 42-77 p; lat. 9-105 p. 5. Chippenham Fen, in small pools 
amongst Utricularia vulgaris: Aug. 1898. This species, the most 
elongate of the genus, was discovered by tien in Aug. 
1895, in small abs on the “ Riesengebirge,” between Bohemia and 
