106 THE ALGA-FLORA OF CAMBRIDGESHIRE. 
18. Saccarpo (Pier’ Andrea). Chromotaxia, seu nomenclator 
colorum polyglottus additis speciminibus coloratis ad. usum 
Botanicorum et Zoologorum. Patavii, 1891. 8vo. 
19. Pmussury (J. H.). On the colour tee Res of flowers. 
Coulter’s Botanical Gazette, xix. (1894), 1 
With symbols for notation. 
THE ALGA-FLORA OF CAMBRIDGESHIRE. 
By G. 8. West, B.A., A.R.C.S. 
Scholar of St. John’s College, Cambridge. 
(Piates 394-396.) 
(Continued from p. 58.) 
Fam. ConFERVACES. 
42. Conrerva sompycina Ag. 8. Sheep’s Green, Cambridge ; 
Harlton; Wimpole Park. 5. Burwell ; Chippenham Fen. Ros- 
well Pits, Ely; Sutton. 8. Guyhirne. 
Forma minor Wille. 3. Harlton. 5. Burwell; Wicken Fen. 
= C. arrinis Kiitz. 8. Sheep’s Green, Cambridge: July, 1898. 
. Microspora FLoccosa (Vauch.) Thur. 3. Sheep’s Green, 
Ounbitdge, 
45. Opmiocytium cocHLearE (Hichw.) A. Br. 8. Sheep’s Green, 
Cambridge; Harlton; Hardwick. 5. Burwell; Wicken Fen. 6. 
Roswell Pits, Ely. 7. Near March. 
The removal of the genus Ophiocytium (inclusive of Sciadium) 
from the Protococcoides need hardly occasion any surprise, as its 
position in the subfamily sag Te gee of that order was obviously 
one of convenience rather than racy; a few remarks are 
necessary, however, concerning its aul position. Quite recently, 
Knut Bohlin, in a most intere sting pa per entitled ‘ Studier 6fver 
nagra sligten af Kans ppen Confervales ’ (Bih. till Sv. Vet. -Akad. 
Handl. 1 1897, Ba. 23, Afd. iii. no. 8), has conclusively demonstrated, 
by an exhaustive study of the structure of the cell-wall, the close 
affinity which exists between the Benes Ophiocytium ne Conferva. 
Many of the earlier stages in the deve elopment of Ophiocytium are 
also strictly comparable to correspondingly early stages in the 
n ii, t, 
Akad. Férh. 1881, no. 8, &, 1s. 1. 15, 17, 18, 1-26. ‘T also ‘figure 
a few stages (Pl. 394, figs. 18-22) i in thé development of Opkiveytivm 
whic ator be compared with the illustrations already mentione 
iF peek a a: A. Br. 8. Wimpole Park. 5. Chip- 
siuteeti Fen. 8. 
_ 47. O. Arsuscuna ee r.) Rabenh. Syn. Sciadium Arbuscula 
A, Br. 8. Sheep’s Green, Cambridge. 6. Roswell Pits, El 
