74 THE JOURNAL OF BOTANY 
Hab. In the “ Glaux Lagoon,” Blakeney Point, Norfolk (coll. 
F. bs Oliver, 1913). 
is species occurred in ee quantity in a collection 
ee by Professor F. W. Oliver at the above-named locality. It 
scarcely requires eompatison - Wi ath other species of the genus 
because its characters are quite distinctive. The cells are cylin- 
drical with hemispherical ends, and at the anterior pole there is a 
perforated, bluntly conical wart through which the four cilia pass. 
rm, and at the edie end of the cell there isin 
speci clearly eviden ous cap, which attains a 
mae atiiet 6 the height of the eaetevated wart. The chloro- 
plast is most massive, ee leaving but little space for the 
lodgment of the nucleus. It contains a large globular Napa 
situated either in a median position or reac — the pos 
terior end of the cell. The pigment-spot, or stigma, is very con- 
spicuous, and it is located fessorally about half- Bray “between. the 
pyrenoid and the anterior end of the cell. 
Four daughter-cells arise in the mother-cell as a result of the 
formation of two obliquely longitudinal division-planes. The wa all 
of the mother-cell becomes distended, and in some cases remains 
for a relatively long time around the daughter-cells. 
Oliveri is nearest to C. obtusa Dill,* but differs in the 
cylindrical cells, with blunter extremities, in the position of the 
yrenoid, the much more massive chloroplast, and in the st 
of the as nearer the pyrenoid than the anterior end of t 
cell. The region of insertion of the cilia is also of a different 
character from that in C. obtusa. 
HLAMYDOMONAS RETICULATA Goroschankin in Bull. de la 
Soc. Impér. d. series Ferries ee Moscou, 1891, p. 30, t. 3, f. 1-9. 
Chloromonas reticulata (Gorosch.) Wille in Nyt Magazin for 
Sp abaniier ie xli. 1903, p. 150, t. 4, f. 27. 
Long. cell. 34-382; lat. cell. 30-33 p. 
Hab. ca n ponds, Breede bist esas 
are of a very broadly ellipsoidal form t the anterior end is 
large depressed wart through which the bases of the cilia saa. 
The chloroplast is parietal, much lobed and perforated. Under 
the place of insertion of the cilia it recedes from the cell-wall, and 
there is a small basin-shaped clear space in _~ two contractile 
vacuoles are situated. There are no pyrenoids, but a number of 
4. CHLAMYDOMONAS GLOBULOSA “ Zur ——— 
Lebensformen,” 1852, pp. 86, 5d. t. ia, fig. 1a. Chloromon 
ar OE any Gattung Chlamydomonas und ihre niichsten Wer- 
wena? Sant £ wiss. Botanik, xxviii. 1895, p. 340, t. 5, f£. 39-41. 
