88 THE JOURNAL OF BOTANY 
has been described under the name of Herposteiron crassisetum. 
This will now stand as follows :— 
P. CRASSISETA —e (Herposteiron crassisetum West & G. 8. West 
in Trans. Linn. Soc. (Bot.) vi. p. 180, t. 17, f. 11 (1902) ). Cellule 
ramorum ree gaat aet bastenmnes vel doliformes, diametro 
af, Rao plo longiores ; ramis erectis crassis, cellulis 7-10- plo longio- 
iam. cell. ram. sepa 6°5-7°5 »; diam. cell. ram. erect. 
28- 
5 p. 
Hab. Heneratgod’ha, Ceylon. 
18. Thamniochete aculeata, sp.n. Thallus minutus, curtus, 
e cellulis 3-4 formatus; cellula basali in haptero singulo producta 3° 
cellulis intermediis (1-2) cylindricis vel subeylindricis ; cellula 
apic magna et inflata, seta brevi acuta singula subterminali 
ructa. Diam. cell. intermed. 5:5 »; diam. cell. apical. 10-18 p; 
hg 25-81 
Baheh ‘Lough, Co. Galway, Ireland. Also from near 
Balallan, Lewis, Outer Hebrides. 
his genus de first established by Gay (in Bull. Soc. Bot. 
France, tom. xl. 1898, p. elxxvii; cum fig. xylogr. 2) to include a 
small epiphytic member of the Chat tophoracea, consisting of very 
ew cells, which he named Thamniochete Huberi 
The plants we have found from the western hilly portions of 
Connemara and the Hebrides constitute another —- of the 
The British species is characterized by its fewer cells, 
suiiybe on tie thallus of Gleotrichia 
hamniochete is the smallest and most imperfectly developed of 
the genera of the Chetophoracea 
19. GoneRosiRa VIRIDIS Kiitz. Stereococcus viridis Kitz. in 
Linnxa, 1883, p. 879. G. Selerococcus Kiitz. in Phycol. gener. 
1843, p. 288; Rabenh. Flor. Europ. Algar. 1868, iii. p. 3887. 
Diam. cell. 77-12 fs 
. On rocks, near Tremethick, Corn 
This plant is known elsewhere in the British’ Islands from rocks 
on the shores of Lough Beg, Co. Londonderry, Ireland. fr. tte 
& G. §. 7 in Trans. Roy. Irish Acad. xxxii. sect. B, part 1 
1902, p. 1 
20. NELLA Gortzet Schmidle in Engl. Bot. Jahrbiich. 
at 1901, p. 958, t t. v. £1, 2. Cra rass. cell. plerumque 5-5-6 (usque 
ad 7°7) »; crass. cell. termin 
Hab. Cowside Back, iia near Ametiff, W. Yorkshire ; epiphytic 
on Spirogyra sp. 
This small alga is a member of the family pe 2 on 
account of the ineompletely septate nature of the thallus 
segment of which contains several nuclei. It has been stesinty 
found only in Equatorial Africa. 
21. Movcrotia eexatinosa Wittr. in Wittr. & Nordst. Alg. 
