274 MR. W. WEST ON SOME FRESHWATER 
yel interdum stratis parallelis formatis, in ambitu sepe sub- 
rugosis, apice angustioribus et sepe ramosis. 
Diam. trich. (s. vag.) 1°9-2°3 w; crass. trich. c. vag. 13°5-25 p. 
Hab. On trees, summit of Trois Pitons (4500 ft.), Dominica. 
Nos. 903 and 904. 
Var. LUTEOFUSCA, DOV. var. 
Var. ferruginea, strato denso, 1-2 mm. alto, fasciculis brevior- 
ibus, 4-6 mm. (interdum 10 mm.) altis, articulis crassioribus. 
Crass. trich. 2°5-3°5  ; crass. vag. 15-40 p. 
This variety also often has two, three, ur more threads in one 
sheath. 
Hab. On rocks, Roseau Valley (1000-2000 ft.), Dominica. 
(27-6-92.) No. 24.—On bark, windward road to lake (1000- 
2000 ft.), Dominica. (25-8-92.) Nos. 513 and 514.—Also on the 
ground, mostly in old Diablotia holes, Morne Anglais (2300 ft.). 
(15-7-92.) No. 498. Thicker and coarser sheath. 
The specimens preserved in liquid strongly reminded one 
of Sphagnum cuspidatum; they occurred amongst mosses in 
penicillate tufts which were suberuginose towards the apices, 
the sheaths, but uot the trichomes, here becoming narrower. 
Many of the sheaths in the stratum were without trichomes ; 
and in consequence of this, and the broader sheaths at the base, 
the stratum was paler than the erect fasciculi. 
32. Lynapya PENICILLATA, Kuetz. (Botan. Zeit. 1847, p. 194.) 
[Leibleinia penicillata, Kuetz. Species Algar.; Tabule phycolog. i. 
p- 46, t. 81. f. ii.] 
Crass. fil. 3-3°5 p. 
Hab. On bed of stream in crater of Grande Soufri¢re, Dominica. 
No. 881. 
33. L. suprie, West. (Aly. of the Eng. Lake Distr. in Journ. 
Roy. Micr. Soc. Dec. 1892, p. 741, pl. x. f. 58.) 
Crass, fil. 1°4 pe. 
Hab. With the preceding. 
34. PHoRMIDIUM LYNG@BYACEUM, Kuetz. (Phycol. gener. 
p- 194; Tabule phycolog. p. 33, t. 46. f. iii; Rabh. Fl. Europ. 
Alg. ii. p. 124.) 
Crass. fil. 3°5-4 p. 
Hab. On damp wall of dam, Sharp’s River, St. Vincent. 
No. 477.—On old wall, Dominica. (1-8-92.) No. 473. 
The cells were about as long as broad (sometimes a little longer). 
