288 MESSRS. W. AND G. 8. WEST ON THE 
Fam. NosrocEz. 
*42. Nosroc MUSCORUM, Agardh, Dispos. Algar. Suec. 1812, 
p. 44; Cooke, Brit. Freshw. Alg. p. 230, t. 90. ff. 12-18. 
The specimens approached var. tenax, Thuret, in the thickness 
of the trichomes and in the small size of the spores. 
Crass. trich. 3-3°5 u; crass. heterocyst. 5'5 p; crass. spor. 
6-7:5 p. 
Hab. Growing on sides of road, Fort Charlotte, St. Vincent. 
No. 208. 
43. N. HUMIFUSUM, Carm. ex Harvey in Sm. Engl. Flora, 1833, 
v. p. 399; Kuetz. Spec. Algar. p. 301; Kabenh. Flor. Europ. 
Algar. ài. p. 183. 
Hab. In stream, Wotten Waven, Dominica. No. 1249. 
Sub-ord. HowocxsTEE. 
Fam. VAGINARIER. 
*44. PORPHYROSIPHON NOTARISIT, Auetz. Tab. Phyc. ii. 1850-2, 
p. 7, t. 27. f. i; West 4 @. S. West, “ Welw. Afric. Freshw. 
Alg., Journ. Bot. xxxv. 1897, p. 271. 
Crass. fil. 20-23 u; crass. Dich, 14 p. 
Hab. On the sides of road, Fort Charlotte, St. Vincent. 
No. 203. 
45. SCHIZOTHRIX CUSPIDATA, West 4 G. S. West in Journ. 
Roy. Micr. Soc. 1896, p. 164.—Symploca cuspidata, West, “Alg. 
West Ind." Journ. Linn. Koc., Bot. vol. xxx. (1894) p. 273, 
t. 16. ff. 1-7. 
Var. LUTEO-FUSCA, West $ G. S. West.—Symploca cuspidata 
var. luteo-fusca, West, Le (1894) p. 274. 
Hab. On banks, Morne Micotrin, Dominica. No. 1109.—On 
roadside near Roseau Lake (2700 ft.) Dominica. No. 1160.— 
On bank near summit, Couliabon (3700 ft.), Dominica. No. 1899. 
Fam. LxxaBtrEx. 
“46. LyNGBYA MAJUSCULA, Harv. in Sm. Engl. Fl. 1833, v, 
p. 370; Gomont, Monogr. des Oscillariées, pp. 151-6, t. 3. 
ff. 3-4, 
