286 MESSRS. W. AND G. 8. WEST ON THE 
Fam. SIROSIPHONIACER. 
39. HarALOsIPHON INTRICATUS, West, “Alg. from West 
Indies,” Journ. Linn. Soc., Bot. vol. xxx. (1894) p. 271-2, t. 15. 
ff. 16-28; West & G. S. West, * Welw. Afric. Freshw. Alg.,’ 
Journ. Bot. xxxv. 1897, p. 242. 
Hab. In stream, Wotten Waven, Dominica. No. 1249. 
33. STIGONEMA HORMOIDES, Born. et Flah., * Révis. de Nostoc. 
Heterocyst.,” Ann. Sci. Nat. 7° série, Bot. vol. v. (1887) p. 69.— 
Scytonema hormoides, Kuetz. Sirosiphon brevis, Awetz. in Bot. 
Zeit. 1847, p. 196 ; Tab. Phye. ii. p. 10, t. 84. f. ii. Sirosiphon 
hormoides, Kuetz. Spec. Algar. p. 316 ; Tab. Phyc. ii. p. 10, t. 34. 
f. iv. 
Crass. fil. 10-14°5 u. 
Hab. Abundant on banks, Morne Micotrin, Dominica. No. 
1109.—On roadside and on bank, near Roseau Lake (2700 ft.), 
Dominica. Nos. 1160 and 1180.— On rocks, Castle Bruce River, 
(2000-8000 ft.), Dominica. No. 1697. 
34. S. MINUTUM, Hass. Brit. Freshw. Alg. i. p. 280, t. 67. 
ff. 3-4; Born. et Flah. l. c. pp. 72-74. 
Hab. In stream, Wotten Waven, Dominica. No. 1249. 
#35. S. OCELLATUM, Thur. in Ann. Sc. Nat. 6° ser. Bot. i. 
(1875) p. 880.—Sirosiphon ocellatus, Kuetz. Spec. Algar. p. 317 ; 
Tab. Phyc. ii. p. 11, t. 87. f. ii. 
Hab. On rocks, Castle Bruce River (2000-3000 ft.), Dominica. 
No. 1697. 
Fam. SCYTONEMACEE. 
36. MICROCHETA TENUISSIMA, West, “ Alg. West Ind.," Journ. 
Linn. Soc., Bot. vol. xxx. (1894) p. 269. 
Hab. With the preceding species. 
37. SCYTONEMA AMBIGUUM, Kuetz. Spec. Algar. p. 894; Tab. 
Phye. ii. p. 7, t. 26. f. ii. 
Crass. fil. 10:5 p; crass. trich. 277-3 u. 
Hab. On bank near summit, Couliabon (3700 ft.), Dominica. 
No. 1899. 
