288 messes, w. and g. s. west on the 



Fam. Nostoceje. 



*42. Nostoc mdscoettm, Agardh, Disjpos. Algar. Suec. 1S12, 

 p. 44; CooJce, Brit. Freshw. Alg. p. 230, t. 90. ff. 12-18. 



The specimens approached var. tenaoc, Thuret, in the thickness 

 of the trichomes and in the small size of the spores. 



Crass, trich. 3-35 fx ; crass, heterocyst. 5*5 fi; crass, spor. 

 6-7-5 li. 



Hab. Growing on sides of road, Fort Charlotte, St. Vincent. 

 No. 203. 



43. N. HTJMirtrsTJM, Carm. ex Harvey in Sm. Engl. Flora, 1833, 

 v. p. 399 ; Kuetz. Spec. Algar. p. 301 j Babenli. Flor. Eurojj. 

 Algar. ii. p. 183. 



Hob. In stream, "Wotten AVaven, Dominica. No. 1249. 



Sub-Ord. HoMOCYSTEiE. 



Earn. Vaginaeiej;. 



*44. Poephyeosiphon NotaeisiIj/iw^.?. Tab. Flujc. ii. 1S50-2, 

 p. 7, t. 27. f. i. ; West Sf G. S. West, " Welw. Ajric. Freshw. 

 Alg." Joitrn. Bot. xxxv. 1897, p. 271. 



Crass, fil. 20-23 fx ; crass, trich. 14 fi. 



Bab. On the sides of road, Fort Charlotte, St. Vincent. 

 No. 203. 



45. ScnizoTHEix cuspidata, West ty G. S. West in Journ. 

 Boy. Micr. Soc. 189G, p. 104. Symploca cuspidal a. J Test, u Alg. 

 West Ind." Journ. Linn. >Soc., Bot. vol. xxx. (1894) p. 273, 

 t. 16. if. 1-7. 



A'ar. luteo-fusca, West <$f G. S. West. Symploca cuspidata 

 var. luteo-fusca, West, I. c. (1894) p. 274. 



Ilab. On banks, Morne Micotrin, Dominica. No. 1109. On 

 roadside near Roseau Lake (2700 ft.), Dominica. No. 11G0. 

 On bank near summit, Couliabon (3700 ft.), Dominica. No. 1899. 



Fam. Lyngbye.f. 



*46. Lyngbya majuscula, llarv. in Snu Engl. FI. 1833, y. 

 p. 370 ; Gomont, Monogr. des Oscillarices, pp. 151-6, t. 3. 

 ff. 3-4. 



