26 COLLINS AND HERVEY. 



*4. S. MYOCHROUS Agardh ex Bornet & Flahault, 1887, p. 104; 

 Kutzing, 1850-52, p. 7, PI. XXV, fig. Ill; P. B.-A., No. 1902. On 

 perpendicular cliff, Paget, Aug., Collins; and common in company 

 with Calothrix species etc. on rocks between tides. This species has 

 a very wide distribution as a plant of rocks etc., dripping with fresh 

 water, but in Bermuda it is commonly found with distinctly marine 

 species, in mats on flat rocks in the litoral zone. 



*5. S. CRUSTACEUM Agardh ex Bornet & Flahault, 1887, p. 106. 

 On sand near Mangrove Creek, Hamilton, Jan., Farlow. 



ToLYPOTHRix Kutzing. 



*T. TENUIS Kutzing ex Bornet & Flahault, 1887, p. 122; Kutzing, 

 1850-52, p. 9, PI. XXXI, fig. II. Among Oedogonium, in ditch in 

 Devonshire Marsh, April, Collins. 



Hassallia Berkeley. 



*H. BYSSOiDEA Hassall ex Bornet & Flahault, 1887, p. 116. On 

 bark of Junipems bermudiana, rather common. 



Family STIGONEMACEAE Hassall. 

 Mastigocoleus Lagerheim. 



M. TEST ARUM Lagerheim ex Bornet & Flahault, 1887, p. 54; 1889, 

 p. CLXII, PI. X, fig. 4. In dead shells of mollusks, with Gomontia 

 etc. 



Hapalosiphon Nageli. 



*H. intricatus W. & G. S. West, 1895, p. 271, PL XV, figs. 16-28; 

 P. B.-A., No. 1855. In ditch in Devonshire Marsh, April, Dec, 

 Collins. 



Stigonema Agardh. 



*S. informe Kutzing ex Bornet & Flahault, 1887, p. 75; Kutzing, 

 1850-1852, p. 15, PI. XXXVIII, fig. 3. Feb., H. Kennedy in Farlow 

 herbarium. 



Fischerella Gomont. 



*F. ambigua Gomont, 1895, p. 49, PI. III. On stone wall, Jan., 

 Farlow. 



