10 TRANSACTIONS OF THE [Szss. LXXIII. 
Geographical distribution — Brazil. 
Note.—From its small size this species is easily overlooked when 
growing amongst other alge.—E. M. H. 
Dictyota Bartayresiana, Lamour.—Found growing upon 
stones upon the seashore, Dominica, B.W.L; Barbadoes, 
Dickie: Guadeloupe, Mazé; St. Thomas, Young; Danish 
West Indian Islands, Hohenack (Meeresalgen, Nos. 427, 
428); Vera Cruz, Liebman; Florida, Melvill; Bermuda, 
Kemp; “Challenger.” 
| Note.—This species bears considerable resemblance to several other 
species, and when sterile is recognised by the acuminate character of 
the young fronds and their subdivaricate branching.—E. M. H. 
GIGARTIN ACE. 
Gymnogongrus tenuis, J. Ag—Found growing upon 
rolled stones upon the seashore, Dominica, B.W.L; Guade- 
loupe, Mazé; on the shores of the Mexican Republic, 
Liebman. Agardh gives it as Gulf of Mexico, and on the 
islands of St. Thomas and Martinique. 
Gymnogongrus tenuis, J. Ag., var. angusta, J. Ag—In 
this variety the branchlets are longer. Found growing on 
rolled stones upon the seashore, Dominica, B.W.L 
Note.—It is mentioned by Mazé and Schraum as oceurring in four 
localities in Guadeloupe, but it has apparently not been noticed by many 
algologists, as it is comparatively rare in herbaria.—E. M. H. 
Gymnogougrus tenuis, J. Ag., var. brevifolia, Holmes.— 
Growth: Spreading over the surface of rolled stones upon 
the sea beach, Dominica, B.W.L. 
This variety has very short branchlets and does not 
appear to have been previously noticed. 
Note.—The plant is evidently a very variable one, and further observa- 
tion may show that these varieties are merely forms running one into 
the other.—E. M. H. 
Acanthophora Thier, Lamour ? 
Geographical distribution—It is recorded from the 
shores of North America, West Indies, Mexico, Brazil, the 
Nicobar Islands, and Biarritz in Europe. 
Note.—The specimen consisted of a fragment mixed with other algz, 
and it was not possible to determine the species with certainty —E. M. H. 
