528 BULLETIN OF THE BUREAU OF FISHERIES. 



This species is easily distinguished from the following one by its smaller size, its more regularly 

 dichotomous branching, and its production of hornlike branches from thje upper edges of the conceptacles. 

 It will not be mistaken for any other occurring in this region. 



This is the northern known limit of the species. 

 2. Corallina cubensis (Montagne) Kuetzing. PI. CXIII, figs. 4 and 5. 



Jania cubensis, Montagne, in Kuetzing, 18493, p. 709. 



Jania cubensis, Harvey, 1853, p. 84. 



CoraUma cubensis, Kuetzing, 1858, Bd. 8, p. 37. Pi- 77. f- II. 



Jania cubensis, De Toni, 1905, p. 1857. 



P. B.-A. No. 1500. 



Frond erect, forming dense, intricate tufts, i to 2.5 cm. tall, about 0.2 to 0.7 mm. in diameter, 

 branching dichotomous or subpinnate, branches spreading, sometimes naked, usually clothed with 

 short, fine, simple, or sometimes forked branchlets arising oppositely in two rows, branchlets sometimes 

 prolonged, segments of the frond subcylindrical below, more cuneate above; texture fragile; color dirty, 

 whitish pink. 



Florida; West Indies. 



Few fairly large tufts dredged from the coral reef offshore, Beaufort, N. C., August, 1914, and July 

 to August, 1915. 



This species is easily distinguished from the preceding by its larger size, its more pinnate branching, 

 and its opposite branchlets in two rows. 



This is the northern known limit of the species. 



Undetermined species. I 



A few species have been found in quantities or condition insufficient for determination. One of 

 these (No. i, PI. CXII, fig. 5) seems deserving of comment. This is a red alga with an upright thallus, 

 6.5 cm. tall, shortly stipitate and attached by a small disk; it is flat and thin, being 4 to 13 mm. wide, 

 irregularly branched and bearing minute proliferations from the margins and from the wider apices ; 

 the structure closely resembles that of Halymeniafloridana, having the "stellate ganglia ' ' in subepidermal 

 view as found in that species; the texture is thin membranaceous, the color brownish red; no fruit is 

 present. This specimen seems to be closely related to Halymenia floridana, but because of the differ- 

 ence in form and color and the absence of fruit, it has seemed best to keep it separate from that species. 



* SUMMARY OK ALGAL FLORA. 



