202 



we find the following description: "Frondes filiformes, articulees, 

 monosiphoniees, de couleur rose carmine se conservant parfaite- 

 ment en herbier" and for the variety: "Fronde filiforme, articulee, 

 monosiphoniee, beaucoup plus longue et plus rigide que 1'espece 

 type, de coloration rose pale". These descriptions are very poor, 

 and any exact determination by means of them is excluded. There- 

 fore it has been of much value to me, owing to the kindness of 

 Mr. PAUL HARIOT in Paris, to be able to study an original speci- 

 men belonging to the Museum d'histoire naturelle. This plant, 

 growing upon Galaxaura, in nearly every respect agreed with 

 mine. It had the same horizontal, creeping filaments fixed to the 

 host plant with similar rhizoids as in my plant, and from these 

 creeping filaments the erect ones grow up between those of the 

 host plant. But while the erect filaments in my plants are only 

 slightly branched and, as a rule, only in their upper part, the 

 filaments in the type specimen are freely branched from near 

 their base upwards. 



As mentioned above my specimens had only tetrasporangia, 

 and this was also the case with all the plants found on specimens 

 of Eucidaris tribuloides collected by Dr. TH. MORTENSEN, who 

 most kindly placed his material at my disposal. 



This species is found in deeper water only, at a depth of 

 abouth 15 fathoms. It had ripe tetrasporangia in the month of 

 March. 



St. Jan: in the sea to the north of this island. 

 Geogr. Distrib. : West Indies. 



Subfam. 2. Griffithsieee. 

 Griffithsia C. Ag. 



1. Grifflthsia globifera (Harv.) J. Ag. 



AGARDH, J., Epicrisis, 1876, p. 67. DE TONI, Sylloge Algarum, vol. IV, 

 p. 1280. BORGESEN, F., Some new or little known West Indian Florideaa II 

 (Bot. Tidsskrift, vol.30, 1910, p. 204). 



Griffithsia corallina? var. globifera Harvey, Nereis Bor.-Am., part II, 

 p. 228, tab. XXXV A. 



Griffithsia globulifera (Harv. in litt.) in KUTZING, Tabulae Phycologicae, 

 1862, vol. XII, p. 10, tab. 30. 



Griffithsia Bornetiana Farlow, The marine Algae of New England, p. 131, 

 pi. X, fig. 4, pi. XI, figs. 3 and 5. 



As to the specific name I refer to my remarks in the paper 

 quoted above. 



