464 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



ring; in the West Indian plant, as pointed out by Collins and 

 Hervey, too, about 15 are often present. Mostly each filament 

 bears two to three whorls, but sometimes more than six whorls 

 are successively developed. The diameter of the mature tetra- 

 sporangia is about 100 ;/. 



The antheridial stands are described and figured by Aske- 

 nasy; they are formed terminally upon short pedicels of one 

 to three cells (comp. Collins and Hervey, The Algæ of Ber- 

 muda, p. Ü35). The cystocarps seem to be insufficiently known. 

 Askenasy describes, but in a very fragmentary manner, one 

 found by him and Collins and Hervey only say that "they are 

 characteristic of Griffithsia". 



The plant was gathered with tetraspores in the month of 

 January. It was found in shallow water near the shore in a rather 

 sheltered place behind the protecting coral reef. 



St. Croix: Lime Tree Bay. 



Geogr. Distrib. : Mediterranean Sea, West Indies, New Guinea, Ber- 

 muda etc. 



95. Griffithsia barbata (Engl. Bot.) Ag. 



C. Agardh, Spec. Alg., vol. II, p. 132. J. Agardh, Spec. Alg., vol. II, 

 p. 80; Epicrisis, p. 64. Kützing, Spec. Alg., p. 660; Tabul. Phycol., vol. XII, 

 tab. 24. Harvey, Phycologia Britannica, tab. 287. 



Conferva barbata Smith, Engl. Bo- 

 tany, tab. 1814. 



Of this plant I have twice 

 come across a few filaments of 

 female plants. In the one collec- 

 tion, found between some different 

 algæ gathered at Lt. Princess, 

 St. Croix, a young procarp was 

 present. It is a well known fact 

 that the procarp in this species 

 is developed terminally upon a 

 short branchlet composed of a 

 single joint. The Fig. 424 6, c 



T^- Ac,4 ^ .-^ , • I , /c -x, ^ shows a young procarp seen 

 Fig. 424. Griffithsia barbata [Smith] „ ,•«. • i t- 



Ag. a, a nearly ripe cystocarp. b from two different sides. From 



and c, a procarp seen from two op- this it is seen that the basal 



posite sides, (a, about 175:l;feand , ,, , • , 



c, about 150:1.) central cell bears two pericentral 



