F. Borgesen: Rhodophyceæ of the Danish W. Indies. 207 



not seen any wall or pore so it is evidently nothing else -but 

 an accidental swelling. 



According to Kylin's detailed examination of Gr. corallina 

 the present species, with regard to the development of the pro- 

 carp etc., differs somewhat from Gr. corallina making a revision 

 desirable. As pointed out by Kylin the chief difference is that 

 the cell supporting the carpogonial branch in Gr. corallina cuts 

 off another cell, this being the auxiliary one, while in Gr. globifera 

 no such cell is cut off, the supporting cell itself acting as the 

 auxiliary cell. Unfortunately my material is now unfit for more 

 detailed examination having been kept in formalin for more 

 than ten years, but my figure of the procarp, published in 1910 

 (1. c, fig. 20£'), seems to agree precisely with the figures in Lewis's 

 treatise and seems to verify his description. But, of course, an 

 examination of fresh material would be desirable. 



Fig. 193 / shows a young cystocarp in which the peculiar 

 fusion of the cells in the centre of the female branchlet has taken 

 place. From the large placental cell, resulting from this fusion, 

 two sporogenous lobes are developed. The figure shows the 

 involucral cells as the enlarged end-cells of the two-celled branch- 

 lets issued from the basal cell in the procarp. 



Before the examination of Lewis the development of the 

 cystocarp in Griffithsia globifera has been examined by Farlow 

 (1. c), Spalding^) and Miss A. Smith ^). 



Fig. 20 D in my earlier description of the plant shows one 

 of the large terminal cells of the male plant with the characteri- 

 stic cap-like disc of antheridia at the summit of the cell. Farlow 

 is the first who has described it and given a figure of it ; later 

 it has also been mentioned by Lewis. 



In the West Indies I have found this species fully developed 

 with tetraspores, antheridia and cystocarps in the months of 

 February arid March. 



All the specimens were collected in rather deep sea in depths 

 from 5 — 15 fathoms with the exception of a single specimen 

 gathered during my first visit to the West Indies in 1892, It 

 was found in the environs of Christianssted, St. Croix, most 

 probably washed ashore. 



1) Spalding, V. M., Development of the sporocarp of Griffithsia Borne- 



tiana (Proced. Am. Assoc. Adv. Science 39; 1890). 

 *) Smith, A. A., The development of the cystocarp of Griffithsia Borne- 



tiana. Bot. Gazette, XXII 1896. 



