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



313 



hand, longer, nearly cylindrical of shape; it is generally rather long, 

 I have counted 22 joints in the main axis. 



In their outward appearance the specimens found do not to 

 any great extent resemble either Wrightiella Blodgettii or W. Tuma- 

 nowiczii. They are very 

 irregularly ramified, 

 and the trichoblasts 

 are very perishable and 

 only to be found in the 

 uppermost ends of the 

 branches. The spinelike 

 branchlets are short and 

 scarcely visible. On ac- 

 count of this fact I 

 have referred my plants 

 to Wrightiella Tiimano- 

 wiczii. But, as pointed 

 out by S« HMiTz (1. c, 

 p. 222) who examined 

 original specimens of 

 both species, they are 

 very nearly related 

 and Falkenberg even 

 points out that most 

 probably the two plants 

 are nothing else but 

 different forms of the 

 same species. The fact 

 that my plant differs 

 in appearance from the 

 others may perhaps be 

 due to its occurrence in 

 deep water, suggesting 

 at the same time that 

 most probably the plant 

 is rather a plastic one. 



This plant was dredged in about 10 — 15 fathoms of water in 

 rather open sea. It had tetrasporangia in the month of March. 



St. Jan: Off Cruz Bay in the sound between this island and St. Thomas. 



Geogr. Distrib.: Florida (Key WesO, Bermuda. 



^"^ 



Fig. 317. W rightiellaT umanowiczii[Gi?iiij)^Qhv(viz. 



a, part of niain stem with spinelike branchlet 



and a trichoblast with stichidium. b, a stichidium. 



[a, about 60:1; fc, about 100:1). 



