1III. ILG \l OF BERMUDA. 



41 



Family TRENTEPOHLIACEAE. 



TrENTEPOHLI \ Martins. 



*T. aurea (L.) Martius, 1817, p. 351; Collins, 1909, p. 316; B 

 aureus Linnaeus, 1753, p. 1168. Common <>n shaded cliffs all < 

 the islands, forming little orange-colored tufts of soft filaments, some- 

 times confluent and covering considerable spaces. 



Family ( LADOPHORACEAE. 

 Chaetomorpiia Kiitzing. 



Filaments under 100 ^ diam. 



Filaments over 100 M diam. 

 2. Filaments attached, not over 25 n diam. 

 2. Filaments not attached, 40-70 n diam. 



Filaments 500 u diam. or more. 



Filaments 400 M diam. or less. 

 4. Light green; filaments 200-250 m chain. 

 4. Dark green; filaments 125-175 m chain. 



3. 







2 







:; 



1. 



C. 



minima 



2. 



c. 



gracilis 



5 



. c 



. crassa 



4 



4. 



c 



Liiiuin 



C. 



brachygona 



1. C. mimima sp. nov.; Plate I, figs. 5-7; P. B.-A., Xo. 2007. 

 Filamentis disco affixis, cylindricis vel plus minusve clavatis, 10-20 /u 

 diam., ad nodos interduni constrictis; cellulis 2-4 diam. longis, 

 membrana crassa distinete laminata; zoosporis (?) in quavis cellula 

 formatis, per foramine laterale liberatis. 



Filaments attached by a di>k, cylindrical or more or less clavate, 

 10-20 n diam., nodes sometimes constricted; cells 2-4 diam. long, 

 wall distinctly laminate; zoospores (?) formed in any cell, escaping 

 by a lateral opening in the wall. On fronds of C odium, Cladophora etc. 



The smallest species yet known in this genus; C. californica ( !ollins, 

 F. B.-A., Xo. 664 was the smallest heretofore known in the 1 attached 

 state, and its filaments average about twice the diameter of the present 

 species; as regards length, the contrast i- even more striking, a- in ('. 

 californica the fronds reach a length of a decimeter, while in ('. minium 

 5 mm. is the longest observed. It was first found growing on the 

 rounded ends of the utricles of Codium tomentosum, sometimes singly, 

 sometimes many individuals close together. Being quite imper- 



