EUASTIU'M. 49 



Kent ! Hants (zygospores from Xew Forest) ! 

 (Rolfs). Devon! Cornwall! (Ralfs). 



WALES. Generally distributed ! 



i/ 



SCOTLAND. Generally distributed zygospores at 

 Sle \vdrum, Aberdeen (Roy fy Bi*sdt). Outer Hebrides ! 

 Orkneys ! Shetlands ! 



IKELAXD.- -Common. 



Gfnf^'. <litri1.n.iti'.nt. France. Germany. Galicia and 

 Austria. Hungary. Sicily. Xorway. Sweden. Den- 

 mark. Bornliolm. Finland. X., Central, and S. Russia. 

 Faeroes. Xova Zembla. Spitzbergen. Greenland. 

 Siberia, Japan. India (var.). Xew Zealand (var.) 

 Madagascar (var.). E. and Central Africa. Azores. 

 United States. West Indies. Brazil. Argentina. 



E. elegant is one of the most widely-distributed British 

 species of the genus. It can always be recognised by its 

 broadly-rounded apices with a deep median incision, and by 

 the truncate-retuse basal angles. It is a small smooth species 

 with a well-marked central protuberance, which is usually 

 split into three warts. 



The zygospore occurs frequently and is covered with simple, 

 blunt spines. 



Var. pseudelegans (Turn.) nob. (PI. XXXVIII, figs. 



22, 23.) 



Ec.astrii.m pseudelegans Turn. New and Bare Desui. 1885, p. 935, t. 15, 

 f. 8 ; De Toni, Syll. Alg. 1889, p. 1102 ; West, Alg. X. Wales, 1890, 

 p. 287. 



Helierella pseudelegans Kuntze, Eevis. gen. plant, 1891, p. 899. 



Basal angles of semicells broadly rounded, with a 

 number of depressed granules within the margins and 

 near the centre of the semicells. 



Length 40 p.; breadth 25' 5 p,; breadth of isthmus 7 p.. 



WALES. Capel Curig, Carnarvonshire. 



Geogr. Distribution. United States. 



Var. Novse Semlise Wille. (PL XXXVIII, figs. 24, 25.) 



E. elegans subsp. Novae Semlix Wille, Ferskv. Alg. Xov. Semlj. 1879, p. 32, 

 t. 12, f. 8. 



Cells slightly larger than in the type ; semicells with 



4 



