EU A STRUM. 53 



Forma secta Turn. (PI. XXXVIII, fig. 30.) 



E. binale forma d. secta Turn. Freshw. Alg. E. India, 1893, p. 81, t. 10, 

 f. 35, 39, 47; t. 11, f. 5. [= E. binale forma c. lobis basalibus sinuato- 

 bilobulatis Lund. Desni. Suec. 1871, p. 23; E. binale Ealfs, I.e. t. 14, 

 f. Sc.] 



Basal ano-les of semicells truncato-retuse (or sinuate- 



O v 



bilobulate). 



Length 20-28 p. ; breadth 16-21 p.; breadth of 

 isthmus 6-8 p.. 



EXGLAXD. Westmoreland ! TT. and N. Yorks ! 

 Lancashire ! Surrey ! Hants ! Devon ! Cornwall ! 



WALES. Capel Curig and Llyn-y-cwm-fynon, Car- 

 narvonshire ! 



SCOTLAND. General! (Roy fy Bissett). 



IRELAND. General, but scarce ! 



Geogr. Distribution. Norway. Sweden. India. 



Forma hians West. (PL XXXVIII, fig. 33.) 



E. binale forma hians West, Alg. W. Ireland, 1892, p. 140, t, 20, f. 14 

 West & G-. S. West, Obs. on Conj. 1898, t. 4, f. 38 ; Alga-fl. Yorks. 1900, 

 p. 64. 



Basal angles of semicells subacute, obliquely truncate 

 towards the sinus. 



Length 11-16 /*; breadth 10-12-5 p.; breadth of 

 isthmus 2*5-3'5 /A; thickness 6-7 ft. 



ENGLAND. Near Cockley Beck, Lancashire ! Keigh- 

 ley Moor, W. Yorks ! Skip with Common, E. Yorks ! 

 Dartmoor, Devon ! 



IRELAND. Ballynahinch and Lakes near Recess, 

 G-alway ! Near Foxford, Mayo ! 



Geogr. Distribution. Germany. Ceylon. 



Forma Gutwinskii Schmidle. (PI. XXXVIII, 



figs. 31, 32.) 



E. binale forma, Gutw. Flor. G-lon. Okolic Lwowa, 1891, p. 73, t. 3, f. 25. 

 E. binale forma GHitwinskii Schmidle, Alg. Geb. Oberrheins, 1894, p. 552 ; 



Lappniark Slisswasseralgen, 1898, p. 44. 

 E. binale forma, Schmidle, Beitr. Al^enfl. Eheineb. 11. Sclrwarzwald. 1895, 



p. 79, t. 1, f. 13, 14. 



