WEST: ADDITIONS TO FRESHWATER ALG. 247 
Staurastrum dejectum Ralfs. Malham Tarn; Ribblehead. 
*FormMa punctata. Membrana distincte punctata. Adel Bog. 
*Staurastrum brevispinum Bréb. Long. 35—40p; lat. 
30—34p; lat. isthm. 15—18p. Malham Tarn. 
Staurastrum cuspidatum Bréb. *Var. maximum nov. var. 
Var. multum major quam forma typica, spinis robustioribus 
et isthmo latiore. Long. 39—43,; lat. sine spin. 25—30p; 
lat. cum spin. 56—62,; lat. isthm. 9—10p. Malham Tarn. 
*Staurastrum lunatum Ralfs. Long. 21; lat. 21m; lat. 
isthm. 7. Malham Tarn. 
*Staurastrum avicula Bréb. Long. 34—36); lat. sine spin. 
35—40p; lat. cum spin. 42—47,; lat. isthm. 17—19p. 
Penyghent; Malham Tarn. 
*Staurastrum aciculiferum (West) Anders. (Sver. Chloroph. I, 
p- 11, fig. 4 Syn. S. avicula Bréb. var. aciculiferum West. 
(‘ ting Ne) of N. Yorks.’, p. 293, tab. 291, fig. 12).] 
Penyghent ; Whernside. 
Staurastrum pygmzum Bréb. Malham Tarn. 
Staurastrum Aareienaancie Bréb. Rawcliffe Common; Malham 
Tarn ; 
Staurastrum sen (Bréb.) Menegh. Ribblehead ; Malham 
Tarn. 
*Staurastrum inflexum Bréb. Malham Tarn. 
Staurastrum polymorphum Bréb. Rawcliffe Common ; 
Malham Tarn 
Staurastrum gracile Ralfs. Malham Tarn. 
Staurastrum paradoxum Meyen. Ribblehead. 
Staurastrum margaritaceum Menegh. Rawcliffe Common ; 
Ribblehead. 
CLass—MULTINUCLEATE. 
OrpDER—SIPHONEZ. 
Vaucheria sessilis (Vauch.) D.C. Whernside. 
Crass—COEN OBIE. 
OrpdER—VOLVOCINE#. 
*Eudorina elegans Ehrnb. Goole. 
ORDER—PANDORINE&. 
Pandorina morum (Muller?) Bory. Goole; Askern. 
August r8qr. 
