112 
many — ought to quote E-alfs in Br. Desm. as au¬ 
thor of Micr. furcata. 
Euastrum. About my reason for accepting the 
name oblongum Grev. 1833 instead of Eu. Pecten Eh- 
renb. 1831 cfr Hedwigia 1893 p. 150! 
Cosm. (Eu.) crassum Bréb. in litt, was described 
by Meneghini in Syn. Desm. 1840 all too shortly 
for identification of the variety. It was described 
by Balfs in Ann. Nat. Hist. 1844 p. 190 t. 7 f. 1, 
as Eu. Pelta (Corda), which figure seems nearest to 
var. appendiculatum Bréb. 1856. The same var. is 
taken as a by Kütz. im Phyc. germ. 1845 and Spec. 
Alg. 1849; the form, which Bréb is son and other 
authors regarded as a, seems to be identical with 
Kützing’s ”yÖ” in Phyc. germ., ß grande in Spec. 
Alg. Ralfs united these both forms in his a. 
To regard Turpin as the author of Eu. Didelta 
is imposible, because Turpin’s figures have no likeness 
to it. Of Ralfs’ figures 1844 fig. a et b were good, 
but the others belong to Eu. ansatum. F o eke 
1847 did not confound Eu. Didelta and Eu. ansatum.^ 
but gave pretty good figures of them; Ralfs 1848 
published good descriptions and figures. Cfr Hed¬ 
wigia 1893 p. 150 and Ind. Desm. p. 46. 
Eu. circulare in Brit. Desm. is collective. Archer 
separated in 1861 Ralfs’ var. ß and ö as Eu. sinu¬ 
osum ”Lenorm.’’ (”mser.” apud Ralfs) and var. y (v. 
Palf sii Bréb. 1856, non Eu. Palf sii Kütz. 1845, 
nec Rab. 1868) as Eu. Jenneri. Lundell 1871 
pointed out that Hassall’s Eu. circidare really be¬ 
longed to Eu. ansatum Ralfs. 
Ralfs ought to be quoted as author of Eu. 
hinale., because Turpin’s Heterocarpella binalis is quite 
indeterminable. — In Ann. Nat. Hist. 14, 1844, p. 
193 (t. 7 f. 7 b.) Ralfs described ß truncatum with 
nearly the same words as var. ß (”which may prove 
a distinct species”) in Brit. Desm. p. 90; but about the 
