1903 | Collins,— Notes on Algae 205 
it appears that this name cannot stand, and a recapitulation of the 
facts in regard to the matter will show curious instances of unneces- 
sary names given, one can hardly say why, by botanists of high rank. 
The earliest name appears to be Delesseria alata var. denticulata, 
given by Montagne in Ann. Sci. Nat., Series 3, Bot., Vol. XI, p. 62, 
1849. In Vol. XII, p. 290, 1850, Montagne raised it to the rank of 
a species, D. denticulata, A description of it appears under the same 
name in Montagne, Sylloge Cryptogamarum, p. 408, 1856. The 
specimens were all from Labrador, collected by Lamare-Picquot. 
In part 2 of the Nereis Boreali-Americana, p. 94, 1853, Harvey 
uses the same name, referring to the Labrador specimens in herb. 
Montagne, and giving an additional locality, * Brandy Pot Island, 
River de Loup, Mr. Allom. (v. s. in herb. T. C. D.),” the last clause 
indicating that his description, which is fuller than Montagne's, was 
from specimens in the herbarium of Trinity College, Dublin, of which 
he was keeper. With this in mind, it is certainly surprising to find 
Harvey, two years later, describing a new D. denticulata from 
Australia in Trans. Royal Irish Acad., Vol. XXII, p. 548; distribut- 
ing specimens of the same in Alg. Austr. Exsicc., No. 274; and 
illustrating the same in the Phycologia Australica, Pl. CCXLIV, in 
1862; nowhere mentioning at all Montagne's species of the same 
name, which he had fully recognized in the Nereis Boreali-Americana. 
Kützing, Tab. Phyc., Vol. XVI, p. 6, Pl. XLV, 1866, retains the 
specific name for Montagne's plant, but with a new generic name, as 
Hypoglossum denticulatum. This appears to be the last appearance 
of Montagne's plant under his specific name; J. G. Agardh accepts 
Harvey's plant, Sp. Alg., Vol. III, p. 495, 1876, at p. 483 incident- 
ally mentioning Montagne's species under D. spinulosa (J. Ag. 
mscr. with synonym D. Beeringiana var. spinulosa Rupr., Alg. 
Ochotsk., p. 243, and note * D. denticulata Mont. Syll. p. 408 cum 
D. Beeringiana spinulosa Rupr., sec. spec. a Montagneo comparatum 
identica dicitur" ^ Montagne certainly considered them identical, 
and naturally treated Ruprecht's name as a synonym of his own, 
published seven years earlier. In Ruprecht's description he says 
“Diese form (sPzzuw/osa) steht gewiss sehr nahe der D. alata var. 
denticulata Montagne in Ann. Sci. Nat., XI (1849) p. 62, aus Lab- 
rador...” 
In Analecta Algologica, Cont. II, p. 66, 1894, Agardh proceeds to 
complicate the situation by describing a third D. denticulata, with the 
