206 Rhodora [AuGusT 
following notes: * Hab. ad King George's Sound, Harvey.” .“ Inter 
algas exsiccatas Australasicas sub no, 279 B haec a Harveyo distri- 
buta fuit, nomine D. revo/utae inscripta....” 
The next reference of importance is by Kjellman, Algae of the 
Arctic Sea, p. 135, 1883, wheré the author refers to Montagne, but 
says “In order to distinguish the present species, D. denticulata 
Mont., from D. denticulata Harvey, I have changed the name of 
denticulata for that of Montagnei." Here arises a double confusion ; 
Montagne's species antedates Harvey's by six years; and there is a 
D. Montagneana J. Ag., Sp. Alg., Vol. II, p. 492, 1876, seven years 
before Kjellman's D. Montagnei. Rosenvinge, Grønlands Havalger, 
p. 802, 1893, recognizes this last difficulty, but merely — “Ikke 
at forvexle med D. Montagneana J. Ag. Sp. p. 492.” In J.G. 
Agardh’s final revision of the Delesseriaceae, Sp. Alg., Vol. III, part 
3, 1898, the genus De/esseria is broken up and the species distributed 
among several new genera.  Montagne's plant becomes Pteridium 
spinulosum, p. 225; with the note, * Ad hanc Speciem refero tum 
specimina Ruprechtiana, tum specimina sub nomine D. Montagnet 
mihi ex Ungava Bay missa, tum alia sub nomine D. Montagne: var. 
angustifolia Rosenv. quae comparare licuit.” ^ Harvey's plant 
becomes Heterodoxia denticulata, p. 131; Harvey’s D. revoluta = 
Agardh's D. denticulata becomes Hypoglossum denticulatum, p. 188 ; 
and Agardh's D. Montagneana is Apoglossum Montagneanum, p. 194. 
If these new genera are accepted, Heterodoxia denticulata and Apoglos- 
sum Montagneanum seem to be satisfactory; it is not quite so sure 
about Hypoglossum denticulatum, as Kützing's species of that name, 
a synonym for 2. denticulata Mont., dates from 1866. There seems 
to be some doubt, however, as to the validity of the new genera, and 
it i$ perhaps safer to retain the old genus for the present, with the 
name D. denticulata Mont. to represent the species occurring from 
Maine northward. New names will then be needed both for the 
West Australian plant and for the plant from King George's Sound. 
Ruopora, however, is hardly a suitable place for their re-christening. 
The references for the plant in question may be summed up as 
follows : 
DELESSERIA DENTICULATA Montagne, Ann. Sci. Nat., Series 3, Vol. XII, 
p. 290, 1850; Sylloge Cryptogamarum, p. 408, 1856. Harvey, Nereis Bor.- 
Am. part 2, p. 94,1853. Collins, Holden & Setchell, Phyc. Bor.-Am., No. 995, 
too D. alata var. denticulata Mont. Ann. Sci. Nat., Series 3, Bot. Vol. XI, 
p.62,1849. Not D. denticulata Harv., Tr. R. I. Acad., Vol. XXII, p. 548, 1855 ; 
