CoLLIns AND Howe: SPECIES OF HALYMENIA 179 
part, obconic or clavate-truncate and 2-5 times higher than 
broad, their outer walls gelatinous or deliquescent; tetrasporangia 
(protoplasts) 14-26 » X 12-14 4, the spores decussately paired; 
cystocarps unknown. 
Bermupa: W. G. Farlow, 1881; Green Bay, W. S. Wadsworth, 
February, 1890; Castle Harbor, near Tucker’s Town, F. S. Collins 
7075, April 25, 1912; Walsingham, A. B. Hervey, January 15, 1915 
(Phyc. Bor.-Am. 2099). 
Type: Walsingham, A. B. Hervey, January 15, 1915, in herb. 
F. S. Collins. 
Halymenia pseudofloresia differs from both H. Floresia and H. 
Gelinaria in its normally deeper red color, in the firmer sub- 
coriaceous texture and verruculose surface of its older fronds, 
and in the mostly clavate-truncate and much elongate superficial 
cells of the older parts of its frond. From H. Floresia, which 
apparently occurs in southern Florida and the West Indies, as 
well as in the Mediterranean and adjacent regions, it differs also 
in the less deeply dissected frond, with the teeth or ultimate 
lobules mostly acuminate-deltoid from a broad base rather than 
mostly lanceolate, ligulate, or ciliiform from a somewhat con- 
stricted base. Lanceolate outgrowths from a narrowed base are 
of occasional occurrence, but such seem to have more the habit 
and nature of proliferations than of normal lobes and lobules. 
From Halymenia Gelinaria, H. pseudofloresia differs furthermore 
in its more lobed and dissected and more obviously pinnate frond 
and in its firmer, less distinctly filamentous cortex. 
The older parts of Halymenia pseudofloresia, at least as shown 
in the Walsingham specimens collected by Hervey, are infested 
by four or five kinds of endophytic algae, and we have sometimes 
suspected that the small verrucae referred to in our description 
as occurring on the old fronds might be caused by irritation due 
to their presence. However, most of these verruculae appear 
to be free from any endophyte and we have thought best to treat 
parts of the old frond. We have not 
them as more or less normal 
rface 
observed any tendency of these verrucae of the general su 
to develop into proliferations, even though the marginal pro- 
liferations commonly spring from somewhat similar outgrowths. 
These surface verruculae are dense, dark red, and about 0.2- 
