68 
PACIFIC SCIENCE, Vol. XXII, January 1968 
These specimens are labeled P. ferulacea "in 
J. G.’s handwriting, followed by a mark of 
exclamation,” leading Dr. Snogerup to con- 
clude that they must perhaps be regarded as the 
type collection. Photographs of these specimens 
sent by Dr. Snogerup and one loose duplicate 
(40186) of "Vera Cruz Liebmann” represent 
plants with prominent leading axes especially in 
the upper parts, very unlike the divaricately 
branched Hawaiian specimens. 
If one accepts the view of Boergesen (1918: 
277) that P. breviarticulata Harvey is to be 
identified with P. ferulacea J. G. Agardh, the 
figures of the former given by Harvey (1853: 
Tab. XVIB) represent a plant with strictly erect 
habit, with distinct percurrent axes and alternate 
branching, forming a penicillate tuft very unlike 
the Hawaiian plant. Furthermore, Boergesen 
gives the impression that the specimens he 
identified as P. ferulacea are saxicolous, form- 
ing "together with Caulerpa . . . and other 
algae, low compact patches.” The Hawaiian 
plants always seem to be epiphytic. 
Finally, judging by descriptions and figure 
by Boergesen (1918:280, fig. 279) of the 
spermatangial branches of plants he identified 
as P. ferulacea, and also by spermatangial 
branches of various specimens from Florida 
and elsewhere in the southeastern United States, 
the writer is led to the conclusion that the male 
reproductive structures of the Hawaiian plants 
are short and stout (Fig. 2 F) as are those of 
P. ferulacea, but differ from the latter in several 
respects: (1) they are considerably larger and 
more ovoid in form, rather than cylindrical; 
(2) there are fewer at a given branch tip, 
usually 2-3 present at any given time; (3) the 
sterile tip is much smaller, is neither globular 
nor thick-walled, and does not consist of two 
cells as is the case in P. ferulacea as figured by 
Boergesen. 
Polysiphonia her pa sp. nov. 
Lophosiphonia bermudensis Dawson, 1956: 
59, fig. 65 ; non Lophosiphonia bermuden- 
sis Collins and Hervey (1917:126), which 
is Dipterosiphonia rigens (Schousb.) Falk. 
Figs. 1 1, 2 G 
Chiefly prostrate algae, with the prostrate 
branches mostly 100— 140ji in diameter and with 
segments 0. 6-1.0 diameter long, attached by 
rhizoids which are cut off by a cross-wall from 
the proximal end or center of the pericentral 
cells and which commonly have multicellular 
discoid tips; erect branches to 3 mm high and 
90p in diameter, with segments mostly about 
0.5 diameter long, arising cicatrigenously, com- 
monly at intervals of 4 segments and frequently 
in alternating pairs, one on either side of the 
prostrate branch, with one segment between 
members of a pair and 4 segments between cor- 
responding members of successive pairs; erect 
branches with short segments, mostly un- 
branched or with one or two erect laterals from 
near the base; young branches at first strongly 
arched toward the prostrate branch; pericentral 
cells 4, ecorticate; trichoblasts on erect branches 
one per segment in J spiral sequence, mostly 
not well developed but occasionally to 1.3 mm 
and with 4-5 dichotomies, quickly deciduous, 
leaving relatively large scar-cells and commonly 
prominent wall scars at the point of abscission ; 
trichoblasts on prostrate branches represented by 
exogenous primordia ("scar cells”) only, most 
of which divide to form 3 or 4 small cells 
(branch primordia), from which the cicatri- 
genous branches later arise; reproductive struc- 
tures not observed. 
Algae praecipue prostratae, ramis prostratis ple- 
rumque 100-1 4 Op, diam., segments plerumque bre- 
vioribus quam lata, per rhizoidea, a cellulis peri- 
centralibus per dissepimentum separata, et cacumina 
multicellularia vulgo habentia, affixae; rami erecti ad 
3 mm alt. et 90\i diam., segmentis plerumque ca. 0.5 
plo breviores quam lata, vulgo non ramosis, inter- 
vallis 4 segmentorum cicatrigenose et plerumque 
binatim enascentibus; cellulae peri centrales 4, ecorti- 
catae; trichoblastae in ramis erectis, una in unoquoque 
segmento, in \ spira, mox deciduae; cellulae-cicatri ces 
relative magnae, eae in cellulis prostratis ad cellulas 
parvas ternas quaternasve formandas plerumque divi- 
sae; structurae reproductivae non observatae. 
type: D. 11857.2, abundant in tufts on dead 
coral on the sea reef near Otetou, Raroia Atoll, 
Tuamotu Archipelago, legit M. S. Doty and 
Jan Newhouse, Aug. 21, 1952. It is represented 
by glucose microslide mounts and abundant 
fluid-preserved material. 
ADDITIONAL COLLECTIONS: HAWAIIAN IS- 
LANDS — D. 19643DA, on a mollusc shell, 
dredged 8-10 fa, east side of Barber’s Point, 
