a aan ме Пробели аи палат Науан Е ee a Mao QS SSS 
GIGARTINA 103 
manifestly the Chondroclonium versicolor of Kiitzing. In its nar- 
rowest pinnate forms it sometimes suggests slightly the larger 
broader conditions of Grateloupia filicina, a resemblance that is 
heightened by its customary dark green color. 
Since the publication of the results of the voyage of La Co- 
quille, Gigartina Chauvinii has been recorded from Peru by 
Montagne, Kiitzing, J. Agardh, Piccone, Pilger, and perhaps 
other writers. It appears to have been collected at Callao by the 
Wilkes Expedition (in 1839), according to a specimen in the 
Columbia College Herbarium, under the name G. Chamissoi, though 
it is not mentioned in Bailey and Harvey’s report on the algae of 
that expedition. 
PLATE 38. Gigartina Chauvinii 
Photograph of a part of a cystocarpic plant (from hn preservative—Coker 34), 
reduced to about five sixths of the natural dimension 
Gigartina glomerata sp. nov. 
pu d 3-5 cm. high, rather firm and rigid (in pre- 
5 ; 
usually 1-3 t mes subdichotomous below, otherwise naked for 
I-2.5 cm. in езе and median parts, bearing toward their apices 
at first subdistichous, later irregularly polystichous, short, simple 
or compound branches; the simple branches mammiform or sub- 
ovoid; the compound branches irregularly and densely short- 
ramose, or longer (5—8 mm.) and 2-5 times closely, often somewhat 
palmately or pedately subdichotomous or cervicornous, sometimes 
a little inflated towards the apex with a subrotate or coronate 
verticil of short branchlets, or very irregularly fasciculate-ramose, 
the ultimate ramuli mostly short-digitiform, patent or su 
divaricate, obtuse or acute, the penultimate ramuli commonly 
narrowed towards the base; branching of sterile plants irregularly 
distichous above, at length irregular in all planes, the ultimate 
ramuli mostly acuminate, some of the lower ovoid or short- 
digitiform and somewhat constricted at the base; cystocarps 
aggregated or occasionally solitary, subglobose or hemispheric, 
I-I.5 mm. in diameter, naked, variously disposed on ultimate 
ramuli, these shorter or more contracted than the sterile, the 
pericarp (inner involucre) well developed or ost wanting. 
[PLATE 39 and PLATE 40, FIGURES 1—11. 
Attached to shells of mussels on rocks, N. E. side of San 
Lorenzo Island, region of Callao, Feb. 5, 1907, Coker 55 (type— 
