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CORALLINA 179 
(Darwin no. 2151) may "serve for the type of the species." 
Under these circumstances Darwin's plant rather than Gay's 
must probably be considered the technical type of C. chilensis. 
We have seen Gay's specimens but not Darwin's. Gay's are 
densely cespitose, 1.5-2.5 cm. high, rather irregularly 1–2-ртпате; 
the segments are 0.25-0.83 mm. broad, are mostly subterete or 
truncate-obconic, or somewhat flattened and occasionally twice 
as broad at the distal end as at the proximal; the specimens are 
sterile or with very young conceptacles. Тһе plants are smaller 
and less regularly pinnate than that figured by Kützing as Coral- 
Ипа officinalis chilensis. 
Corallina officinalis collabens var. nov. 
Cespitose, 1-4 mm. high, densely 2-3-pinnate, lightly calcified; 
main axes 0.6-1.0 mm. broad; segments near base subterete, often 
more or less rugose on drying, the median and upper segments 
mostly flattened, vertebriform or short-truncate-obconic, rarely 
twice as broad distally as proximally, on drying mostly collabent, 
sulcate, canaliculate, or marginate on one or both faces; terminal 
segments cuneate-spatulate, flabelliform, fusiform, digitiform, ог 
occasionally filiform, commonly lobed or palmatifid, sometimes 
bipalmatifid. 
On surf-washed rocks, Chincha Islands, June 18, 1907, Coker 
104 p.p.; іп same locality and habitat, July 13, 1908, Coker 402 p.p. 
This variety is remarkable for its often flabelliform deeply 
palmatifid or even bipalmatifid terminal segments and its slight 
calcification, which gives most of the segments a collapsed, mar- 
ginate, sulcate, or rugose appearance on drying. It is doubtless 
allied to C. officinalis spathulifera (Kiitz.) Ardiss., but cannot well 
be identified with that variety. Possibly it is nearer to Corallina 
palmaia Kiitz., but it is probably not Corallina palmata ЕП. & 
Soland. 
Amphiroá setacea Kiitz. (Sp. Alg. 700. 1849; Tab. Phyc. 8: 
19. pl. 40. f. а-4. 1858) was described as coming from Peru. It 
is cited by De-Toni in the synonymy of Amphiroa fragilissima. 
We fiad no Amphiroa among Dr. Coker's specimens. 
Amphiroa pacifica Kiitz. (Tab. Phyc. 8: 20. pl. 43. f. а, b. 
1858) also was described from Peru and apparently noching has 
been added to the knowledge of it since its publication by Kiitzing. 
