108 GIGARTINACEAE 
La Punta, region of Callao, December, 1906, Coker 23 p.p. 
(" green"—a short plant of compact congested habit, somewhat re- 
sembling Kützing's figure of Chondrus violaceus brevicornis—Tab. 
Phyc. 17: pl. 51. f. f., though shorter and more congested; bears 
abortive or diseased cystocarps) ; also, in beach drift, same locality, 
Jan. 25, 1907, Coker 39 ("green," cystocarpic, near Kützing's 
Chondrus violaceus brevicornis); Pescadores Islands, region of 
Ancón, Feb. 12, 1907, Coker 79 (“ green,” cystocarpic); in beach 
drift, same locality and date, Coker 96; "brought up on a fish- 
hook from 6 fathoms,” Bay of Pacasmayo, March 14, 1907, Coker 
123 p.p. (cystocarpic); on surf-washed rocks, Chincha Islands, 
June 18, 1907, Coker 193 b.p. (fragment). 
None of the specimens collected by Dr. Coker exactly matches 
the plants originally brought from Peru by Humboldt. Most of 
them, as already indicated above, resemble the forms figured by 
Kützing under Chondrus violaceus. Тһе species varies greatly 
as to the size of the plants, the regularity and frequency of the 
dichotomies, the presence or absence of proliferations, etc. 
Through the courtesy of Mme. Weber-van Bosse we have been 
able to study the structure of the plants lying in the Kiitzing ` 
herbarium under the names Chondrus violaceus апа C. concinnus | 
and we can discover no way of distinguishing them specifically ` 
from the Humboldtian specimens of Sphaerococcus furcellatus in 
the Agardh herbarium and the herbarium of the Muséum d'His- 
toire Naturelle of Paris. We have included Chondrus bidens 
Kütz. and C. coarctatus Kütz. in the synonymy on the strength of. 
the similarity exhibited by Kützing's figures. ]. Agardh, while 
maintaining G. furcellatus as a valid species, cited these names.of 
Kiitzing’s in the synonymy of Gymnogongrus vermicularis (Turn.)- 
The Fucus vermicularis of Turner antedates the Sphaerococcus 
furcellatus of Agardh and Turner's specific name might be taken 
up for these Peruvian plants if one were convinced that it was 
really applicable to them and if one were not troubled by the 
previous use of the name Fucus vermicularis in another sense by 
Gmelin. As a matter of fact, however, the source of Turner's | 
Е. vermicularis was wholly unknown to its describer, but it was 
probably South African. The apparently original cystocarpic 
specimen in the herbarium of the Royal Gardens at Kew 18 
