120 RHODOPHYLLIDACEAE 
Solieria chordalis Harv. Ner. Вог.-Ат. 2: 121. pl. 234. 1853. 
Not J. Ag. 1842. 
Rhabdonia Coulteri Harv. Ner. Bor.-Am. 2: 154. pl. 23B. 1853. 
Cystoclonium gracilarioides Harv. Jour. Linn. Soc. 6: 171. 1862. 
Rhabdonia Вайеуі Нагу.; Kütz. Tab. Phyc. 16: 26. pl. 74. f. с, d. 
866 
1866. 
Agardhiella Coulteri Collins, Holden & Setchell, Phyc. Bor.-Am. 
333. 1897. 
In beach drift, Апсбп, Feb. 13, 1907,--а tetrasporic plant— 
Coker 94 (PLATE 47); “dredged in about five fathoms,” Bay of 
Sechura, Apr. 8, 1907,—a single sterile plant—Coker 157 Р.Р. 
The species, under the name Rhabdonia Coulteri, has been reported 
by Piccone* from the Island of San Lorenzo, near Callao; under 
the name Gigartina Gaudichaudii from Paita, by Montagne (loc. 
cit.). Trematocarpus virgatus Kütz. and Sphaerococcus tubercu- 
losus Hampe were attributed to Peru without definite locality. 
The larger of the two plants collected by Dr. Coker is sterile 
and 45 cm. long and in habit suggests some of the larger conditions 
of Gracilaria confervoides. The shorter tetrasporic plant (shown in 
our photograph—PLATE 47) is stouter and has more of the ordinary 
habit of the plant of the Atlantic coast of North America and of 
the plant of the Pacific North American coast that has long been 
known as Rhabdonia Coulteri or Agardhiella Coulteri, though 
rather recently identified with A. tenera by Setchell and Gardner. 
We have seen cystocarps of the Peruvian plant only in the type 
specimens of Trematocarpus virgatus Kütz. and Sphaerococcus 
tuberculosus Hampe, which we have examined through the courtesy 
of Mme. Weber-van Bosse, and in the type specimen of Gigartina 
Gaudichaudii Mont., for the sight of which we are indebted to the 
authorities of the Muséum d'Histoire Naturelle of Paris. The 
type of G. Gaudichaudii has been much flattened by pressure. 
The three names last mentioned now appear in the synonymy of 
А gardhiella tenera for the first time so far as we know. Тһе large 
interior cells of the thallus of the Peruvian plants average some- 
what smaller than the corresponding cells in North American speci- 
mens, their walls are rather thinner, and the medullary hyphae 
as well shown in Kützing's figure (Tab. Phyc. то: pl. 72. f. 4.), 
* Аја. Vettor Pisani 18. 1886 ee 
