"ү со зао үче Y 
RHODYMENIA 125 
locality and date; brought up on a fish-hook from six fathoms, 
Bay of Pacasmayo, Mar. 14, 1907, Coker 123 p.p. (fragments); 
“іп the surf, red, common," Lobos de Tierra, Apr. 2, 1907, Coker 
149a, “dredged in about 5 fathoms,” Bay of Sechura, Арг. 8, 
1907, Coker 157 p.p. 
The best-developed specimens secured by Dr. Coker attain a 
length or height of 15-25 cm. Nos. 30 and 31 are cystocarpic; 
cystocarps scattered or aggregated on both faces and occasionally 
on the margins, conico-hemispheric or mammiform, 0.65-0.85 
mm. in diameter, not at all apiculate or coronate. 
We have not seen the type of Sphaerococcus palmettoides Bory, 
described from Paita, but from Bory's description we believe it to 
be much like Coker's 149a, which we are referring to R. corallina. 
The type of Rhodymenia corallina, like that of К. flabellifolia, 
was collected at Concepcion, Chile, by d'Urville in 1823, though 
Bory, at the time of the original publication, referred to fragments 
from Paita, Peru, as probably belonging to the same species. 
It has been reported from Callao by Humboldt, Bonpland, and 
Kunth (Nov. Gen. et Sp. Pl. 418. 1825, as Sphaerococcus Pal- 
metía) and by Montagne (Fl. Boliv. 29. 1839) and from Paita 
by Piccone (Alg. Vettor Pisani 63. 1886). 
PLATE 50. Rhodymenia corallina 
Photograph of a dried and pressed sterile specimen (Coker 29), reduced to a 
little less than three fifths of the natural dimensions. 
я PLATE 51. Rhodymenia corallina 5 
Photograph of а cystocarpic specimen (Coker зо p.p.) from liquid preservative, 
reduced to a little more than one third of the natural dimensions. 
Rhodymenia flabellifolia and R. corallina are apparently very 
distinct species, yet sterile decolorate fragments are sometimes 
difficult to determine. Rhodymenia flabellifolia has a greater 
development of the subterete stipe, axis, or "stem," which is 
almost percurrent; the plants probably stand rather rigidly erect 
when growing. In R. corallina, the subterete stipe is commonly 
and typically only 0.5-4.0 cm. long and the plants are probably 
subdecumbent, or cespitose and weakly erect, when growing; yet 
sometimes, if our conception of the species is correct, in decumbent 
encrusted forms (Coker 30 p.p.) the subterete axis and its branches 
may be much prolonged and may be almost as percurrent as in К. 
