110 GIGARTINACEAE 
gested the specific name disciplinalis, and this may therefore be 
considered the technical “type” of the species. The thallus of 
the original specimens of 5. disciplinalis is, on the whole, thinner 
and less rigid than that of Gymnogongrus furcellatus, the branching 
is more flabellate, and there is often a tendency to tri- or poly- 
chotomy and to a pronounced widening under the forkings. But 
all of these characters appear to us to be rather unstable, We find 
по cystocarps іп Bory’s original material and none іп Сокегз | 
plants, but it is a fact of possible significance that three of Bory's 
specimens (the type from Cape Horn, (һе d'Urville specimen from 
Concepcion, and one of the Lamouroux specimens), as well as the 
two Coker numbers, bear an Actinoccocus, which doubtless ac- 
counts for the "gongyles" described by Bory. None of the 
specimens that we have referred to С. furcellatus seems to сату ` 
the Actinococcus. Coker’s 95 p.p. differs from Bory’s originals 
in its thicker more rigid thallus (often 1 mm. or more thick), yet | 
departs from typical С. furcellatus апа approaches typical С. 
disciplinalis in the broadening under the principal forkings, the ` 
tendency to polychotomy, the more rounded or wide-angled axils, | 
etc. Gymnogongrus disciplinalis has been attributed to Peru by ` 
J. Agardh,* who in his latest writings on the genus seems, rather 
curiously, to restrict the species to Peru, and by Piccone.t 
PLATE 43. Gymnogongrus disciplinalis and Actinococcus mollis 
A photograph of Coker's 95 p.p. (from liquid preservative), natural size. 
AHNFELTIA Fr. Corp. Fl. Suec. 1: 310. 1835 
AHNFELTIA DURVILLAEI (Bory) J. Ag. Sp. Alg. 2: 313. 1851; 
3': 207. 1876 | 
Polyides Durvillaei Bory, Voy. Coquille, Bot. Crypt. 138. 1828. 
Gracilaria concinna Mont. Voy. Bonite, Bot. Crypt. 100. 1846. 
Not С. concinna (В. Br.) ]. Ag. Alg. Med. et Adriat. 104- 
1842. | 
Ahnfeltia concinna Auct. (at least, as far as most Peruvian speci- 
mens are concerned). Possibly not А. concinna J. Ag. О! 
Kongl. Vet.-Akad. Forh. 4: 12. 1847. [Hawaiian.] 
— 
* Sp. Alg. 31: 210, 211. 1876. . 
t Alg. Vettor Pisani бі. 1886. 
