GELIDIACEAE 93 
the younger parts and the bases and sinuses, where the cuticle 
persists, they have not the distinctly radio-parallel arrangement 
that is characteristic of Actinococcus. From the species of Sterro- 
colax, it differs, perhaps, even more widely. 
Certain cells, sometimes uniseptate, detached from the ends 
of the corticating filaments we have sometimes suspected to be non- 
sexual propagative bodies, but they seem to be of irregular and 
infrequent occurrence and may be nothing more than accidentally 
detached parts of exposed branchlets. 
Our Lobocolax is evidently what Montagne means by the 
“verrucae crassis sparsis (an statu morboso productis 2)” of his 
original description of its host, Prionitis decipiens. 
Cushions superficially somewhat similar to those of Lobocolax 
but smaller and less lobed occur on Peruvian specimens of Alinfeltia 
Durvillaei, under which species some further mention of them is 
made. 
PLATE 32, FIGURE А.  Lobocolax deformans 
Photograph, natural size, of thalli as shown by Coker's no. 492 p.p. (from liquid 
preservative). 
Family CHAETANGIACEAE 
Scinaia furcellata undulata (Mont.) J. Ag. (Sp. Alg. 2: 422. 
1852. Ginnania undulata Mont. Voy. Bonite, Bot. Crypt. 59. 
pl. 145. f. 3. 1844) was originally described from specimens from 
the shores of Chile and from Cobija, once in Peru, but now in 
Chile. It apparently occurs on the western coast of Mexico and 
in California and may be expected on the Peruvian shores. 
Chaetangium variolosum (Mont.) J. Ag. (Sp. Аш. 2: 461. 
1852), originally described from the Auckland Islands (Voy. Pole 
Sud, Bot. т: год. pl. то. f. 3), was considered by Montagne (Syll. 
Crypt. 431. 1856) to include the plant from Cobija (once in 
Peru, now in Chile) which he had previously (Fl. Boliv. 27. pl. 6. 
f.4. 1839) referred to Sphaerococcus fragilis Ag. 
Family GELIDIACEAE 
GELIDIUM Lamour. Essai 41. 1813 
Cornea Stackh. Mém. Soc. Imp. Nat. Moscou 2: 57, 83. 1809. 
Clavulata Stackh. loc. cit. 95, 97. 
Acrocarpus Kütz. Linnaea 17: 103. 1843; Phyc. Gen. 405. 1843. 
Echinocaulon Kütz. loc. cit. 
