LOBOCOLAX . 91 
simple, I-celled, terminating filaments of cortex; carpogonia 
fusiform, filiform, or lageniform, the trichogynes filiform or often 
short and irregular. Auxiliary cells wanting. Cystocarps few 
(2-10)-spored, the spores enclosed within the slightly modified 
carpogonium wall or the cystocarps occasionally showing one or 
more very short one- or two-celle ranches; an apical cell, 
occupying position of the former trichogyne, apparently remaining 
sterile. Dioecious (or sometimes monoecious ?). Antheridia con- 
sisting of single cells terminating short branchlets of the cortical 
filaments. Sporangia unknown. 
Lobocolax deformans sp. nov. 
Characters of the genus. Сивһіопв wart-like, 1-8 mm. broad, 
1-4 mm. high, sessile, attached by a base usually 12-14 as broad; 
cortex 100-350 u thick; cells (protoplasts) of cortical filaments 
mostly 3-19 u X 2-5 ш; cuticle becoming 8-654 thick before 
exfoliation. [PLATE 32, FIGURE A and TEXT FIGURES 20-39; see 
also PLATES 64 and 65.] 
On and in Prionitis decipiens (Mont.) J. Ag., Lobos de Afuera, 
Маг. 27, 1907, Coker 144 p.p. (type,—PLATE 65); Chincha Islands, 
June 18, 1907, Coker тот p.p.; also, same locality and date, Coker 
193 Р.Р. and тод p.p.; Chincha Islands, July 13, 1908, Coker 402 
p.p. (PLATE 32, FIGURE A; PLATE 64). 
The simple or reduced cystocarps and the mode of occurrence 
of the antheridia suggest placing Lobocolax with the Nemalionaceae 
(Helminthocladiaceae), though the vegetative structure, including 
the frequent anastomoses of the cells, both of medulla and cortex, 
is somewhat suggestive of the Gigartinaceae. The anticlinal 
corticating filaments also resemble in a way those of its host, but 
the cell walls in the parasite are less rigid, the cells themselves are 
more vacuous, and they anastomose more freely. Superficially 
Lobocolax bears more or less resemblance to Actinococcus, but it 
differs much іп vegetative structure and there is, we believe, no 
possibility that it represents a sexual condition of Actinococcus. 
As compared with Actinococcus, the medulla of Lobocolax occupies 
a relatively very much larger proportion of the external thallus 
and it consists of more obvious, more vacuous, and more loosely 
interwoven filaments; the cortical filaments anastomose and ¢o- 
here and do not separate and curl up when a section is placed in 
water as happens with Actinococcus, and, with the exception of 
