AHNFELTIA 113 
Coker 5 p.p. (PLATE 45, FIGURE B); also, same locality, Feb. 5, 
1907, Coker 54, “green, common оп the rocks beaten by the өші”; 
“very abundant on surf-washed rocks," Guafiape Islands, Маг. 7, 
1907, Coker 121 p.p. 
This variety evidently grows with the typical form and seems 
to be connected with it by intermediate conditions. 
The original of Kützing's Tylocarpus implicatus, which came 
from Peru, we have been able to examine through the courtesy of 
Mme. A. Weber-van Bosse. 
PLATE 45, FIGURE B. Ahnfeltia Durvillaei implicata 
Photograph of Coker's no. 5 p.p. (from liquid preservative), natural size. 
Both the typical Ahnfeltia Durvillaei (121 p.p., 139 p.p.) and the 
variety implicata sometimes bear what appears to be a parasite of 
somewhat the general habit of an Actinococcus, but differing in struc- 
ture and evidently not referable to that genus or to Sterrocolax 
or Lobocolax. It forms discoid, subglobose, or irregular cushions 
I-3 mm. broad and about 1 mm. thick. А section shows a com- 
pact mass of fine very irregularly intertangled branching and 
anastomosing filaments, bounded externally by a cortex that con- 
sists of short anticlinal filaments 2-4 (rarely 6) cells long or may 
even be reduced to the single layer of superficial cells. Осса- 
sionally some of the outer cells have the appearance of becoming 
slightly enlarged and finally detached (sometimes after a transverse 
division), but we do not feel confident that we have observed the 
actual reproductive cells. In a section, the cells of an endophyte 
(Erythrocladia sp.?) vegetating in outer gelatinous walls of the 
cortex may at first sight simulate monosporangia. Тһе specimens 
of A. Durvillaei from Mollendo (565 p.p.) bear less flattened 
cushions, sometimes 2 mm. thick or high, and these show a well- 
differentiated yellowish coarser central part to the medulla and a 
thick strongly developed cortex composed of obviously and fre- 
quently anastomosing anticlinal filaments that are commonly 
10-20 cells long. We suspect, however, that the Mollendo plant, 
in spite of these differences, represents a condition of the same 
species of parasite as the other cushions on hen same host, pre- 
viously mentioned. 
Under the name Sphaerococcus (Gigartina) plicatus, a single 
“ fructiferous"" specimen from Callao has been noted by Montagne 
