428 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
Fig. 39 . Lithophylhm okamurai: Habit, X 0.9. h, Neogoniolithon myriocarpum: Habit, X 1. 
This specimen has the characteristic struc- 
ture of a thin, smooth Lithophyllum species 
and agrees well with the description of L. 
samoense. The crusts are mostly 150-200 ^ 
thick and the small, convex tetrasporangial 
conceptacles only about 100-130 /x in di- 
ameter. 
Neogoniolithon myriocarpum (Foslie) 
Setchell and Mason 1943: 90. Lithoth amnion 
myriocarpum Foslie 1897: 19 (Red Sea). 
Goniolithon myriocarpum Foslie, in Weber 
van Bosse and Foslie 1904: 45, pL 9, figs. 
^ Kg. 39^ 
LOCAL DISTRIBUTION: Growing on a shell 
dredged in about 5 m., Sta. 2 (11125). 
This specimen agrees well in habit and 
structure with the descriptions and figures of 
this species. It forms thin crusts about 200- 
2,500 }x thick, becoming superimposed, and 
with concentric striations and large, hemi- 
spheric-conical tetrasporangial conceptacles 
500-600 iJL in diameter. The thallus is com- 
posed of a hypothallium of horizontal, as- 
cending rows of elongated cells giving rise to 
erect, perithallium cell rows supporting an 
epithallium of small, flattish cells. As Foslie 
indicates (1904) heterocysts are scarce or un- 
recognizable. 
Lithoporella pacifica (Heydr.) Foslie 1909: 
59- Melobesia pacifica Heydrich I90I: 529 
(Hawaii) 
Fig. 40^ 
LOCAL DISTRIBUTION: Loosely attached to 
undersurfaces of coral dredged from 2-7 m., 
Sta. 2 (11281, 11376). 
This species is exceedingly fragile, being 
monostromatic, 45-60 /x thick, and brittle 
from heavy calcification. Its repent habit and 
large conceptacles 1 mm. or more in diameter 
are distinctive. 
