(136 ) 
PLATE 88 
Pe qaca as (?) munitum, Photograph of a vertical section (decalci- 
ed), magnified 17 diameters, showing overgrown conceptacles, etc. (free 
ae to the right). 
PLaTE 89 
Lithophyllum (?) munittum. Photograph near the surface in a vertical 
section (decalcified), magnified 165 diameters, showing the numerous over- 
grown hypothallia, etc. 
PLATE 90 
1. Lithophyllum Chamaedoris. Photograph of a section (decalcified) 
through the Lzthophyllum and the wall of the Tales stalk, magnified 
— diameters, showing conceptacle, form of cells, e 
. Lithothamnion mesomorphum ornatum. es aph of a section 
(decalcified) through a proliferation and part of the main thallus, magnified 
165 diameters. ‘The ventral side shows the larger intercellular spaces. 
PLATE 91 
ence accretum, Photograph of a vertical section (decalcified) of 
nO. 29208 pe), magnified 165 diameters. The thallus in xo. 2920a is 
unusually ne and well-developed. The horizontal line near the middle 
represents a hypothallus, as is shown more clearly farther along on the same 
section, where the two layers become discrete. In no specimen other than 
no, 29204 have we observed superposed layers. 
PLATE 92 
Lithophyllum bermudense. Photograph of ae oo section (decalcified) 
of 0. 199 (type), magnified 165 diameters. The on the cells mostly 
with especial clearness in the case of the elongated cells just above the over- 
grown conceptacle 
P 
Lithophyllum daedaleum. Photograph of vertical section (decalcified) of 
x of a branch, magnified 165 diameters. Section made from the speci- 
men shown at top of Plate 84 ae 2193). (This photograph was obtained at 
a time saa it was thought to make this specimen of o. 2193 the type of 
the species; however, the structure, as exhibited here, does not seem to 
differ ae from that of the type-number — 2676). 
