172 GRATELOUPIACEAE 
subsessile, membranous-coriaceous, becoming subcorneous when 
dry, 0.4-0.85 mm. thick, cuneate-obovoid to suborbicular in 
general outline, 9-20 cm. long, 4-20 cm. in maximum width, often 
concavo-convex or coarsely bullate-scrobiculate, sparingly and 
irregularly lobed, the margins subentire, or bearing here and there 
numerous short ligulate or spatulate, often furcate or decompound 
proliferations, these mostly 2-12 mm. (rarely 25-35 mm.) long, 
occasionally springing from the disc also; cortex 100-170 и thick, 
compact and firm, consisting of anticlinal rows of 0-18 cells, these 
mostly 112-214 times as high as broad, the outer walls of the 
superficial cells lightly protuberant, firm, becoming with age 
conspicuously incrassate-lamellate, finally 10-16 и thick (some- 
times twice as thick as the vertical diameter of the protoplast); 
protoplasts of the superficial cells 3-5 шіп diameter when view 
from without, separated by hyaline intervals of about the same 
width; medulla compact, 160-580 и thick; sporangia few, deep- 
seated (at the base of the cortical layer), 35-55 м X 15-30%. = 
[PLATE 63 and TEXT FIGURE 44. «I 
On a small pebble, in “опе fathom,” Isla Vieja, Bahía dela || 
Independencia, July 20, 1907, Coker 09642. Тһе plants as they | | 
come to us are a dull olive-green in color, but, as already remarked 
in connection with other specimens of this collection, the mode of 
preservation, in a formalin solution, is not well adapted for retain- 
ing the natural colors, even when light is in a large measure ех- 
cluded by putting the specimens in cloth bags, as was done by Dr. 
Coker. However, the collector's notes give the color of the present 
specimen as “bright green,” so it is probable that the plants уе = 
the impression of being green, even when living. The material | 
consists of four individuals in an almost concrescent cluster. . The 
largest of the four is tetrasporic; the others are apparently sterile. 
The structure of the younger thinner ligules of Coker's 09642 is 
not very different from that of typical Grateloupia species, but the 
thick solid cortex of the older parts is essentially like that of the 
typical species of Pachymenia. Possibly the species should be 
compared with Pachymenia apoda J. Ag.* from Tasmania and 
Australia, but this is described as having at times stipitate lobes, 
while in P. cuticulosa the lobes when present are not stipitate; | 
and P. apoda, it would appear, is hardly proliferous from margins 
and disc as is P. cuticulosa. pU 
* Photographs and sketches of representatives of this species in herb. Agardh, _ 
we к to Professor Nordstedt. The species is there represented in part by sketches 
of specimens belonging to the Kew herbarium and possibly to other herbaria. | 
