CALLOPHYLLIS 117 
Sessile, subpeltate, or irregularly cordate at base, with an 
attachment callus about 1 mm. broad, irregularly lacerate to 
about the middle into a few (3-5) main divisions, these somewhat 
crenately margined or again irregularly lobed, the sinuses bullate- 
undulate; thallus gelatinous-membranous, 150—240 и thick; me- 
dulla very gelatinous and hyaline, appearing under ordinary 
treatment to consist of small elongate, trigonous, or substellate 
cells sparingly scattered through a transparent homogeneous jelly, 
but after staining (i. e. with haematoxylin) seen to consist of large 
cells, mostly 55-257 и X 40-106 u, in 1-3 irregular series, sub- 
vacuous or with tenuous almost imipierceptible мии апа 
large vacuoles and with very thick more or less confluent gelatinous 
walls, small cells and slender filaments appearing =s and there 
in the interstices; subcortex of two or three series of outwardly 
gradually smaller cells; cortex proper about two cells thick, the 
protoplasts о the superficial cells 4-8 шіп longest (usually vertical) 
iameter, 1-2 times as long as broad, usually two from eac 
subjacent cell, mostly separated by hyaline intervals 3-8 и broad; 
sporangia scattered in subcortex, 24—33 и X 13-17 и (excluding 
gelatinous walls). [PLATE 32, FIGURE В. 
PLATE 32, FIGURE B. Callophyllis chilensis 
Photograph of an = young tetrasporic specimen (Coker зо p.p.—írom 
liquid preservative), natural s 
Okamura’s Alg. ae Exsicc. по. 12, issued as “Callophyllis 
(Microcoelia) chilensis (J. Ag.),” is, we believe, a specifically 
different plant, being in structure close to typical Callophyllis, 
though it appears to have enough in common with Microcoelia 
chilensis to make it difficult to maintain Microcoelia* as a genus. 
The thallus of the Japanese plant is less crenate-margined and is 
much firmer, and less gelatinous than that of the Chilean and the 
Peruvian plants; the large cells of the medulla are comparatively 
firm-walled and are readily visible when sections are made, 
mounted in water, and examined under the microscope in the 
ordinary way; the small-celled intercalating filaments are more 
numerous and more conspicuous; the cortex is thicker and much 
firmer and the surface cells average considerably smaller. 
* In connection with the possible recognition of this genus, it may be remarked 
that the name Microcoelia J. Ag. (1876) is a homonym of Microcoelia Lindl, ийн 
and із accordingly invalid under the provisions of ie “American Code” of nomen- 
clature. There seems to be a possibility also that an application of the “Vienna 
Rules” may result in the recognition of Microcoelia Lindl. as the legal name of the 
genus of orchids currently known as Mystacidium Lindl. (1836). 
