Notes on the Blue-green Alga, etc. 425 
Ep’iphyte (Gr. efz, upon, phuton, a plant), a plant growing upon another, 
but not as a parasite. 
Fascie’ulate (Lat. fasciculus, a little bundle), clustered together in small 
bundles. 
Fil’ament (Lat. fzlamentum, filum, a thread), a fine thread, the trichome 
together with its sheath. 
Het’erocyst (Gr. hetevos, different, other, kustis, a bag), cells larger than 
the neighbouring cells which occur here and there on the filaments 
of some alge, the function of which is unknown. 
Hor’mogone (Gr. hovmos, necklace, gonos, offspring), portions of the 
trichome, consisting of one or more cells which are separate from 
the rest, and ultimately develop into new trichomes or filaments. 
The trichomes are sometimes completely broken up into these repro- 
ductive homogones. 
Indura’ted (Lat. tnduratus, induro, to make hard), hardened. 
Lam/ellose (Lat. Jamellatus, made up of thin plates), in layers. 
Mam/millose, mam’millate (Lat. from mammilla, dim. of mamma, a breast), 
with nipple-like projections. 
Membrana’ceous (Lat. membrana, membrane), thin, semi-transparent, 
papery. 
Metachro’matin (Gr. meta, with, beyond, chvoma, colour), a term applied 
to deeply-stainable granules which are found in the cells of the blue- 
green alge (and in other plants), especially in the central body. They 
are partly composed of nucleic acid and may have some relationship 
with the nucleus or nuclear chromatin, possibly being derived from it. 
Monil‘iform (Lat. monzle, a necklace, and forma, shape), trichome like a 
string of beads. (See torulose.) 
Myxophy’cee (Gr. muxo, mucus, phukos, seaweed), an earlier name than 
Cyanophycee for the blue-green alga, and now frequently adopted. 
It refers to the mucus-like or gelatinous masses and layers which 
these plants frequently form. 
Nu’cleus (Lat. a kernel;), a more or less spherical body, composed largely 
of a substance called chromatin, and having a complex structure, 
embedded in the cytoplasm of the cell. In the blue-green alge the 
central body corresponds to the nucleus. 
Phycocy’anin (Gr. phukos, seaweed, kuanos, cornflower, blue), the blue 
colouring matter contained in the cells of the blue-green alge along 
with the chlorophyll. 
Pilif’erous (Lat. pilus, a hair, feyo, I bear), bearing a hair or hairs. 
Pro’toplasm (Gr. protos, first, plasma, moulded), the viscous, semi-fluid, 
more or less granular substance contained in the cell consisting of 
the nucleus and cytoplasm. 
Refring’ent (Lat. vefringens, refringo, to break up), possessing the quality 
of refracting or bending the light rays. The cells in which this occurs 
present a bright, glistening appearance under the microscope. 
Schizophy’ceze (Gr. schizo, I split, phukos, sea-weed). Alge which in- 
crease by fission. Fission-alge, a name sometimes given to the 
blue-green alge. 
Terebri‘form (Lat. tevebra, a borer, forma, shape), like a screw. 
Tor’ulose (Lat. tovulus, from torus, a protuberance), having the cells 
swollen laterally, giving the trichomes an appearance somewhat like 
a string of beads (moniliform). 
Tri‘chome (Gr. tvichoma, a growth of hair), the row of cells in a filament, 
considered apart from the sheath. 
Trun’eate (Lat. tvuncatus, shortened), rounded off and slightly flattened 
at the apex. 
Un’einate (Lat. wncinatus, hooked), curved at the end like a hook. 
1913 Dec. 1. 
2D 
