559 
Flagelliform, like the lash of a whip. 
Flexuous, flexible, easily bent; bent alternately in 
different directions. 
Floccose, occurring in small, soft tufts or masses. 
Foliaceous, flat and expanded like a leaf. 
Forcipate, forked, with the apices approaching 
each other, like a pair of forceps. 
Fragmentation, a breaking into pieces. 
Fructification, fruiting, the bearing of organs of 
propagation or reproduction. 
Fucoxanthin, a brown pigment found in some of 
the Pheophycee. 
Furcate, forked, with terminal lobes like prongs. 
Fusiform, spindle shaped, thick in the middle and 
tapering toward each end. 
Fusoid, somewhat fusiform. 
Gametangium (pl., gametangia), an organ bearing 
gametes. 
Gamete, a sexual cell. 
Ganglion (pl., ganglia), an enlargement caused by 
the fusion of separate filaments, or an enlarged 
portion of a filamentous structure from which 
smaller filaments radiate. 
Glaucous, covered with a bloom, as on the fruit of 
the plum. 
Globose, nearly spherical. 
Glomerulus (pl., glomeruli), a roundish cluster of 
organs closely grouped into a common structure. 
Gonidangium (pl., gonidangia), a specialized cell 
bearing gonidia. 
Gonidium (pl., gonidia), a cell formed nonsexually 
and slightly specialized for propagation. 
Gonimoblast, a cluster of filaments formed as a 
result of the fertilization of the egg in a carpo- 
gonium, some of whose cells become changed 
into carpospores, found in the Floridee. 
Gonimolobe, one of the lobes into which the goni- 
moblast may be divided. 
Hermaphroditic, bearing male and female organs on 
the same individual. 
Heterocyst, a more or less specialized cell which 
differs in appearance from the other cells, used 
in the Myxophycee for large cells occurring 
within the filaments and serving to break these 
apart; used in Melobesia for isolated large cells 
of unknown function. 
Heterogametes, sexual cells in which the members 
of the fusing pairs differ from each other. 
Heteromorphous, having a different shape. 
Hormogonium (pl., hormogonia), a multicellular 
portion of a filament, becoming separate and 
serving for propagation, found in the Myxo- 
phycee. 
Hyaline, colorless or translucent. 
BULLETIN OF THE BUREAU OF FISHERIES. 
Hydranth, one of the individuals in a hydroid 
colony. 
Hymenium, a network of more or less coalescent 
filaments forming a surface on which fruits are 
borne, a fruiting surface. 
Hypothallium, the ventral (lower) portion of a flat 
thallus that is differentiated into two regions. 
Incised, cut sharply into the margin. 
Indusium, a sterile outgrowth of a thallus or struc- 
ture covering fruiting organs. 
Integument, the outer covering of an organ or body. 
Tntercalary, situated at some place between the 
apex and the base. 
Intercellular, between the cells. 
Internode, the space between two nodes. 
I nterpilar, between the rows of hairs. 
Intricate, entangled. 
Tsogametes, sexual cells in which the members of 
the fusing pairs are similar. 
Lacerate, appearing torn, or irregularly cleft. 
Laciniate, cut into narrow lobes. 
Lamellose, made up of thin plates joined into a 
common structure. 
Lamina, the flattened portion of a leaflike structure. 
Lanceolate, narrow, and tapering toward each end. 
Linear, narrow, several times longer than wide. 
Lobate, divided into or bearing lobes. 
Lobe, a division of an organ or thallus. 
Medulla, the central tissue of a more or less solid 
alga. 
Medullary, situated in or belonging to the medulla. 
Mic., abbreviation for micron, the unit of micro- 
scopic measure, the one-thousandth part of a 
millimeter. 
Midrib, a thickened portion running midway along 
a flattened thallus. 
mm,, abbreviation for millimeter, about one 
twenty-fifth of an inch. 
Moniliform, like a string of beads. 
Monociliate, having a single cilium. 
Monecious, bearing male and female organs on the 
same plant. 
Monopodial, a method of branching in which there 
is a distinct main stem running to the tip and 
lateral branches of smaller size than the central 
axis. 
Monosiphonous, consisting of a single row of cells. 
Monosporangium, a sporangium whose entire con- 
tents are formed into a single spore. 
Monospore, a spore formed in a monosporangium. 
Monostromatic, consisting of a single layer of cells. 
Moriform, shaped like a mulberry. 
Mucronate, possessing a short, straight point. 
