550 



BULLETIN OF THE BUREAU OF FISHERIES. 



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 Phaeophyceae. 



Furcate, forked, with terminal lobes like prongs. 

 Fusiform, spindle shaped, thick in the middle and 



tapering toward each end. 

 Fusoid, somewhat fusiform. 



Gametangium (pi., gametangia), an organ bearing 



gametes. 



Gamete, a sexual cell. 

 Ganglion (pi., 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 (pi., glomeruli), a roundish cluster of 



organs closely grouped into a common structure. 

 Gonidangium (pi., gonidangia), a specialized cell 



bearing gonidia. 

 Gonidium (pi., 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 Florideae. 

 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 Myxophyceae 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. 



Heter amorphous, having a different shape. 



Hormogonium (pi., hormogonia), a multicellular 

 portion of a filament, becoming separate and 

 serving for propagation, found in the Myxo- 

 phyceae. 



Hyaline, colorless or translucent. 



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. 



Intercalary, situated at some place between the 

 apex and the base. 



Intercellular, between the cells. 



Internode, the space between two nodes. 



Interpilar, between the rows of hairs. 



Intricate, entangled. 



Isogametes, 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. 



Monoecious, 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. 



