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Geology of Sydney. 
Sauria (Gr. saura , a lizard). Any lizard-like reptile is 
often spoken of as a “ Saurian,” but the term is some- 
times restricted to the Crocodiles alone, or to the 
Crocodiles and Lacertilians. 
Schist. (Gr. schizo , I cleave). A crystalline foliated rock. 
When the name of a mineral is prefixed, this indicates 
that the mineral is abundant in the schist. 
Schizoneura. A fossil plant, see Text — page 172. 
Septa. Partitions. 
Sigillariods (Lat. sigillu fi, a little seal). A group of ex- 
tinct plants, of which Sigillaria is the type, so called 
from the seal-like markings on the bark. 
Sphenopteris (Gr. sphen , a wedge ; pteris , a fern). An 
extinct genus of fern. 
Spirifera (Lat. spira, a spire or coil ; fero, I carry). An 
extinct genus of Brachiopods, with large spiral sup- 
ports for the “ arms.” 
Spongida (Gr. spongos , a sponge). The division of Proto- 
zoa commonly known as sponges. 
Stalactites (Gr. stalasso , I drop). Icicle-like masses and 
deposits of calcium carbonate hanging from the roofs 
of caverns in limestone. 
Stalagmite (Gr. stalagma, a drop). A mass of calcium 
carbonate rising from cavern floor. 
Stigmaria (Gr. stigma , a mark made with a pointed 
instrument). A genus founded on the roots of various 
species of Sigillaria. 
Syringopora (Gr. surinx , gen. suringos , a pipe ; poros , a 
pore). A genus of Tabulate Corals. 
