488 



GLOSSARY. 



PYRAMIDELLA, a pyramid; a genus 

 of shells. 



PYRGOMA, a tower ; a genus of 

 cirrhipoda. 



PYRIFORM, pear-shaped. 



PYRITES, sulphuret of iron, a com- 

 pound of sulphur and iron. 



PYROGENOUS, igneous, applied to 

 ancient melted rock;?. 



PYRULA, a little pear; a genus of 

 shells. 



Q. 



the 



QUADRUMANA, four -handed, 



monkey-tribes. 

 QUA-QUA-VERSAL DIP, the dip of beds. 



from a common centre to all 



points of the horizon. 

 QUARTZ, a simple mineral, composed 



of silex, in its purest form. 

 QUARTZOSE, rocks composed of silex, 



or flint. 



B. 



KADI AT A, the lowest primary division 

 of the animal kingdom ; as the 

 echinoderms, polyparia, &c. 



EADIOLITES, lat., radius, a ray; a 

 genera of shells. 



RAMOSE, branched. 



RANELLA, a little frog ; a genus of 

 shells. 



RENIFORM, kidney-shaped. 



RENULITES, lot., ren, a kidney. 



RETICULATE, resembling net-work. 



RHOMB, a quadrilateral figure, of 

 diamond-like shape, having its 

 four sides equal. 



RHOMBOID, a similar figure, having 

 only two sides equal. 



RICINULA, like the castor-oil seed. 



RODENTIA, gnawers : an order of 

 animals having a peculiar denti- 

 tion, as the rabbit, hare, squirrel, 

 rat, &c. .2 



ROSTELLARIA, a little beak ; a genus 

 of shells. 



ROTALITES, lat., rota, a wheel ; a ge- 

 nus of foramenifera. 



ROTELLA, a very small wheel ; do. 



RUBBLE, fragmentary beds of stone. 



RUMINANTIA, lat., rumino, animals 

 which chew the cud or ruminate 

 as the ox, deer, &c. 



S. 



SABELLARIA, lat. sabellum, coarse 

 sand. 



SANGUINOLARIA, lat, sanguis, blood ; 

 a genus of shells. 



SAURIAN, an animal, belonging to 

 the lizard tribe. 



SAXICAVA, lat. saxum, a rock, and 

 cavo, to hollow; a genus of shells. 



SCALARIA, a flight of stairs; a genus 

 of shells. 



SCAPHITE, extinct genus of cepha- 

 lopoda, of a boat-like form. 



SCHIST, the same as slate, from the 

 Greek o'X'C"', to split, in allusion 

 to the facility with which rocks 

 of this texture may be divided or 

 split. 



SCORIA, volcanic cinders. 



SECULAR, used to describe the vast 

 periods of geological changes. 

 Thus secular refrigeration indi- 

 cates the succession of ages, during 

 which our planet has cooled doM'n 

 from its presumed original state 

 of fluidity, to its present solid 

 condition. 



SEDIMENTARY, deposited as a sedi- 

 ment by water. 



SEGREGATION, a chemical separation 

 of mineral substances. 



SEPIA, lat., sepio, to cover or conceal ; 

 a genus of cephalopoda. 



SEPTA, partition, as in the shells of 

 the nautili. 



