F IT S 



[184] 



which fly with great force and 

 rapidity. In the ostrich and casso- 

 wary, it is imperfect, the lateral 

 branches not uniting together. 



The ornithorhynchus and ich- 

 thyosaurus both possess a peculiar 

 form of sternum, resembling the 

 furcula of birds. The echidna is 

 the only known land quadruped 

 that has a similar furcula and cla- 

 vicles. A cartilaginous rudiment 

 of a furcula occurs also in the 

 dasypus. 



FU'SCITE. An opaque mineral of a 

 greyish or greenish-black colour, 

 found in Norway, in masses of 

 granular quartz. 



IV SIFOBM. Spindle-shaped, swelling 

 in the centre with the ends taper- 

 ing ; intermediate between the 

 conical and the oval. 



GAL 



A subfusiform. univalve, 

 ventricose in its middle or lower 

 part, with a canaliculated base, 

 and no varicose sutures j an elon- 

 gated spire, a smooth columella, 

 and the lip not slit. The genus 

 comprises many species. The genus 

 fusus comprises all shells with a 

 salient and straight canal, which 

 are destitute of varices. Pusi are 

 found at depths varying to eleven 

 fathoms, in mud, sandy mud, and 

 sand. 



IVsus CONTBA'BIUS. A species of 

 fusus found in the crag of Suffolk, 

 a sinister shell. The fusus con- 

 trarius, or reversed whelk, which 

 is synonymous with the murex 

 contrarius of Linna3us, appears to 

 be a shell characteristic of the crag 

 deposit. 



GA'BBBO. A crystalline granular mix- 

 ture of labradorite, diallage, and 

 euphotida. 



GA'DOLINITE. A mineral thus named 

 after Gadolin, who first ascertained 

 its composition. Its colour is green- 

 ish-black ; that of its po wder green- 

 ish-grey. Occcurs massive; in 

 granular and prismatic concretions. 

 Eracture conchoidal and glassy. 

 According to Berzelius its con- 

 stituent parts are yttria 45*93, 

 silica 24 '16, protoxide of cerium 

 16-90, protoxide of iron 11-34. 

 It was first discovered at Ytterby, 

 in Sweden, by Capt. Arhenius, in 

 white felspar ; it is found also in 

 Ceylon, in granite. 



GA'HNITE. Thus named from Gahn ; 

 another name for automalite. 



GAILLONE'LLA FEBBTJGI'NEA. The 

 name assigned to a minute ani- 

 malcule, the case of which is found 

 in bog-ore. 



GA'LACTITE. (70X^7/7775, Gr.) Milk- 

 stone. 



GA'LEA. (Lat.) A genus of echini, 

 found fossil only. They are dis- 

 tinguished by an oval base, from 

 which the shell rises in a vaulted, 

 helmet-like form. 



GAL'EOLA. A genus of echinites pos- 

 sessing the same characters as the 

 galea, but differing in size. This 

 circumstance induced Klein to di- 

 vide them into two genera, but 

 Leske deeming a mere difference 

 of size as insufficient to affect the 

 genus, included them both under 

 the genus echmocorys. Parkinson. 



GA'LEATED. (galeatm, Lat.) Helmet- 

 shaped ; covered as with a helmet. 

 In botany, plants bearing fiowers 

 of a helmet shape, as the monk's- 

 hood. 



GALE'NA. (galena, Lat.) A shining 

 metallic ore, composed of sulphur 

 and lead ; sulphuret of lead j lead- 



