GLOSSARY 381 



Gland {gland). An organ whose function is the secretion of something to be used in, 



or ejected from, the body. 

 Glaucomys {glaw ko' mis). A genus of flying-squirrels. 

 Glenoid fossa (gle' noidfos' sa). The cavity into which tlie head of the humerus fits. 



Glochidium {glo kid' i um). The young stage of a mussel, which becomes temporarily 

 attached to fishes. 



Glomerulus {glo mer' u his). A coil of blood capillaries at the end of each tubule in 

 the kidney of a vertebrate animal. 



Glossozoa {glos' so zo' a) A group of animals (literally, tongue animals) in Oken's 

 early classification. It comprised the fishes. 



Glottis {glof tis). A slit-like opening in the larynx at the anterior end of the trachea 



in vertebrates. 

 Glucose {glu' kose). Grape sugar. 

 Glycerol {glis' er ole). An alcohol entering into the composition of fats and having 



the empirical formula CsHs (OH) 3. Same as glycerin. 

 Glycerophosphoric {glis' er ofosfor' ic). A dibasic acid found in combination in the 



lecithins. 

 Glycogen {gW kojen). Animal starch; a common form of stored carbohydrate food 



in animal tissues. 



Gmelin, Johann {gma' lin). German botanist, 1709-1755. 



Goblet cell {goh' let). A secreting cell containing a substance ready for secretion, and 



often having the shape of a goblet owing to the enclosed substance. 

 Gomphoceran {gom fos' er an) . Any extinct cephalopod resembling Gomphoceras, 



whose shell was short and wide. 

 Gomphus {gom' f us). A genus of dragon- flies. 

 Gonad {go' nad). An organ in which germ cells (either oogonia or spermatogonia) 



are produced or lodged. 



Gonangium {go nan' ji um) . An individual without tentacles in a typical hydroid, 

 whose function is the production of medusae. 



Goniatite {go' ni a tite) . An extinct cephalopod having a coiled shell, and bent or 

 angular sutures; so named from the genus Goniatites {go' ni a ti' teez). 



Gonionemus {go' ni o ne' mus). A genus of jelly fishes. 



Gonium {go' ni um). A genus of colonial flagellate organisms in which the cells 

 are held in a flattened gelatinous mass. G. sociale {so' shi a' le) of four cells; 

 G. pectorale {pek' to ra' le) of 16 cells. 



Gonoduct {go' no dukt). A tube by which germ cells (either eggs or sperms) are 

 discharged from a gonad. 



Gonophore {go' no fore). One of the reproductive members of a siphonophore colony. 



Gonotheca {go' no the' ka). The tough sheath surrounding a gonangium. 



Gopherus {go' Jer us). A genus of turtles. 



Grain {grane). Small elevations on the leaves of tobacco, due to certain kinds of 

 deposits within them. 



Grantia {gran' ti a). A genus of calcareous marine sponges. 



Graze {graze) . To eat grass or similar herbage. 



Gregaloid {greg' a loid). Loosely aggregated into an irregular mass. 



Gregarine {greg' arin). One of a family of parasitic Protozoa; for example, Mono- 

 cystis, parasitic in the seminal vesicles of the earthworm. 



