78 



A GLOSSARY OF TERMS 



HI'LTJM. Lat. Umbilicus. The scar 

 or mark on the seed, indicating 

 the point by which it is attached 

 to the placenta. The base of the 

 seed. 



HIND. A female deer. 



HINGE MARGIN. The hinge of bi- 

 valves, composed of the ligament, 

 the cartilage, and the teeth. 



HIPPO'CAMPUS. fr. gr. ippos, a horse , 

 kampe, crookedness. Systematic 

 name of the sea-horse. 



HIPPO'GLOSSUS. fr.gr. ippos, a horse ; 

 glossa, tongue. Systematic name 

 of the holibut. 



HIPPO'NYX. fr.gr. ippos, a horse; 

 onux, nail. Name of a genus of 

 gasteropods. (p. 58, Book v). 



HIPPOPO'TAMI. Lat. plur. of hippo- 

 potamus. 



HIPPOPO'TAMUS. fr. gr. 'ippos, horse ; 

 potamos, a river. The river- 

 horse. 



HiPPOTHE'RiUM.-fr.gr. ippos. a horse ; 

 therion, a beast. A fossil quadru- 

 ped allied to the horse. 



HI'PPURITES. fr. gr. ippouris, horse- 

 tail : a certain fish. A genus of 

 extinct rnollusks, supposed to be 

 bivalve. The principal valve is 

 of a sub-cylindrical, or elongated 

 conical form, traversed by one or 

 more internal longitudinal ridges, 

 and closed by a small sub-circu- 

 lar valve like an operculum. (p. 

 68, Book viii). 



HIRCUS. Lat. A male goat. 



HIRSU'TA. 7 T XT- 



> Lat. Hirsute. 

 HIRSU TUS. 3 



HIRSUTE. Covered with soft hairs. 



HISPID. Rough with stiff hairs. 



HISTO'LOGY. fr.gr. istos, a tissue ; 

 logos, a discourse. The doctrine 

 of the tissues which enter into 

 the formation of an animal, and 

 its various organs. 



HOAR-FROST. Frozen dew. 



HOARY. Covered with white down. 



HOLERA'CEOUS. fr. lat. Ao/ws, pot- 

 herbs. Suitable for culinary pur- 

 poses. 



HOLO'PTICUS, and HOLOPTY'CHIUS. 



fr. gr. olos, the whole ; ptuchios, 

 folded. A fossil fish of the ganoid 

 order, the enamelled surface of 

 whose scales was marked by large 

 undulating furrows. It had sharp 

 conical teeth, (p. 44, Book viii). 



HOMIO'MERAL. fr. gr. omios, similar ; 

 meros, a part. Applied to two 

 substances of which all the parts 

 are exactly alike. 



HO'MO. fr. gr. omos, one and the 

 same. A prefix denoting resem- 

 blance. 



HO'MOCERCAL. fr.'gr. omos, joined; 

 kerkos, a tail. Applied to the tail 

 appended to the termination of 

 the spine, as in most of the fishes 

 now existing, (p. 49, Book viii). 



HOMODRO'MAI. fr. gr. dromos, a 

 course. Applied to the peduncles 

 of the cyme of monocotyledons, 

 when the direction of the spire is 

 the same as that of the central 

 stem : the antidromal direction is 

 the reverse of that of the central 

 stem. 



HOMO'GAMOUS. fr. gr. gamos, mar- 

 riage. Applied to those capitula 

 in which all the flowers are her- 

 maphrodite. 



HOMOGA'NGLIA'TA. fr. gr. gagglion, 

 a nerve-knot. Mr. Owen's name 

 for the articulata of Cuvier; the 

 annulosa of Macleay ; and the di- 

 ploneura of Grant. 



HOMOGE'NEOUS. fr.gr. genos,a kind. 

 Applied to substances consisting 

 of similar parts and properties. 



HOMOLO'GUE. fr. gr. logos, a de- 

 scription. The same organ in 

 different animals under every va- 

 riety of form and function. 



HOMO'MALLOUS. fr. gr. ma/los, hairs. 

 Applied to spikes in which all 

 the flowers incline to one and the 

 same side. 



HOMOMO'RPHOTTS. fr. gr. morphe, 

 form. Of the same, or similar 

 form. Applied to certain neurop- 

 terous insects, which, in their lar- 

 va state, are similar in form to the 

 perfect insect, though wingless. 



