ONYGENACEJE 



OPHITE 



Onygenacege, (on-i-jen-a'se-e). [Gk. onyx, 

 nail; gennao, offspi-ing.] Fungi, developed 

 on feathers, hair, hoofs, horns, &c. , belonging 

 to Ascomycetes. 



Onygenei, ( on-i-jen'e-I ). [Gk. onyx, nail; 

 gennao, I produce.] Hoof -fungus, &c. : 

 fungi, all small, developed on animal sub- 

 stances; have a club-shaped receptacle. 



Onyx, ( on'iks ). [ Gk. onyx, nail. ] A 

 variegated variety of agate; a variety of 

 chalcedony in variously coloured even, 

 layers. 



Oogonia, (o-o-go'ni-a). [Gk. oon, egg; gonia, 

 corner.] In fungi: cells in which oospheres 

 are formed. 



Oogonium, (o-o-go 'ni-um). Singular of 

 oogonia, q.v. 



Oolean. An Oceanic race. 



Oolite, (6'o-lit). [Gk. oon, egg; litJws, stone.] 

 A variety of carbonate of lime. Great 0. = 

 Bath-stone; also called Forest-marble. 0. 

 limestone: composed of small accretions of 

 limestone surrounding grains of sand; some- 

 times found in rocks older, and in others 

 newer, than the oolitic. 



Oolitic system, (6-o-lit'ik). [Oolite, q.v.]= 

 Jurassic system: a secondary formation be- 

 tween the Lias and the Cretaceous. 



Oosphere, (6'os-fer). [Gk. oon, egg; sphaira, 

 ball.] Germinal bodies in fungi. 



Oospore, (o'os-spor). [Gk. oon, egg; spora, 

 seed.] An oosphere, q.v., with a wail formed 

 round it, capable of germination at once 

 or at a future time. 



Oostegite, (6-os'te-jlt). [Gk. oon, egg; stego, 

 I cover.] Scales, &c., protecting the eggs 

 in Annulosa. 



Ootheca, (o-o-the'ka). [Gk. oon, egg, theka, 

 case.] = Egg-purse = Egg-case of cockroach: 

 contains eggs, like peas in a pod. 



Opah fish^Lampris, q.v.; also called King- 

 fish. 



Opal, (o'pal). [Opalus, the Latin name.] A 

 translucent, iridescent, amorphous mineral, 

 chiefly hydrated silica. Girasol, hydrophane, 

 hyalite, menilite, and fiorite are varieties of 

 opal. Fire 0.=Girasol. 



Opelet=Anthea cereus: a fleshy zoophyte; 

 the chief constituent in the edible dish, 

 Rastegna. 



Opera glass. A binocular variety of the 

 telescope, used for short distances. 



Opercular, (6-per'ku-lar). [Operculum, q.v.] 

 Connected with the operculum, q.v. 0. 

 bones: form the gill-cover of fishes. 



Operculum, (6-per'ku-lum). [L. operculum, 

 lid.] 3. Gill-cover: closes the entrance of 

 the branchial chamber of fishes; possibly 

 the homologue of the human ear-flap. 2. 

 Used generally for any cover to an opening, 

 as of the shell of Gasteropoda, &c. 



Ophiacantha, ( of-i-a-kan'tha). [Gk. ophis, 

 serpent; akantha, spine.] 0. spinulosa: a 

 star-fish abundant in deep water of North 

 Atlantic. 



Ophiderpeten, (of-i-der'pe-ten). [Gk. ophis, 

 serpent; herpeton, reptile.] An amphibious 

 animal belonging to Labyrinthodonta; allied 

 to Ophiomorpha. 



Ophidia, (of-id'i-a). [Gk. ophis, serpent. ]= 

 Snakes: reptiles in which the limbs are 

 rudimentary, or entirely absent ; have 

 long, worm-like, scaly bodies, and no ster- 

 num; and progress by means of rib-bones, 

 which are very numerous. Families of 

 0.: 



Viperine 

 Crotalidse. 

 Viperidse. 

 Colubrine 

 Hydridse. j 

 Boidse. 

 Colubridsa 

 Water-snakes=Hydrophidfe=Hydridse. 



Ophidium, (of-id'i-um). [Gk ophis, snake.] 

 an eel-like fish belonging to Malacopterygii. 



Ophldobatrachia, (of-i-d5-bat-ra'ki-a). [Gk. 

 ophis, serpent ; Batrachia, q .v.] = Ophio- 

 morpha, q.v. 



Ophiocoma, (of-i-ok'o-ma). [Gk. ophis, ser- 

 pent; kome, hair.]=Brittle-star: a star-fish 

 belonging to Ophiuroidea; it cannot swim, 

 and moves only on solid surfaces. 



Ophioglossaceae, (of-i-o-glos-sa'se-e). [Ophio- 

 glossum, q.v.] Adder's - tongues : plants, 

 with hollow stems, and without chlorophyll, 

 belonging to Filicales; intermediate between 

 Lycopodiacese and Filices. 



Ophioglossum, (of-i-6-glos'sum). [Gk. ophis, 

 snake ; glossa, tongue. ] Adder's-tongue: 

 a fern -like plant the type of Ophioglos- 

 saceae. 



Ophiolepis, (of-i-ol'e-pis). [Gk. ophis, serpent; 

 lepis, scale.] An echinoderm. 



Ophiolite, (of'i-o-ht). [Gk. ophis, serpent; 

 lithos, stone.]=Serpentine, q.v.: a mineral, 

 chiefly silicate of magnesia, named from the 

 serpent-like waves of cloudiness; also called 

 Verd-antique. 



Ophiology; (of-i-ol'o-ji). [Gk. ophis, serpent; 

 logos, discourse. ] The sub-division of zoology 

 which treats of serpents. 



Ophiomorpha, (of-i-o-mor'fa). [Gk. ophis, 

 serpent; morphe, shape. ]=Gymnophiona: a 

 burrowing, snake-like animal, belonging to 

 Amphibia, having a body marked with 

 transverse grooves, no limbs, and a small 

 head. Found in hot climates, probably the 

 last remnant of a race to which Labyrintho- 

 donts belong. 



Ophiophagus, (of-i-of'a-gus). [Gk. ophis, 

 serpent; phago, I eat.] A poisonous, colu- 

 brine snake, named from being supposed 

 to feed on other snakes. 



Ophiopholis, (of-i-ofo-lis). [Gk. ophis, ser- 

 pent.] 0. aculeata: a star-fish abundant in 

 deep water of Atlantic. 



Ophioxylon, (of-i-oks'i-lon). |Gk. ophis, ser- 

 pent; xylon, wood.] Snake-wood: Strychnoa 

 colubrina, named from being used medici- 

 nally in cases >f snake-bite. 



Ophisaurus, (of-i-saw'rus). [Gk. ophis, ser- 

 pent; sauros, lizard.] Glass-serpent=Anguis 

 ventralis: a snake, with a reptile-like head, 

 so fragile as to be easily broken into several 

 pieces. 



Ophite, (of It). [Gk. ophis, serpent.]=Ophio- 

 lite=Serpentine, q.v. 



