DOKIDJS 



107 



DROffE 



Dormouse. 



Doridse, (do'ri-de). [Doris, g.i?.]=Sea-lemons: 

 animals belonging to Gasteropoda. 



Dorippe. A very small crab. 



Doris, (do'fls), [Classical.] =Sea-lemon. 



Dormouse, (dor'mous). [L. dormio, I sleep.] 

 = Mus glis = Myoxus 

 avellanarius : a small 

 hybernating animal re- 

 sembling tha squirrel, 

 living in trees. 



Doronicum, (do - ron'i - 

 kum). [ Doronigi, the 

 Arabic name. ] = Leo- 

 pard's bane: an herb, 

 with yellow flowers, belonging to Asteraceae. 



Dorsal, (dor'sal). [L. dorsum, back.] Be- 

 longing to or relating to the back. D. 

 region : the Vertebrae, &c. D. fin : a variety 

 of median fin, q.v., formed by an expansion 

 of the integument of the back. D. side of a 

 bivalve: that on which the valves are hinged. 



Dorsibranchiata, (dor-si-brang-ki-a'ta). [Dor- 

 sal and Branchiata, q.v.] = Errantes: a 

 division of Annelida, in which the branchiae 

 are attached to the back, including sea- 

 centipedes and sea-mice. 



Dorsigera, (dor-sij'e-ra). [L. dorsum, back ; 

 gero, I carry.] Opossums with unde- 

 veloped pouches, who carry their young on 

 their back. 



Dory, (do'ri)=Doree, g.v.=Zeu3 faber: a sea 

 fish. 



Dorypterus, (dor-ip'ter-us). [Gk. dory, lance ; 

 pteryx, fin.] A ganoid fish, known by fossil 

 remains in Permian rocks. 



Double, (dub'l). [The French word.] D. 

 oro!in,ae=Appl5cate ordinate, q.v. D. re- 

 fraction: the refraction of a single ray of 

 light into two, when passing through such 

 crystals as Iceland spar, emerald, &c. J). 

 salts: in which two bases are united with 

 the same radicle. D. stars: Castor, Cor- 

 Caroli, Polaris, Eigel ; about 6000 known. 



Doubly-symmetrical type of animals, Von 

 Bajr's term for Vertebrata. 



Doum=Doom-palm, q.v. 



Dourada = Coryphsena equisetis : a fish of 

 Madeira. 



Dove, (duv). [Duva, the A.-S. name.]= 

 Columbus : the type of Columbacei, q.v. 



Dove's syren. [Professor Dove.] An appa- 

 ratus by which the rate of vibration of any 

 sounding body can be ascertained. 



Dowks, (dowks)= Fissures, or the contents of 

 fissures, in rocks. 



Down, (down). The soft feathers of birds, 

 usually on the summits of first true feathers. 



Downton sandstone. [Downton, near Lud- 

 low.]=Tilestones, q.v. 



Draba, (dra'ba). [Gk. drabe, acrid.]=Whit- 

 low grass: a small herb, belonging to Bras- 

 sicacese, named from the taste. 



Draco, (drak'6). [The Latin name.] 1.= 

 Dragon : a lizard belonging to the family 

 Agamidte. 2.=The Dragon: a northern 

 constellation, containing many second class 

 stars, one of which, y Draconi, is the one 

 used by Bradley in tho discovery of aber- 

 ration of light. 



Draconyl, (drak'o-nil). [Dragon's blood, q.v.} 

 =Metastyrol, q.v. : a solid substance obtained 

 from dragon's blood. 



Dracunculus,(drak-un'ku-lu8). [Dim. of Draco, 

 q.v.] A small lizard resembling Draco, q.v. 



Dragon, (drag'ori). [ Drakon, the Greek 

 name.] D. blood: resin from Dractena 

 draco, Calamus draco, and other trees. D. 

 fish = Dragonet = Callionymus : a sea-fish 

 belonging to Gobiadse. D. ^ies=LibeUula3 : 

 large beautifully coloured insects belonging 

 to Orthoptera. D. f?'ee=Dracsena : a plant 

 belonging to Liliaceae. 



Dragonet, (drag'o-net). A fish, belonging to 

 Gobiidae. Gemmeous J).=Male of Calliony- 

 mus lyra : brilliant colours. 



Dredge, (drej). [ Drcege, the A.-S. word.] 

 For deep-sea sounding. An apparatus for 

 obtaining specimens of sand, shells, &c., 

 from the bottom of the sea. Ball's D., q.v. 

 Naturalist's D., larger, with large hempen 

 tangles. 



Dredging. Removal of matter deposited at 

 the bottom of rivers or the sea. 



Dressing. The term used to describe the 

 various processes by which metals are 

 separated from the earthy matter. 



Drift. 1. Any loose matter transported by 

 water or ice. 2. = Mine=Heading: an ex- 

 ploratory passage in a tunnel. D. formation 

 =Glacial formation : loose accumulations of 

 sand, gravel, &c. D. penod=Pala>olithic 

 period. 



Drill, (dril)=Cynophalus sp.: a large black- 

 faced baboon. 



Drinker moth=0donestes potatoria. 



Driver, (dri'ver). A general term for any 

 piece of machinery which transmits motion 

 to another. D. aw.=Anomma : named from 

 going in large numbers, and driving insects 

 &c.,. before it. J). spanker : a sail. 



Driving, (dri'ving). D. icheel : the wheel by 

 the revolutions of which motion is com- 

 municated to the machinery, &c. J). point : 

 the point at which motion is communicated 

 by the driver, q.v. 



Dromaius, ( drom-i'us ). [Gk. dromaios, 

 running.] A bird, belonging to Cursores, 

 resembling the ostrich. D. Novce Hollandica 

 =Emeu. D. irroratus; an emu, the male 

 of which is gentle, the female large and 

 quarrelsome. 



Dromatherium, ( drom - a - the ' ri - um ). [Gk. 

 dromaios, running; therion, beast.] A small 

 insectivorous mammal, known by fossil re- 

 mains, found in Trias of America. 



Dromedary, ( drom'e-da-ri ). [ Dromadairc, 

 the French name.] = Arabian camel : an 

 animal, having one hump, belonging to 

 Ungulata. 



Dromilites, ( drom-i-li'tez ). [Gk. dromaios, 

 swift; litheos, stony.] A small crustacean, 

 found fossil in London clay. 



Dromornis, (drom-or'nis). [Gk. drowos, 

 running; ornis, bird.] D. Australia: an 

 extinct struthious bird of Australia. 



Drone, (dron). [Dran, the A.-S. name.]= 

 The male bee. D. .%=Eritalis tenax : an, 

 insect belonging to Diptera. 



