BOM 



DOR 



calyx four-leaved ; corolla none ; capsule 

 three-celled, inflated ; seeds in couples. 

 There are two species, viz. D. viscosa, 

 broad-leaved dodonaea, and D. angustifo- 

 lia, narrow-leaved dodonaea. The former 

 is a native of the countries between the 

 tropics ; the latter is found at the Cape 

 of good Hope. 



DOG. See CANIS. 



Dog days, the same with those called 

 canicular. See CASICUIAR days. 



DOLABRIFORM, in natural history, 

 hatchet shaped. 



DOLICHOS, in botany, a genus of the 

 Diadelphia Decandria class and order. 

 Natural order of Papilionaceae, or Legu- 

 minosae. Essential character : two paral- 

 lel oblong calluses at the base of the 

 standard, compressing the wings under- 

 neath. There are thirty-eight species ; 

 most of these are annual, and natives ei- 

 ther of the East or West Indies. They 

 are chiefly herbaceous, with twining 

 stalks: the flowers are frequently in 

 spikes, and axillary ; the legume is often 

 smooth, sometimes villose, or pruni- 

 ent. Mr. Millar affirms, that he has cul- 

 tivated more than sixty, besides many va- 

 rieties. 



DOLIOCARPUS, in botany, a genus of 

 the Polyandria Monogynia class and or- 

 der. Essential character : calyx five-leav- 

 ed ; corolla three-petalled, plaited ; stig- 

 ma sub-bifid ; berry globulaiv crowned 

 with a style, one-celled, two-seeded 

 There are three species. 



DOLPHIN. See DELPHINUS. 



DOMBEYA, in bolany, so called in me- 

 mory of Jos. Dombey, a genus of the 

 Dioecia Monadelphia class and order. Na- 

 tural order of Coniferae. Essential cha'-ac- 

 ter : male, calyx of the ament ; scales ter- 

 minated by a leaflet ; corolla none ; an- 

 thers ten or twelve, without filaments. 

 Female, calyx ament, with many germs ; 

 corolla none ; stigma bivalve, unequal ; 

 seeds many, in a roundish strobjle. There 

 is but one species, vi*. D. chilensis, a tree 

 very little known, of a resinous nature, in 

 some respects allied to protea ; and also 

 to the pines in some particulars of its 

 fructification ; the trunk is straight, and 

 of considerable height ; the wood is white, 

 solid, and clothed with a kind of double 

 bark. The flowers are mule and female, 

 borne on different individuals, and hang 

 in sessile solitary catkins from the top of 

 the branches. A native of Chili. 



DOME, in architecture, a spherical 

 roof, or a roof of a spherical form, raised 

 ov.er the middle of a building, as a church, 



hall, pavilion, vestibule, stair-case, &c. by 

 way of crowning. See ARCHITECTURE. 



DOMESDAY, or DOOMS-BAT-BOOK, a 

 very ancient record made in the time of 

 William the Conqueror, which now re- 

 mains in the Exchequer, and consists of 

 two volumes, a greater and a less ; the 

 greater contains a survey of all the lands 

 in most of ,the counties in England, and 

 the less comprehends some counties that 

 were not then surveyed. The book of 

 domesday was begun by five justices, 

 assigned for that purpose in each county, 

 in the year 1081, and finished in 1086. It 

 was of that authority, that the Conqueror 

 himself submitted, in some cases where- 

 in he was concerned, to be determined 

 by it. Camden calls this book the tax- 

 book of king William ; and it was farther 

 called magna rolla. There is likewise a 

 third book of domesday, made by com- 

 mand of the Conqueror ; and also a 

 fourth, being an abridgement of thejother 

 books. 



DOMINICAL letter, in chronology, is 

 that letter of the alphabet which points 

 out in the calendar the Sundays through- 

 out the year, thence also called Sunday 

 letter. See CHRCHOLOGT. 



DON ATIA, in botany, a genus of the 

 Triandria Trigynia class and order. Es- 

 sential character : calyx three-leaved ; 

 petals nine, twice as long as the calyx, 

 linear oblong ; anthers sub-globular, twin. 

 There is but one species, viz. D. fasci- 

 cularis. 



DONAX, in natural history, a genus of 

 Vermes Testacea. Generic character : 

 animal a tethys ; shell bivalve, generally 

 witli a crenulate margin, the frontal mar- 

 gin very obtuse ; hinge with two teeth, 

 and a single marginal one placed a little 

 behind, rarely double, triple, or none. 

 There are nineteen species. D.scortum 

 is a triangular heart-shaped shell, with a 

 flat frontal margin. It inhabits the Indian 

 ocean ; cinereous, mixed here aad there 

 with violet, within snowy, except near the 

 hinge, which is violet ; marginal teeth, 

 double in each valve, with an intermediate 

 cavity. D. scripta inhabits the coast of 

 Malabar, it is elegantly painted with an- 

 gular reddish, blue, or brown lines ; the 

 hinge something resembles that of a 

 Venus. 



DOOR, in architecture, an aperture in 

 a wall, to give entrance ,and exit into and 

 out of a building, or any apartment there- 

 of. See AKCHITECTUKE. 



DOR/ENA, in botany, a genus of the 

 Pentamlria Monogynia class and order. 

 Essential character : corolla five -cleft ; 



