268 Dr Brewster on moveable Crystals 
Hab. in Brazilia. Georgius Staunton , baronettus. Sello. Tj . (v. s. in Herb. 
Lamb.) 
Arbor ramis teretibus pubescentibus, cortice cinereo. Folia decussato-oppo- 
sita, bipinnata v. raro simpliciter pinnata, impari-pauci (3-4)-juga, spithamea, 
patentia : pinnis per paria distantibus, 2-5-jugis ; inferioribus subsimpli- 
cibus : foliolis ovatis ellipticisve, acutis acuminatisve, planis, integerrimis 
oppositis, reticulato-venosis, insequalibus, sessilibus, ^-2 uncialibus, 3-lineas 
ad pollicem latis, supra in adultis nudiusculis, nitidis, subtus junioribusque 
tomento copioso tectis. Panicula parva, terminalis, cano-tomentosa. Pedun- 
culi oppositi, filiformes, elongati, 1-3 fiori. Calyces campanulati, pedicellati, 
5-dentati : dentibus ovatis, acutis, sequalibus. Corolla violacea, extus sericea, 
basi tubulosa, superne ampliata, supra depressa, infra ventricosa, limbo 5-loba, 
bilabiata : lobis rotundatis. Stamina 4, didynama filamentis gracilibus glabris 
fornicato-arcuatis ; quinto sterili, elongato, robustiore, cseteris dupld longiore 
et extra limbum producto, barbato, apice clavato. Antherce per paria approxi- 
mate, bilobe : lobis oblongis equalibus divergentibus Ovarium ovatum, com- 
pressum anceps. Stylus fiuformis, gracilis, staminibus longior : stigma bilamel- 
losum : laciniis ovali-oblongis, replicatis. Capsula ovali-orbiculata, compressa, 
sesqui pollicarem longa, latitudine unciali, levis bilocularis, bivalvis : valvis pla- 
nis, crassis, lignosis. Dissepimentum trails versum, utrinque placentiferum, Semina 
in loculo singulo numerosa, imbricata, plana, transversa, margine late foliaceo- 
alata : testa duplex ; exterior crassiuscula, coriacea extus plicato-rugosa, fusces- 
cens : interior membranacea, diaphana : albumen nullum. Embryo magnus, 
foliaceus, lacteus, transversus : cotyledones late obcordato-reniformes, plane, 
applicate, extus convexe : radicida brevissima, subrotunda, centrifuga. 
Species sequentes adhuc valde dubise : 
Bignonia coerulea, Linn, in Sp. PI. 872, quce Arbor Guajaci latiore folio, 
Bignonie flore cosruleo, fructu duro in duas partes dissiliente, seminibus 
alatis imbricatim positis, Catesb. Carol 1. p. 42. t. 42. 
Hab. in Bahame insulis presertim Providentie juxta urbem Nassau. Ca- 
tesby. Tj . 
Jacaranda Brasiliana, Lam. Encycl. 1. p. 420, qua Bignonia Brasiliana, Willd, 
Sp. PI. et Jacaranda II., Pis. Eras. 1G5. 
Art. XII. — On the Existence of a group of Moveable Crystals 
of Carbonate of Lime in a Fluid Cavity of Quartz *. By 
David Brewster, LL. D. F. B. S. Lond. & Sec. R. S. Edin- 
burgh, &c. &c. 
.Although particles of opaque solid matter have been observed 
in the cavities of crystals containing fluid, yet, so far as I can 
find, no crystallized body, and, indeed, no matter capable of 
crystallization, has ever been discovered in them. The quanti- 
ties of saline impregnation, indicated by a scarcely perceptible 
cloudiness in solutions of silver and muriate of barytes, were so 
minute in Sir Humphry Davy’s experiments, that he considered 
* This article forms Sect. VII. of our author’s paper on the New Fluid, an ab* 
stract of part of which was given in this volume, p. 91. 
