Owen not only occupied himself with the dissection of rare animals, such as the Pearly Nautilus, Lingula, Limulus, Protopterus, Apteryx, &c., and with the description and reconstruction of extinct reptiles, birds and mammals - following the Cuvierian tradition - but gave precision and currency to the morphological doctrines which had taken their rise in the beginning of the century by the introduction of two terms, " homology " and " analogy," which were defined so as to express two different kinds of agreement in animal structures, which, owing to the want of such " counters of thought," had been hitherto continually confused.
In England, Owen's anatomy of the pearly nautilus,14 Huxley's discussion of the general morphology of the Mollusca,17 and Lankester's embryological investigations, 19 have aided in advancing our knowledge of the group. Two remarkable works of a systematic character dealing with the Mollusca deserve mention here - the Manual of the Mollusca, by Dr S.
The different kinds of mica vary from perfectly colourless and transparent - as in muscovite - through shades of yellow, green, red and brown to black and opaque - as in lepidomelane; the former have a pearly lustre and the latter a submetallic lustre on the cleavage surfaces.
The Pearly Pool, in a.
rend., 188 4, 9 8, p. 1 44) obtained a form which he termed nacre (or pearly) sulphur; the same modification was obtained by Sabatier (ibid., 1885, 100, p. 1346) on shaking hydrogen persulphide with alcohol or ether.
00 2 H 5, is obtained in the form of pearly scales when carbon dioxide is passed into an alcoholic solution of potassium ethylate, C02+KOC2H5 = KO CO.
The shells of the pearly nautilus are commonly used by the Visayans for drinking cups.
The interior of the shell is remarkable for the absence of pearly lustre on its interior surface.
It has the characteristic appearance of pure silk - a brilliant soft white body with a pearly lustre - insoluble in water, alcohol and ether, but it dissolves freely in concentrated alkaline solutions, mineral acids, strong acetic acid and in ammoniacal solution of oxide of copper.
(14) Richard Owen, Memoir on the Pearly Nautilus (London, 1832).
Scouring renders all common silks, whether white or yellow in the raw, a brilliant pearly white, with a delicate soft flossy texture, from the fact that the fibres which were agglutinated in reeling, being now degummed, are separated from each other and show their individual tenuity in the yarn.
The brood of bees, when healthy, lies in the combs in compact masses, the larvae being plump and of a pearly whiteness, and when quite young curled up on their sides at the base of the cells.
Get your pearly whites back in action with the below tips from Joanna.
It has poet sleeves and is accented with pearly buttons and crochet lace trim.
The symptoms of basal cell carcinoma will either be small, pearly nodules or what appear to be flat, waxy scars.
They are available in a wide range of colors from yellow, apricot and orange to salmon, pink, magenta and pearly white.
biscuitggs of the cookie beetle are pearly white, and are not easily seen with the naked eye.
pearly gates by St Peter who led him down the golden streets.
pearly teeth, waved him forward.
pearly kings to serious exhibitions at the London Museum.
pearly white in color.
pearly gray color, small, round, and almost transparent against the light.
The faces of slates have usually a slightly silky lustre due to the abundance of minute scales of mica all lying parallel and reflecting light simultaneously from their pearly basal planes.
Their hair is dark brown or black, straight, wavy or curly; the beard is thin, the face broad, the profile not prominent, the eyes large and expressive, the nose somewhat flattened, the lips thick, the teeth excellent in shape and of a pearly whiteness.
pearly gray being preferred to dark gray or brown-grey birds.
Although baby may be irritable as he begins the teething process, you and he will be proud of those first pearly whites.
There is just something exciting about discovering those first pearly whites peeking through your little one's gums.
This commonplace procedure instantly brings new life to your pearly whites!
One end is filled with the plumper, a pearly product designed to make your lips look fuller, and the other end comes with a sheer gloss-like color.
Used alone, the plumper has a really pretty, pearly look that shines, but not in a little-girl glitter kind of way.
Under Chapstick True Shine Lip Balm: The pearly shine of the lip balm helped mask some of the color and made it sparkle.
Agencies look for candidates who have a beautiful smile, so make sure you show your pearly whites every time you meet someone.
Mother-of-pearl is a popular choice for jewelry makers; its pearly sheen makes it attractive, and its lower price makes it an affordable option.
A sterilized needle can be used to explore the pearly bump at the end of a burrow, remove its contents, and place it on a slide to be examined.
Because Lady Gaga has natural brunette hair, getting her bright platinum blonde takes a double color process and includes pearly pink subtle hair highlights to enhance her hair's shine and gloss for an ultra healthy look.
Dr. Rebecca Castaneda runs this state of the art dental facility, specializing in cosmetic procedures to boost your pearly whites.
Find a cardigan with tiny, pearly buttons for a slightly more old-fashioned feel.
Other interesting stones include the greens of jade and aventurine, or gentle pearly colors of moonstone or opal.
Silver Bracelet Watch with Glitz for Him: Ultra-modern with a brilliant stainless steel case and pearly white dial, this model suits men of all tastes.
The Prima Donna Satin Deluxe Seamless Bra is available in black, natural or pearly pink and is available in sizes from 34B to 42G.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.