The crystals are feebly doubly refracting, and in polarized light exhibit a banded structure parallel to the cube faces.
Its appearance is sufficiently striking - the head and lower parts, except a pectoral band, white, the former adorned with an erectile crest, the upper parts dark grey banded with black, the wings dusky, and the tail barred; but the huge bill and powerful scutellated legs most of all impress the beholder.
The wing-quills are brownish black, banded with mottled white, and those of the tail, except the middle pair, which are wholly greyish brown, are banded with mottled white at the base and the tip, but dark brown for the rest of their length.
In this situation it becomes much swollen and banded with colours, and produces a large number of ecaudate cercariae.
The name scaly anteater is applied to the pangolin; the banded anteater (Myrmecobius fasciatus) is a marsupial, and the spiny anteater (Echidna) is one of the monotremes (see Marsupialia and Monotremata).
Lastly, we have the banded wallaby, Lagostrophus fasciatus, of Western Australia, a small species characterized by its naked muzzle, the presence of long bristles on the hindfeet which conceal the claws, and also of dark transverse bands on the lower part of the back.
The young men of the upper classes assumed the Greek hat, and were banded together into a gild of ephebi on the Greek model.
The land mammals of Greenland are decidedly more American than European; the musk-ox, the banded lemming (Cuniculus torquatus), the white polar wolf, of which there seems to have been a new invasion recently round the northern part of the country to the east coast, the Eskimo and the dog - probably also the reindeer - have all come from America, while the other land mammals, the polar bear, the polar fox, the Arctic hare, the stoat (Mustela erminea), are perfectly circumpolar forms. The species of seals and whales are, if anything, more American than European, and so to some extent are the fishes.
Many of the Syrphidae are banded black and yellow and present a general resemblance to wasps, especially when they alight, the resemblance being enhanced by a twitching action of the abdomen imitating the similar action so familiar in species of stinging hymenoptera.
In the 17th century the lovers of the new philosophy, the investigators of nature by means of observation and experiment, banded themselves into academies or societies for mutual support and intercourse.