Natural History. — Zoology. 191 
of Livonia, that fresh and salt water molluscous animals live 
together promiscuously on the same coasts. M. Freminville 
informed the Philomathic Society of Paris, that he collected 
from the same rocks species of the fresh-water genera Anodontes, 
Unio, and Cyclades, which were intermixed with species of the 
marine genera Tellina, Cardium, and Venus. 
83. Sllli of the Pinna Marina . — The pinna shell occurs on 
the Neapolitan coast, particularly on the shores of Calabria, and 
affords a kind of silk, which, after dressing, is wove with com- 
mon silk, and made into various articles of dress. A pair of 
mens gloves cost 18 carlinis, — womens gloves 18,— pair of 
stockings 6 ducats, — waistcoat 80, and coat 100 ducats. 
84. Lepus variahilis or varying Hare . — This species of hare 
occurs in the alpine districts of Scotland, seldom descends to 
the low country, and never intermixes with the common hare. 
In the north of Europe, there is a species said to be the same 
with our varying hare, but it differs from it in being .larger, 
living in plains, and migrating in troops. The varying hare 
becomes white in winter. This remarkable change takes place 
in the following manner : About the middle of September the 
grey feet begin to be white, and before the month ends, all the 
four feet are white, and the ears and muzzle are of a brighter 
colour. The white colour gradually ascends the legs and thighs, 
and we observe under the grey hair whitish spots, which continue 
to increase till the end of October, but still the back continues of 
a grey colour, while the eye-brows and ears are nearly white. 
From this period the change of colour advances very rapidly, and 
by the middle of November, the whole fur, with the exception 
of the tips of the ears, which remain black, is of a fine shining 
white. The back becomes white within eight days. During 
the whole of this remarkable change in the fur, no hair falls 
from the animal : hence it appears, that the hair actually changes 
its colour, and that there is no renewal of it. The fur retains its 
white colour until the month of March, or even later, depend- 
ing on the temperature of the atmosphere, and by the middle 
of May it has again a grey colour. But the spring change is 
different from the winter, as the hair is completely shed. 
85. Canary-Bird without Feathers . — It is generally suppos- 
ed that birds cannot live without feathers, or that they linger 
