"There is but one species of Tellinides from the island of Timor. The genus Corbis is fossil, with one exception, Corbis fimbriata, from the Indian Ocean. Lucina is a pretty genus of shells. L. carnaria is frequently found in collections. The interior of the valves is of a deep red colour: the muscular impressions are very distant from each other; one is greatly lengthened out; the valves delicately striated. Capsa is taken, you perceive, from Donax.

"Tellina is found fossil on the borders of the Red Sea, also in the county of York. Of Donax and Mactra the fossil species are few.

"In the third section of this order we find six families. 1st. Conchæ, which are of two kinds, fluviatic, living in fresh-waters; and marine, or living in the sea. Of the first are,

Cyclas, taken from Tellina.
Cyrene, partly from Tellina and Venus.
Galathea, Venus paradoxa, (one species.)

"Cyclas rivicola ([Plate 9].) will give you an idea of this genus: it is Tellina cornea of Linnæus. The species are very common in lakes, rivers, and ponds: it abounds in river-sand, from which you may often procure perfect specimens. Lamarck observes that it is rare in France; but appears common in the Thames.

Plate 9.

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