Rudiments of Conchology / Intended as a familiar introduction to the science.

by Mary Anne Venning

"Balanus is known to you as the acorn-shell; a genus widely diffused; abounding on rocks, shells, and wood, in large colonies.

CIRRHIPEDA—
SECOND ORDER.

"Acasta is found upon sponge.

"For examples of Creusia, we must examine our madrepores, and other corals; the shells of this genus are either affixed or buried in them.

"Pyrgoma likewise adheres, or penetrates into corals.

"In the 'Penny Cyclopædia,' under the word Cirrhipeda, you will find much useful information, and some plates that will give you a good idea of this class. In the British Museum you may see many of the species, and may thus make yourselves familiar with them.

"2nd Order. Shells pedunculated.

Pentalasmis, (Anatifera.)		Lepas.
Pollicipes.
Cineras.
Otion, ear-barnacle.

"We have already noticed Pentalasmis, or barnacle, ([Plate 2.]) The generic name is changed by later writers; so are those of the two last.