CLASS I. ANNELIDES. CONTAINS FOUR FAMILIES. CLASS II. CIRRHIPEDES. HAS BUT ONE FAMILY. CLASS IV. MOLLUSCA. TWENTY-TWO FAMILIES. GLOSSARY OF TERMS USED IN CONCHOLOGY. INDEX TO THE CLASSES, FAMILIES, GENERA, AND PLATES. Transcriber’s Note: The cover image was created by the transcriber and is placed in the public domain. A |