xiv INTRODUCTION. 



CLA.SS, CRUSTACEA. 



Sub-Class A. Entomostraca. 



ORDER I—CIRRIPEDIA. 



Family a. Lepadid^;. 



Genus 1. Strobilepis. 

 2. Turrilepas. 



Family b. Balanid^e. 



Genus 3. Protobalanus. 



ORDER II.—PHYLLOPODA, 



Family a. Limnadiad k 



Genus 4. Esther ia. 

 " 5. Schizodiscus. 



ORDER III.—TRILOBITA. 



Family a. Calymenid.k. 



Genus 6. Catymene. 

 " 7. Ilomalonotus. 



Family b. Bronteid^e. 



Genus 8. Bronteas. 



Family c. Phacopid.e. 



Genus 9. Phacops. 

 " 10. Dalmanites. 



Sub-genus 1. Hausmannia. 



" 2. Coronura. 



3. Cryphaus. 



4. Odontocephalus. 

 " 5. Chasmops. 



Family d. Acidaspid^e. 



( renus 11. Acidaspis. 



Family e. Liciiad.e. 



( icii us 12. Lichas. 



Sub-genus 1. Terataspis. 



2. Conolichas. 



3. Hoplolichas. 



