288 



PEOF. P. M. Duncan's eeviston of the 



VIII. 



List of Subclasses, Orders, Suborders, Families, Alliances, Divisions, Sub- 

 families, Genera, and Subgenera. List of Genera removed or synonymous with 

 recognized genera. List of Genera formerly recognized and now considered of 

 subgeneric value. Tables. List of new Genera and Subgenera. 



Explanation of terms. 



Subkingdom ECHINODERMATA. 



Class ECHINOIDEA. 



I. Subclass Palaeechinoidea. 

 II. Subclass Euechinoidea. 



I. Subclass Palseechinoidea • 5 



Order I. 

 BOTHRIOCWAEOIDA, p. 7. 



Genus 

 Bothriocidaris, p. 8. 



Order II. 

 PERISCHOECHINOIDA, p. 8. 



Family' I. 

 AROH^OOIDAEID^, p. 8. 

 Genus 

 Lepidocentrus, p. 9. 

 Koninckocidaris, p. 9. 

 Perischodomus, p. 10. 

 Arcbffiocidaris, p. 11. 

 Lepidocidaris, p. 12. 

 Lepidecbiuus, p. 12. 

 Palseechinus, p. 13. 

 Ehoecbinus, p. 14. 



UlUUlUCiil • ^■ 



Family II. MELONITIDiE, p. 15. 



Genus 

 Melonites, p. 15. 

 Oligoporus, p. 16. 

 I/epidesthes, p. 16. 

 Hybochinus, p. 17. 

 Pholidocidaris, p. 18. 



Order III. 

 PLE8I0CIDAB0IDA, p. 19. 



Genus 

 Tiarecliinus, p. 19. 



Order IV. 

 CYSTOCIDAEOIDA, p. 20. 



Genus 

 Eohinocystites, p. 20. 



II. Subclass EuecMnoidea, p. 24. 

 Order I. GII)AEOIBA,^.24i. 



II. DIABEMATOIDA, p. 24. 

 Suborder I. Streptosomata, p. 25. 

 „ II. Steeeosomata, p. 25. 

 Order III. KOLECTYFOIDA, p. 25. 

 „ IV. CLTPEASTBOIDA, p. 25. 



V. SFATANGOIDA, p. 25. 

 Suborder I. Cassidttloidea, p. 25. 

 „ II. Spatangoidea, p. 25. 



