vi 



PAGE 



OrderlV. Monornyaria 21 



" 18. Rudista 22 



Sub-Branch Molluscoidea ....... 23 



Class Tunicata 23 



Order 19. Saccobranchia 23 



" 20. Dactylobranchia 24 



" 21. Taeniobranchia 24 



" 22. Larvalia 24 



Class Brachiopoda .25 



Order 23. Artliropomata 25 



" 24. Lyopomata 20 



Class Polyzoa . 27 



Order 25. Phylactolsemata 27 



" 26. Gymnolseiuata 27 



" 27. Rhabdopleurae 30 



III. LIST OP AUTHORS REFERRED TO 31 



v 



IV. INDEX 45 



