VI 



Order 17. Monomyaria 

 " 18. Rudista 

 Sub-Branch Molluscoidea 

 Class Tunicata 



Order 19. Saccobranchia 

 " 20. Dactjlobranchia 

 " 21. Taeniobranchia 

 " 22. Larvalia 

 Class Braehiopoda 



Order 23. Arthropomata 

 " 24. Lyopomata . 

 Class Polyzoa .... 



Order 25. Phylactolsemata 

 " 26. Gymnolseraata 

 " 27. Rhabdopleurse 



III. List op Authors referred to 



IV. Index 



PAGE 



. 21 

 , 22 

 . 23 

 , 23 

 . 23 

 , 24 

 , 24 

 , 24 

 . 25 

 , 25 

 , 26 



27 

 . 27 

 . 27 



30 



31 

 45 



