Contents. xiii 



CHAPTER XXXI. 



PAGE. 

 Deuterostomata Schizocoela. Class 1 1, Chaetopoda, .... 209 



CHAPTER XXXII. 



Deuterostomata Epiccela. Class 12, Bryozoa; Order I, Gymnolse- 



raata ; Order 2, Phylactolxmata, 227 



CHAPTER XXXIII. 

 Class 13, Tunicata, 231 



CHAPTER XXXIV. 



Sub-kingdom VI. Mollusca. Division, and Class i, Brachiopoda : 



Order i , Ecardines ; Order 2, Testicardines, . . . .241 



CHAPTER XXX Y. 



-ion 2, Otocardia. Class i, Lamellibranchiata ; Sub-class r, 

 Endocardines ; Sub-class 2, Exocardines; Order I, Mono- 

 mya; Order 2, Heteromya ; Order 3, Isomya, .... 255 



CHAPTER XXXVI. 



I 2, Cephalophora ; Sub-class i, Scaphopoda ; Sub-class 2, 



Pteropoda ; Order i, Thecosomata ; Order 2, Gymnosomata, . 272 



CHAPTER XXXVII. 



Suh- poda; order i. 1'i.inchiata ; Order 2, I'ul- 



monata 280 



MIAI'TKK XXXVIII. 



. Dihran- 

 rhiata, 



CHAPTER XXXIX. 



l.iopol.j. 

 



