XI 



TABLE OF CONTENTS. 



CHAPTER X. 



FORAMINIFERA, POLYCYSTINA, AND SPONGES. 



Foraminifera . 

 Miliolida . 

 Lituolida . 

 Lagenida . 

 Globigerinida 



PAGE 



482 

 489 

 498 

 500 

 500 



Nummulinida 

 Polycystina 

 Acanthometrina 

 Porifera (Sponges) 



PAGE 



506 



523 



, 526 



527 



CHAPTER XI. 



ZOOPHYTES. 



Hydra 

 Hydrozoa 



Structure of Skeleton 



533 

 537 



Acalephae 

 Ajithozoa 



CHAPTER XII. 



ECHINODERMATA. 



. 555 I Eohinoderm-Larvae 



545 

 550 



I 



568 



Polyzoa 



CHAPTER XIII. 



POLYZOA AND TUNICATA. 



. 576 I Tunicata . 



5S4 



CHAPTER XIV. 



MOLLUSCOUS ANIMALS GENERALLY. 



Shells of Mollusca . . .593 



Tongue of Gasteropods . . 606 



Development of Mollusca . 610 



Ciliary motion on Gills . . 61 S 



Organs of Sense of Mollusks. 619 

 Chromatophores of Cephalo- 

 pods 620 



CHAPTER XV. 



ANNULOSA OR WORMS. 



Entozoa . 

 Turbellaria 



621 

 624 



Annelida 



626 



CHAPTER XVI. 



CRUSTACEA. 



Pycnogonidte . 

 Entomostraca 

 Suctoria . 



636 

 638 

 C45 



Cirrhipeda .... 646 

 Shell of Decapoda . . . 648 

 Metamorphosis of Decapoda . 649 



