XVI CONTENTS. 



PAGE 



Order II. Lamellibranchiata u . . . 723 757 



Fam. n. Oslracea 725727 



in. Pectinidea 727 728 



iv. Malleacea 729 731 



v. Mytilacea 731733 



,, vi. Arcacea 733 734 



vn. Trigoniacea 734 



vin. Na'iadea 734 737 



ix. Carditacea 737 



x. Chamacea 737738 



Rudista, 738 739 



,, xi. Tridacnacea 739 740 



xii. Cardiacea . 740 741 



xni. Veneracea . 741 743 



xiv. Cydadea 743744 



xv. Lucinacea 744745 



xvi. Saxicavina 745 746 



xvn. Tellinacea 746 748 



xvin. Mactracea 748 750 



xix. Myacea 750 752 



,, xx. Pholadomyacea . . . ... . . 752 753 



xxi. Solenacea 753 754 



xxii. Pholadacea . . 754 75^ 



xxin. Tubicola 756 757 



CLASS XIII. MOLLUSCS. (Mollusca) . . . 758 831 



Systematic Arrangement of Molluscs 772 831 



Order I. Pteropoda 772 776 



Fam. I. Hyakacea 773775 



II. Clioldea 775 776 



Order II. Gasteropoda 776 817 



Fam. in. Heteropoda 776 778 



iv. Dermatobranchiata . . . . % . . 778 784 



,, v. Hypobranchiala 784 785 



,, VI. Pkurobranchiata 785 788 



,, VII. Cyclobranchiata 788 791 



,, VIII. Aspidobranchiata 791 793 



,, IX. Aulobranchiata 793 



X. Ctenobranchiata 793 8n 



xi. Pneumonica, 811817 



Order III. Ceplwlopoda 817831 



Fain. xn. Nauiilacea . . . . . . . . 825 828 



xin. Sepiacea 828 830 



xiv. Octopoda 830831 



Explanation of Plates 833 844 



Index of Generic Names 845 53 



