GENERAL INDEX. 



Page Sec. 



Dental apparatus of Sharks 647 . 1770 



Attachment of the teeth 648 . 1772 



Growth and development of the teeth . . . .... . . . 649 . 1774 



Postlabial valve 650 . 1776 



Arrangement of alimentary canal 650 . 1777 



Pancreatic appendages in osseous fishes 651 . 1780 



Structure of the pancreas in Sharks and Rays 651 . 1781 



Liver and biliary ducts 651 . 1782 



Portal system of veins 651 . 1783 



Spleen 651 . 1784 



Lymphatic and lacteal system 652 . 1785 



Circulation of the blood in fishes 652 . 1786 



Structure of the heart 653 . 1787 



Branchial circulation . . 653 . 1790 



Systemic circulation 654 . 1793 



Kidneys 654 . 1797 



Their minute structure 654 . 1798 



Mucous secretions of the skin 654 . 1799 



Lodgment of the brain in fishes 654 . 1800 



Composition of the encephalon 655 . 1801 



Olfactory lobes 655 . 1802 



nerves 656 . 1803 



Organs of smell 656 . 1804 



Optic lobes and nerves of vision 656 . 1805 



Anatomy of the eye in fishes 656 . 1806 



"Choroid gland" 658 . 1811 



Pedunculated eyes of Sharks and Bays 658 . 1813 



Muscles of the eyeball * . . 658 . 1814 



Nerves of the ocular muscles 659 . 1815 



Absence of lacrymal apparatus 659 . 1816 



Distribution of fifth pair of nerves 660 . 1817 



Auditory nerves 660 . 1819 



Anatomy of the organ of hearing in fishes 660 . 1820 



Glosso-pharyngeal nerve 662 . 1831 



Nervus vagus 662 . 1831 



Spinal recurrent 662 . 1831 



Medulla oblongata 662 . 1832 



Cerebral hemispheres 662 . 1833 



Cerebellum 663 . 1836 



Postcerebellic lobes 663 . 1837 



Spinal nerves 664 . 1838 



Sympathetic system 664 . 1839 



Generative system of the osseous fishes 664 . 1840 



Structure of the ovary or female roe 664 . 1841 



Viviparous fishes ' V V- ! V >.^ . . 665 . 1842 



Testicle or milt of the male in osseous fishes 665 . 1843 



Progressive development of oviduct . . . . r . ' . -. . . . 665 . 1844 



Female generative organs of the Eel and Lamprey . . . . . 666 . 1846 



Male organs of the Eel and Lamprey 666 . 1848 



Female generative system in Sharks and Kays 666 . 1849 



Egg of the Shark i-V^v. . 667 . 1851 



Sexual organs of male CHONDROPTERYGII 669 . 1853 



CHAPTER XXVII. 

 EEPTILIA. 



REPTILIA General characters of the class 670 . 1857 



AMPHIBIA or BATRACHIAN REPTILES . . . . v .' :.' .... 670 . 1859 



Lepidosiren annectans J p'.'*v~v ~v . 670 . 1860 



Siren lacertina . . v -v . . 671 . 1863 



Proteus anguinus .-? . 671 . 1864 



