x LIST OF ILLUSTRATIONS 



FIG. PAfiE 



697. Amphioxus lanceolatus, transverse sections of pharyngeal and in- 



testinal regions . . ... 40 



698. ,, ,, anatomy, diagrammatic 43 



699. ,, ,, transverse section of pharyngeal region, 



diagrammatic . 44 



700. ,, ,, diagram of vascular system . . 45 



701. ,, ,, nephridium ... . 47 



702. ,, ,, brain and cerebral nerves . 48 



703. ,, ,, anterior portion of neuron . 49 



704. ,, ,, segmentation of the oosperm 50 



705. ,, ,, formation of gastrula 51 



706. ,, ,, development of notochord, neuron, and 



mesoderm 52 



707. ,, ,, advanced embryo . . 53 



708. ,, ,, young larva . . 54 



709. ,, ,, more advanced larva . . 55 



710. ,, ,, development of atrium 56 



711. ,, ,, ,, ,, transverse sections. 57 



712. Ideal Craniate . 61 



713. Section of skin of Fish ... 62 



714. Muscular system of Dogfish . , ... 63 



715. Ideal Craniate, anatomy . . 65 



716. Vertebral column of embryo, transverse section . 66 



717. Diagram illustrating segmentation of vertebral column . 67 



718. Elements of embryonic cranium . 68 



719. Diagrams of cartilaginous skull 70 



720. Diagrams of bony skull ... 73 



721. Development of pelvic fins, diagram . 75 



722. Diagrams of limbs and limb-girdles 76 



723. Transverse section of intestine 79 



724. Structure and development of tooth . 80 



725. Structure of liver, diagrammatic . 81 



726. Diagram of gills 83 



727. Diagram of vascular system of Fish 85 



728. Diagram of circulation in a Fish 88 



729. Diagram of vascular system of embryo of air-breathing Vertebrate 89 



730. Diagram of heart of Amphibian and Crocodile . 90 



731. Blood corpuscles of Frog and Man 91 



732. Transverse section of spinal cord . 93 



733. Diagrams of Craniate brain '.."") 



734. Diagram of cerebral and anterior spinal nerves . 98 



735. Organs of touch . 101 

 731). Organs of the lateral line . 102 



737. Taste-buds . 103 



738. Olfactory cells . 103 



739. Section of eye . . 104 



740. Diagram of retina . 105 



741. Development of eye . 106 



