LIST OF ILLUSTRATIONS xi 



FIG 



PAGE 



742. Muscles and nerves of eye 107 



743. Pineal eye of Hatteria 108 



744. Organ of hearing 109 



745. Section of Ampulla 109 



746 Urinary tabule HI 



747. Diagrams of urinogenital organs . . .112 



748. Development of mesoderm in Frog 114 



749. Petromyzon marinus, external views of head 116 



750. ,, skull, with branchial basket .... H7 



751. 119 



752. ,, ,, dissection of female 121 



753. ,, ,, brain 123 



754. ,, ,, ,, with olfactory and pituitary sacs . . 124 



755. "^^^ " development of olfactory and pituitary sacs. 125 



756. ^H ^ , , auditory organ . 126 



757. v, ,, transverse section of abdomen . . . 126 



758. ,, ,, urinogenital sinus and related parts . . 127 



759. ,, development 127 



760. , , fluviatilis, head of larva 128 



761. Head of Myxine and of Bdellostoma 130 



762. Myxine glutinosa, dissection 131 



763. ,, auditory organ . . . 132 



764. Bdellostoma, kidney 132 



765. Palseospondylus gunni 133 



766. Chiloscyllium modestum . . . . 135 



767. ,, vertebrae 137 



768. ,, skull 138 



769. ,, visceral arches 139 



770. ,, pectoral arch and fin 141 



771. ,, pelvic arch and fin 141 



772. , , lateral dissection 143 



773. ,, branchial sac 144 



774. ,, blood-vessels 145 



775. Scyllium canicula, brain 147 



776. Chiloscyllium, brain 148 



777. Scyllium canicula, cranial nerves and brachial plexus . . . 150 



778. Chiloscyllium, oviducts 152 



779. ,, right kidney and urinary sinus 153 



780. Dog-fish, egg-case 153 



781. Cladoslache fyleri .154 



782. Pleuracanthus ducheni 155 



783. Acanthodes wardi ..." 156 



784. Lamna comubica 157 



785. Urolophus cruciatus 158 



786. Centrophorus calceus, dermal denticles 159 



787. Scymnus, spinal column 159 



788. Urolophus testaceus, skeleton 160 



789. Heptanchus, skull . ... 161 



