LIST OF ILLUSTRATIONS 



FIG. 



833. 

 834. 

 835. 

 836. 



837. 

 838. 

 839. 

 840. 

 841. 

 842. 

 843. 

 844. 

 845. 

 846. 

 847. 

 848. 

 849. 

 850. 

 861. 

 852. 

 853. 

 854. 

 855. 

 856. 

 857. 

 858. 

 859. 

 860. 

 861. 

 862. 

 863. 

 864. 

 865. 

 866. 

 867. 

 868. 

 869. 

 870. 

 871. 

 872. 

 873. 

 874. 

 875. 

 876. 

 877. 

 878. 

 879. 

 880. 



Centrophorus calceus, dermal denticles 

 Scymnus, spinal column 

 Urolophus testaceus, skeleton 



Heptanchus, skull 



Torpedo-Bay, showing electric organ . 

 Cestracion galeatus, egg-case 

 Pristiurus, section of blastoderm 



,, formation of mesoderm 



Elasmobranch embryo, sections . 

 Scyllium canicula, embryo 



Bay, embryo 



Elasmobranch embryo with yolk-sac . 

 Scyllium canicula, head of embryo 



,, ,, ,, ,, later stage 



Chimtera and Callorhynchus 



,, vertebral column . 



,, .skull . .... 



Callorhynchus antarcticus, skull . 

 brain 



Salmo fario 



male urinogenital organs 

 embryo in egg-shell 



, , head 



,, scale .... 



,, vertebrte 



,, caudal end of vertebral column 



skull 



fario, skull disarticulated 

 salar, ,, of young individual . 

 fario, fin-ray . 



,, shoulder-girdle and pectoral fin 



,, pelvic fin . 



,, side dissection .... 



,, brain .... 



,, eye . . . 



,, auditory organ 



,, urinary organs . 



,, development 



,.■ section of blastoderm 

 Polypterus bichir . 

 Acipenser ruthenus 

 Lepidosteus platystumus 

 Amia calva ... 

 Rita buchanani 

 Gadus morrhua 

 Sebastes porcoides . 

 Labrichthys psittacula . 

 Ostracion 



PAGE 



172 

 172 

 174 

 175 

 177 

 181 

 182 

 183 

 184 

 185 

 185 

 186 

 187. 

 187 

 189 

 191 

 192 

 193 

 194 

 195 

 197 

 198 

 199 

 200 

 201 

 202 

 203 

 205 

 208 

 208 

 209 

 210 

 211 

 213 

 214 

 215 

 215 

 216 

 '217 

 218 

 219 

 219 

 219 

 220 

 221 

 221 

 222 

 223 



