xu 



LI^T OF ILLUSTRATIONS 



no. 



833. 



834. 



835. 



836. 



837. 



838. 



839. 



840. 



841. 



842. 



843. 



844. 



845. 



840. 



847. 



848. 



849. 



850. 



851. 



852. 



853. 



854. 



855. 



856. 



857. 



858. 



859. 



8<i0. 



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 

 Uroloplms testacous, skeleton 



Heptanchus, skull 



Torpedo-Ray, showing electric organ . 

 Cestracion galeatus, egg-case 

 Pristiurus, section of blastoderm 



formation of me.soderm 

 Elasmobranch embryo, sections . 

 Scyllium canicula, embryo . 



Ray, embryo 



Elasmobranch embryo with yolk-sac . 

 Scyllium canicula, head of embryo 



, , , . . , later stage 



Chinuera and Callorhynchus 

 ,, vertebral column . 



skull ...... 



Callorhynchus antarcticus, skull . 



brain 



male urinogenital 

 embryo in egg 



organs 

 shell 



Salmo fiirio 



,, head 



,, scale 



,, vertebrjf .... 



,, caudal end of vertebral columi 



■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 rutlienus .... 

 Tje])idi)steus ])latystoiuus 



Amia calva 



Rita bucliaiiani ..... 



<Tadus niorrhua 



Sebastes pcrcoides 



Labrichthys psittacula .... 

 Ostracion 





