LIST OF ILLUSTRATIONS 



HEAD OF INDIAN MUNGOOSE {HERPESTES SMITHIl), 



showing horizontal pupil . . . Frontispiece 



PAGE 



leaf-fish 66 



diagram of phyletic divergence and parallelism . ^0 



parallel divisions of echinodermata 71 



parallel divisions of vertebrata 72 



parallelism with convergence amongst mammals . 8o 



head of dryophis pulverulentus in side view . 93 

 eye of dussumieria, showing perforated adipose 



EYELID 95 



INTESTINAL TRACT OF DUSSUMIERIA . . . . I09 



DISSECTION OF THE ALIMENTARY TRACT OF CHATOESSUS 



NASUS FROM THE LEFT SIDE IIO 



PARALLELISM WITH CONVERGENCE BETWEEN TWO FAMILIES 



OF FISHES, MUGILIDjE AND CLUPEIDjE . . .112 



HEAD AND FORE-BODY OF ICHTHYOPHIS GLUTINOSUS, TO 



SHOW THE COLLAR-LIKE RESPIRATORY REGION . 143 



