LIST OF ILLUSTRATIONS 



HEAD OF INDIAN MUNGOOSE (HERPESTES SMITHIl\ 



SHOWING HORIZONTAL PUPIL . . . Frontispiece 



PAGE 

 LEAF-FISH 66 



DIAGRAM OF PHYLETIC DIVERGENCE AND PARALLELISM . 70 



PARALLEL DIVISIONS OF ECHINODERMATA . . . . ?I 



PARALLEL DIVISIONS OF VERTEBRATA 72 



PARALLELISM WITH CONVERGENCE AMONGST MAMMALS . 80 



HEAD OF DRYOPHIS PULVERULENTUS IN SIDE VIEW . 93 



EYE OF DUSSUMIERIA, SHOWING PERFORATED ADIPOSE 



EYELID 95 



INTESTINAL TRACT OF DUSSUM1ERIA . . . .109 



DISSECTION OF THE ALIMENTARY TRACT OF CHATOESSUS 



NASUS FROM THE LEFT SIDE IIO 



PARALLELISM WITH CONVERGENCE BETWEEN TWO FAMILIES 



OF FISHES, MUGILIDjE AND CLUPEID-flE . . .112 

 HEAD AND FORE-BODY OF ICHTHYOPHIS GLUTINOSUS, TO 



SHOW THE COLLAR-LIKE RESPIRATORY REGION . 143 



