LIST OF ILLTJSTKATIONS. 



Human Hair 



Hog's Bristles 



Fibre of Sheep's wool . 



Hair of Cat . 



Hairs of Mole 



Hair of Sable 



Hair of Mouse 



Tip of Small Hair of Mouse 



Hair of Bat . 



Hair of Indian Bat 



Tip of Hair of Dermestes 



Barb of Clothing Feather of 



Fowl 

 Barb from Goose-quill . 

 Scales of Perch . 

 Scales of Gold-fish 

 ■Scale of Flounder 

 Scales of Pike 

 Spicula of Gold-fish's Scale 

 Blood-disks 



Circulation in Frog's Foot 

 Perophora . 

 ■Cuttle-shell . 

 Section of Nacre from Pearl 



Oyster 

 Toogue of Trochus 

 Structure of Eye of Snail 

 Leafy Sea-mat 

 Doubling and Hooks in a 



Bee's Wing 

 Scales on a Gnat's Wing 

 Bristle-tail . 

 Scale of Bristle-tail 



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II 



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 41 



43 



48 

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74 

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^*- 



Battledore scale of Polyom 



matus Alexis . 

 Fringed Scale of Pieris 

 Scales of Diamond-beetle 

 Air-pipe of Fly . 

 Spiracle of Fly 

 Spiracle of Leather-coat 

 Spiracle of Cockchafer-grub 

 Grub of Chameleon-fly 

 Foot of Fly . 

 Foot of Water-beetle . 

 Sting of Bee 

 Gall-fly, and Mechanism of 



Ovipositor 

 Outer Saw of Saw-fly . 

 Inner Saw of Saw-fly . 

 Mouth of Beetle . 

 Jaws of Bee 

 Lancets of Female Gnat 

 Tongue of Blow-fly 

 Sucker of Butterfly 

 Antenna of Cockchafer 

 Antenna of Oak Egger Moth 

 Ear of Crab . 

 Daphnia 



Cypris .... 

 Zoea of Shore-crab 

 Second Stage of Shore-crab 

 Third Stage of Shore- crab 

 Adult Shore-crab 

 Hand of Barnacle 

 Young of Barnacle 

 Fang of Spider . , 



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