EXPLANATION OF THE FIGUBES. 



Xlll 



Fig. 



43 Optical diagram . Wagner 



44 Compound eyes of insects and J 



Crustacea . . . Miiller I 



45 Vertical section of the organ of) 



hearing in man . Edwards 



46 Malleus or hammer-bone of the 



internal ear . . South. 



47 Incus or anvil bone ditto. Ibid. 



48 Stapes or stirrup ditto. Ibid. 



49 Chain of bones in situ. Ibid. 



50 Relative situation of the tympa- 



num and labyrinth. Soeinmering 



51 Views of the "labyrinth. Ibid. 



52 Ditto of the cochlea. Ibid. 



53 Ditto of the semicircular canals. 



[Ibid. 



54 Ditto ditto ditto. Ibid. 



55 The cochlea, base and apex. Ibid. 



56 The spiral laminae of the 



cochlea . . . Ibid. | 



57 The external shell of the cochlea ! 



removed . . . Ibid, j 



58 Horizontal section of the coch- 1 



lea ... South | 



59 Front view of the human j 



larynx. j 



60 The larynx of the merganser 



(Merges Merganser) . 



60 A muscular fasciculus of the ox. 



[Wagner 



61 The structure of human muscle. 



[Ibid. 



62 Muscular fibre, after Skey. Skey 



63 Muscles from the back of the 



rattle-snake . Wagner 



64 Muscular fibres from the inver- 



tebrata . . . Ibid. 



65 Muscular fibres from the eso- 



phagus . . . Skey 



66 Streaked muscles of the Scolo- 



pendra Afra . . Wagner 



67 Cilia arising from the epithelial 



cylinders . . . Ibid. 



68 Epithelial cells producing cilia. 



[Ibid. 

 69, 70 Litharaa Websteri. Sowerby 



71 The test of an echinus. Edwards 



72 Apiocrinus rotunda . Miller 

 7.'i Encrimu moniliformis . Ibid. 

 74 Cyprceacdssis rufa. Stutchbury 



Fig. 



75 Astacus Vectensis, from Isle of 



Wight . . Mantell 



75* External skeleton of Dasypus 

 sexcinctus. 



76 The muscular system of the 



perch . . . Cams 



77 The muscular system of the 



Falco nisus . . Ibid. 



78 The skeleton of man. Cheselden 



79 The human cranium . South 

 8083 The temporal bones. Ibid. 



84 The calvaria of the human 



skull . . . Ibid. 



85 The temporal bones . Ibid. 



86 and 87 External and internal 



views of ditto . ; Ibid. 

 88 and 89 Anterior and posterior 



faces of petrous portion. Ibid. 

 90, 90* External and internal views 



of the occipital bone. Ibid. 



91 The sphenoid and ethmoid. Ibid. 



92 The superior and inferior max- 



illaries . . . Ibid. 



93 Internal view of the superior 



maxillary . . .Ibid. 



94 The partition of the nostrils. Ibid. 



95 A vertical section of the or- 



bits, nostrils, and palate. Ibid. 



96 The lateralboundary of ditto. Ibid. 



97 The orbits . . . Ibid. 



98 and 99 Views of the internal 



structure of the nose . Ibid. 

 1 00, 1 1 The internal and external sur- 

 face of the superior maxilla. Ibid. 

 102 The osseous roof of the 

 mouth . . . Ibid. 

 103, 104 External and internal sur- 

 faces of the superior maxilla. 

 [Ibid. 



105 The dorsal vertebrae. Ibid. 

 106, 107 The cervical ditto. Ibid. 

 108 and 109 The atlas . Ibid. 



110 The axis . . . Ibid. 



111 The seventh cervical vertebra. 



[Ibid. 



112, 113 The dorsal vertebra?. Ibid. 

 114 The mode of articulation of 

 the dorsal vertebra . Ibid. 

 115,116 Lumbar vertebrae. Ibid. 

 117 The fifth lumbar vertebra. Ibid. 



