M 



I A |; |. i; ii| COjS T E \ TS 



Crico-hyoid 



Origin und insertions of 



I ;. I ■; i iUoiy muscles in Chclonioidse 



In Chelonia mydaa 



Respiratory muscles in Emydoidse 



In Nei temydoidse 



Ptychemys rugosa 



Ptychemys mobiliensis 



Graptemys geographica 



Malacoclemmys palustris 



Chrysemys picta 

 In Clemmydoidae. 



Nanemys guttata 



Calemys Miihlenbergii 



Glyptemys insculpta 

 In Cistudinina. 



Cistudo Virginea . 

 Table of origin of respiratory muscles of Emydoidrc with dimen 

 Peculiarities of origin of the expiratory muscles in connection w 



ral apparatus of respiration in Chelonians 

 Medulla oblongata ..... 



Par vagnm . • . . • 



Origin and course of 

 Superior laryngeal nerve 



Communicating branch of .... 



Branch to crico-arytenoid muscle 



Branch to crico-hyoid muscle .... 

 Dissection to expose chiasm of superior laryngeal nerve 

 Sensitive fibres of superior laryngeal nerve 

 [nferior laryngeal nerve 

 Origin nml course of 

 Distribution to crico-arytenoid muscle 



inns of 



ith the 



pecies 

 haliits of Emyd 



idss 



r irk 



1 t 

 1 I 



1 I 

 1 1 



1 I 



15 

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17 



17 

 IT 

 IT 



IT 



18 

 IS 

 is 

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19 



10 



CHAPTER II 



PHYSIOLOGY OF THE RESPIRATORY APPARATUS Or CHELONIA 



History of theories of CUelouian respiration 

 R Townson on 



Malpighi on .... 

 Milne Edwards on 



T. Rymer •! ;s on 



Mailer, Carpenter, Agassiz, on . 



I 'i i .mil on . . . «. 



Tauvry, Baro on 



Townson's views mo^t correct 



Views of one of the authors in previous paper 



Divinion of subject for study 



Externally visible phenomena of respiration 



Number of respirations per minute 



Elements of the respiratory act . 



Appearance of glottis 



Function of hyoid apparatus 



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