of the Tongue of the Chameleon. 177 



b Slerno-ceraloid. c. Omo-hyoid. d Internal genio-hyoid. e External genio- 

 hyoid, f External cerato-maxillary. g Middle cerato-maxillar^-. h Inter- 

 nal ceralo-maxillary. w Internal jugular vein, y Carotid artery, z Lin- 

 gual artery. E Prehensile portion of the tongue appearing in the mouth. 

 H Plaited condition of the erectile portion. 



Fig. 3d — Superior surface of the Tongue an seen wheit protruded at the will of the 



animal. 



E Prehensile portion. F The pouch. G Mucous gland. H Erectile por- 

 tion. K Upper jaw. nn Vessels of the tongue. 



Fig. 4th. — View of the Tongue as it appears when drawn from the Mouth after 

 Death. 



A The style. BB Anterior cornua. CC Posterior cornua. E Prehensile 

 portion. F The pouch. G Mucous gland. H Erectile portion, iiii Hyo- 

 glossi muscles, nn Vessels as seen in the erectile portion without injection. 



Fig. 5th. — Dissection of the Prehensile and Erectile portimis. 



kkk Investing membrane and vascular tissue laid open. F The pouch. 

 11 Retractor muscles of pouch, m Under surface of mucous gland, nn Ves- 

 sels of the eiectile portion, some containing quicksilver, oo The annular 

 muscle which surrounds the tube, laid open on one side to shew pp The tube. 



Fig. 6. — Dissection of the Heart and Vessels. 



A The style, ii Hj^o-glossi muscles, h Internal cerato-maxillary muscle. 

 L The trachea, r Thyroid gland. M Membranous bag at top of larynx. 

 N Lungs. O Liver, s Ventricle of heart, tt Right and left auricles, 

 uu Aorta, v Great venous dilatation, w Internal jugular vein, x Lin- 

 gual vein of right side, y Carotid artery. /. Lingual arterj'. 



Fig- 7th — This figure is intended to eaplain the manner in which I conceive llie 

 prehensile and erectile portions are fitted on the style when in the mmith. 



E The prehensile portion. H The erectile portion thrown into plaits, 

 some of which lie round the style, others overlap the back part of the prehen- 

 sile portion. 



Fig. 8th — M. df la Hirers Drawing of the Elastic Tendons., ^c. 



BABA The tendons by which the tongue is kept in a state of constant 

 elongation. CC The longitudinal muscle by which it is retracted. 



APRIL — JUNE 1829- M 



