PLATE XL VII. 



DEEP VIEW OF THE PTERYGOID REGION AND SIDE OF 

 NECK, GASSERIAN GANGLION, MUSCLES OF TONGUE. 



This dissection is a continuation of the one in Plate XLVI. ; the left side of the 

 jaw having been completely removed to near the symphysis ; the tongue was drawn out 

 and fastened by a stitch to the tip of the nose, while the great wing of the sphenoid was 

 chiselled away to expose the Gasserian ganglion. The styloid process was next cut off 

 to expose more completely the structures lying deep to it. 



Between the tensor and levator palati muscles is a whitish band ; this is the car- 

 tilaginous portion of the Eustachian tube, which was left unlettered from want of space. 



PLATE XL VII. 



MUSCLES 



A Mylo-hyoid. 



B Genio-hyoid, 



C Genio-hyo-glossus. 



D Hyo-glossus. 



E Stylo-glossns. 



F Stylo-pharyngeus. 



G Superior constrictor of pharynx. 



H Middle constrictor. 



I Inferior constrictor. 



J Thyro-hyoid membrane. 



K Thyro-hyoid. 



L Insertion of the sterno-thyroid. 



M Crico-thyroid. 



N Thyroid gland. 



Trachea. 



P (Esophagus. 



R Aponeurosis of pharynx. 



S Levator palati. 



T Tensor palati. 



U Styloid process. 



V Unccal mucous membrane turned up. 



W Rectus capitis lateralis. 



X Inferior oblique. 



Y Superior obliqne. 



Z Transverse process of atlas. 



* Transverse process of sixth cervical 



vertebra. 

 A' Complexus. 

 B' Trachelo-mastoid. 

 C' Splenius. 



D' Levator anguli scapula) 

 E' Trapezius. 

 F' Scalenus medius. 

 G' Scalenus anticus. 

 H'Longus colli. 



I' Eectus capitis anticus major. 

 K' Inferior oblique (oculi). 

 L' Inferior rectus (oculi). 

 M' Superior rectus (oculi). 

 N' External rectus (oculi). 

 0' Levator palpebras. 

 P' Lachrymal gland. 

 R' Dura mater of middle fossa of skull. 

 8' Antrum of Highmore. 

 T A portion of the submaxillary gland. 

 U' Wharton's duct. 



