.18 



ANATOMY IN A NUTSHELL. 



portion by the temporal or petro-squamous suture. It has six points for con- 

 sideration. (Plate CCXLVII.) 



1. Opening of the carotid can \i., which is for tin 1 interna] carotid artery 

 and plexus, is situated near the apex. 



2. A depression for the ( I:iss< ■' i:t n ganglion of the fifth nerve above the 

 carotid canal. 



o. Hiatus Fallopi] is ;i groove which runs outward ami backward. This 

 i- for the »rcai petrosal nerve and branches of the middle meningeal artery. 

 4. Foramen for the small petrosal nerve. 



PLATE CCLXX. 



••4 . 



IANGULAR 4.IGAMEN. 

 • . PERIGNEAL VESS. 



TUBEROSITY OF ISCHIUM 

 NFERIOR /HEMORRHOIDAL VESS 



GREAT SACRO-SCIATIC LIGAMENT. 



INFERIOR PUDENTAL NERVE 

 SUPERFICIAL PERINEAL NERVE 



INFERIOR HAEMORRHOIDAL NERVE 



CUTANEOUS BRANCH OF FOURTH SACRAL 



SUPERFICIAL TRANSVERS'JS PERINAEI 



Showing the Muscles of the Perineum. 



.■>. Eminence over the superior semicircular canal which is near the center 

 of this surface. 



<>. A depression external to the eminence over the tympanum. 



The posterior surface of the petrous portion of the temporal hone forms the 

 anterior pari of the posterior fossa of the base of ihe skull and has the following 

 points for consideration: (Plate CCXLVII.) 



1. Meatus ^UDITORIUS [NTERNUS, which is a short canal at the end of 

 which is the lamina cribrosa. This lamina is perforated by branches of the 

 seventh and eighth nerves, which puss into this opening. 



2. Opening of the \<>i eductus vestibuli which is behind the meatus 



