396 



ZOOLOGY 



SECT. 



. 

 i.orb.sjy 



arises from the pubis, passes along the inner surface of the thigh, 

 and is continued into a long tendon which comes round to the 

 outer side of the knee, enclosed in a special sheath, and, continuing 

 down the leg, joins the superficial 

 flexors of the digits. 



Digestive Organs. The mouth 

 (Fig. 1040) is bounded above and 

 below by the horny beaks, and there 

 is no trace of teeth. The tongue 

 (tng) is large and pointed at the 

 tip. The pharynx leads into a 



th.V.f 



lh.v.s 



wVttP# 



'*jsr"6 



r.t/nl 



fed 



FIG. 1040. Columba liyia. Dissection from the right side. The body-wall, with the vertebral 

 column, sternum, brain, &c., are in sagittal section ; portions of the gullet and crop are cut 

 away and the cloaca is opened ; nearly the whole of the ileum is removed, and the duodenum 

 is displaced outwards, a. ao. aortic arch ; M. 1, bd. 2, bile-ducts ; b.fabr. bursa Fabricii ; 

 cbl. cerebellum ; ecu. right caecum ; cpdm. coprodseum ; cr. cere ; crb. h. left cerebral hemi- 

 sphere ; crp. crop ; cr. v. 1, first cervical vertebrae ; di.cce. diaccele ; dnt. dentary ; dvn. 

 duodenum ; eus. ap. aperture of Eustachian tubes ; giz. gizzard (dotted behind the liver) ; 

 gl. glottis ; gul. gullet ; Urn. ileum ; i. orb. sp. inter-orbital septum ; M. right kidney ; 

 Ing. right lung ; Ir. liver (right lobe) ; na. bristle passed from nostril into mouth ; obi. xep. 

 oblique septum ; ol. g. oil-gland ; pcd. pericardium ; pinx. premaxilla ; pn. pancreas ; pn. b. 

 pineal body ; pnd. 1 3, pancreatic ducts ; pr. cv. right pre-caval ; prdm. proctodseum ; prvn. 

 proventriculus (dotted behind liver) ; pt. cv. post-caval ; pty. b. pituitary body ; p't/ft. xt. 

 spygostyle ; r. a. right auricle ; r. br. right bronchus ; ret. rectum ; r. vnt. right ventricle ; 

 p. cd. spinal cord ; spl. spleen (dotted behind liver) ; s. rhb. sinus i-homboidalis ; s. scr. syn- 

 sacrum ; st. carina sterni ; syr. syrinx ; th. v. 1, first, and th. v. 5, fifth thoracic vertebra ; 

 tng. tongue ; tr. trachea ; ts. right testis ; ur. aperture of left ureter ; urdm. urodseum ; r. <lf. 

 aperture of left vas deferens. 



wide and distensible gullet (gul.) which soon dilates into an 

 immense reservoir or crop (crp.) situated at the base of the neck, 

 between the 'skin and the muscles, and immediately in front 

 of the sternum. In this cavity the food, consisting of grain, 

 undergoes a process of maceration before being passed into the 



