Fig. 287. — Columba livia. Dissection from the right side. The body-wall, with 

 the vertebral column, sternum, brain, etc., are in sagittal section ; portions of the 

 gullet and crop are cut away and the cloaca is opened; nearly the whole of the 

 ilium is removed, and the duodenum is displaced outwards, a. ao, aortic arch; 

 bd.j, bd. 2, bile-ducts; b. fabr, bursa Fabricii; cbl, cerebellum; cos, right 

 ccecum; cpdiu, coprodaeum; cr, cere; crb. k, left cerebral hemisphere; crp, 

 crop; cr.v.l, first cervical vertebrae; di, cce, diacoele; dnt, dentary; duo, 

 duodenum; ens. af>, aperture of Eustachian tubes; giz, gizzard (dotted behind 

 the liver); gl, glottis; gul, gullet; Urn, ilium; 2. orb. sp, inter-orbital septum; 

 kd, right kidney; lug, right lung; Ir, liver (right lobe) ; na, bristle passed from 

 nostril into mouth; obi. Sep, oblique septum; o.gl, oil gland; ped, pericardium; 

 ptnx, pre-maxilla; pn, pancreas; pn. b, pineal body; pud. 1-3, pancreatic 

 ducts; pr. cv, right pre-caval; prdm, proctodeum; prvn, proventriculus 

 (dotted behind liver) ; pt. cv, post-caval; pty. b, pituitary body; Pyg. st, pygo- 

 style; r. au, right auricle; r. br, right bronchus; ret, rectum; r, vnt, right 

 ventricle; sp. cd, spinal cord; spl, spleen (dotted behind liver); s. rhb, sinus 

 rhomboidalis; s. scr, syn-sacrum; st, carina sterni; syr, syrinx; tk. v. 1, firstj 

 and tk. v-5, fifth thoracic vertebrae; tug, tongue: tr, trachea; ts, right testis; 

 ur, aperture of left ureter; urdm, urodseum; v. d/> aperture of left vas deferens* 



475 



