206 



GENEBAL ORNITHOLOGY. 



Pig. 101. — Eospiratory and vocal organs of the Book, Corvu) fHiffilegiit, an Osolne Passerine bird; nat. size, 

 after MacgilUvray. 1. a, tongue; b, ba«i-brancMal, commonly caHed nro-liyal ; c, c, liorns ot hyoid bone; d,d, 

 genio-liyoid muscles; e, e, stylo-liyoid muscles; /,/, cleido-hyold muscles; g, h, i, oesophagus; j, proventriculus; 

 or secretory stomach; k, gizzard, or gigerium, the muscular stomach ; I, m, n, n, intestine, duodenum to rectum ; 



