202 STRUCTURE AND CLASSIFICATION OF BIRDS 



Besides the hornbills and MacKOchires the cohes are- the 

 only flying birds in which the latissimus dorsi metapatagialis 

 is absent. 



The colies have only the left carotid. 



The stomach is not very muscular. The liver is small 

 and has a gall bladder. There are no cceca. The intestines 

 are short, but capacious, measuring nine inches. 



The syrinx has been figured by Johannes Mullee.' It 

 is quite typically tracheo-bronchial. 



The skeleton and the affinities of Golius have been elabo- 

 rately treated of by Murie.^ 



There are thirteen cervical vertebrae. Four ribs reach the 

 sternum. 



'i'h.e- skull is holorhinal, without basipterygoid processes, 

 and desmognathous. After a careful maceration Gaeeod ' was 

 unable to find a vomer, the presence of which had been 

 previously* asserted (see fig. 95, p. 203). 



TROGONES , eV^ ^ 



Definition. — Peet zygodaotyle by reversion of second toe. . Skull 

 scliizognatlious 'with, basipterygoid processes. Oil gland nude. 

 Iieft carotid alone present. Cseca sliort. Ambiens absent. Of 

 deep plantar tendons n. . hall, supplies I. and II., Fl. dig. III. 

 and IV. Vinouliini joins them before bifurcation of each. 



This family is chiefly American, but also African and 

 Asiatic* 



The feathers of the trogons have very well developed 

 aftershafts. The pterylosis is remarkable for the non- 

 bifurcation of the spinal tract, which is continuous as a single 

 tract to the base of the naked oil gland. It is dilated to form 

 a rhomboidal area behind the scapula. 



There are twelve rectrices. 



' ' Ueber die bisher unbekannten tjipischen VersoliiedenheiteD der Stimm- 

 organe der Passerinen,' Abh. k. Akad. Wiss. 1845. 



'' ' On the Genus Colius, its Structure and Systematic Place,' Ibis, 1872, 

 p. 263. 



' ' Notes on the Anatomy of the Colies (Colius),' P. Z. S. 1876, p. 416. 



^ By MuniE. 



' Trogon galUcus is an, extinct species irom the Miocene of France. 



