TROGONKS. 



l()l 



Order III. TilOGONES *. 



[C'f. Sccbohm, t. c. p. 8; and Birds of Japanese Empire, p. 15i).] 



A. Second digit reversed. The front plantar (^flexor jyi'^'/orau.'i 



digiforum) split into two to lead to the two front toes, and 

 the hind plantar {Jiexoi- loiujus hallucU) split to lead into 

 the two hind-toes. 



B. Palat(! schizoffnathous. 



Left foot of Harpacfcs dnvauceli, to show tlie plantar t(;nd(iiis. 

 F.P. Flexor perforans digitoruni. F.Il. Flexor longus liallucis. 



C. Basipterygoid processes present. 



D. Spinal feather-tract well defined from nape to oil-gland, and 



not forked. 



E. Young, when hatched, hel[)less, and not passing through 



a downy stage. 



* Clf. Forbes, P. Z. S. 1881, p. 8-36 ; Eyton, Osteol. A v. pi, 12. fi;:-. 2 

 (])al.atine bones of Ilarpacfes rfimrardti). 



I'AKT 111. M 



