° 1918 ] Clark, Anatomy of the Cuban Trogon. 287 



tion. These are however, mostly confined to the head and neck for 

 the humeral, femoral, sternal, ventral and dorsal tracts are very 

 similar to those of Trogon viridis as shown by Nitzsch's description 

 and figures; the dorsal "saddle" however, is elongated elliptical 

 rather than "elongated rhombic," as there are no distinct lateral 

 angles. 



The tracts of the head are entirely separated from those of the 

 lower neck and throat, to a degree and in a manner which I have 

 never seen in any other bird. On the middle of the forehead, be- 

 tween the eyes, is a dense, sharply defined tract, which forks 

 anteriorly, a broad band passing forward and downward to the base 

 of the upper mandible on each side; posteriorly the median tract 

 becomes diffuse and loses itself on the back of the head. There 

 are no contour feathers on the upper surface or on either side of the 

 anterior end of the neck. On the lower surface of the head, be- 

 ginning close to the base of the bill in the median line is a sharply 

 defined tract about five feathers wide which very soon divides, the 

 two branches diverging and narrowing rapidly; each passes up 

 onto the side of the head, where it ends below the ear. The only 

 other contour feathers on the head are in a small tract on each side, 

 just in front of the eye; some few of these feathers extend up over 

 the eye but more comprise a narrow band running from the angle 

 of the mouth to the ear; anteriorly this tract does not quite con- 

 nect with the lateral fork of the forehead tract. 



On the upper side of the base of the neck, the spinal tract begins 

 abruptly with a width of about five feathers; from its very start 

 this tract is dense and well defined. On the lower surface of the 

 neck, a lower cervical tract begins nearly as far forward as the ear; 

 it is six or seven feathers wide and sharply defined from the first. 

 It soon widens and forks, each fork giving rise to a sternal tract. 

 From the anterior end of each sternal tract a branch passes upward 

 onto the shoulder and joins the humeral tract. The outer distal 

 corner of the humeral tract extends outward along the humerus 

 to the elbow, the feathers of this area reminding one of tertiaries. 

 The secondaries are eleven or twelve in number but one or two of 

 those at the elbow are very small and in examination of a skin, 

 there would seem to be but ten; Nitzsch says there are eight to ten 

 secondaries in the trogons. The primaries are ten in number with 



