RATIT.E 



Tinamiformes 



Martineta Tinamou. Calodroma elegans. Plate V. 



The background coloration is, in the main, a deep gray, the lower 

 half merging into dull orange. The whole of the fundi is covered by 

 a collection of tiny dots packed closely together. In the upper half 

 of the field they are white, but from the region of the disc and down- 

 wards they become a dull orange colour. Crossing the fundus and 

 running vertically on either side of the papilla are several orange-red 

 choroidal vessels. 



The macula appears as a dull-gray area, with a brilliant white 

 central spot surrounded by a small, and a pale-green, streaked, 

 reflex ring. It is plainly visible on the nasal side of the pecten. 

 The optic nerve is oval in shape and exceptionally broad. 



The mass of the pecten almost completely covers the optic 

 papilla, which is quite white and looks like a mass of coarse opaque 

 nerve fibres. The optic margins are bordered with gray pigment, 

 from which spring a few short opaque nerve fibres. The pecten is 

 chocolate brown, and in addition to its massive appearance is much 

 shorter than the same organ in most of the birds examined. It is 

 easy to see that it is fringed all round with pointed tabs, that the 

 central portion or ridge is serrated and that it comes well forward 

 towards the lens. 



CARINATiE 

 Galliformes 

 Yarrell Curassow. Crax globosa. Plate VI. 



The eyeground is a dull, leaden gray, covered with tiny, white 

 dots. There are no visible choroidal vessels. 



The papilla appears as a long oval, whose central zone is dull 

 orange mingled with minute, dark-brown dots. It also presents a 

 marginal fringe of white. A few opaque nerve fibres extend on either 

 side of the disc across the fundus, but for a short distance only. 



The pecten, of spiral form, is colored dark chocolate-brown. It 

 seems to taper quite decidedly where it joins the disc, and looks 

 like the roots of a tree at its distal end, where the rootlets bury them- 

 selves in the disc. Just above the disc, some little distance to the 

 nasal side of the pecten, is a round, grey, softly outlined area near 

 which is seen a well marked reflex of a pale blue-green tone. 



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