CARINATvE 



Psittaciformes 



Orange-winged Parrot. Chrysotis amazona. Plate XXXIX. 



The general color of the eyeground is a deep gray, tinted with 

 buff. The lower sector and the peripheral zone are suffused with 

 pink, the background generally being punctuated with minute, 

 dull-yellow dots. The macular area is situated towards the nasal 

 side of the disc, a little above the end of the pecten. It is slightly 

 depressed and enclosed with a bright but pale green reflex-ring. 

 Extending from the circumference of this circle, slightly above as 

 well as below, are a few translucent fibres, pale green in tone; and at 

 its centre is a dark-gray dot or depression, with a small, faint halo 

 extending from its upper edge. 



The optic nerve-head looks as if it were composed of coarse, white, 

 opaque fibres, which form a fringe all around the deeply-colored 

 pecten. The papilla is long and boat-shaped and its outlines can 

 be traced the whole length of the pecten. Many fine, gray, opaque 

 nerve fibres extend from the margin of the papilla, cross the back- 

 ground of the eye and are eventually lost in the fundal tissues. 



The deep brown pecten, seen from above, has a spiral form, with 

 a tag or tail-piece at the upper end. A lateral view shows it to be 

 plicated, like a fan. It stands well forward towards the lens, espe- 

 cially its lower half. It has a dark brown color. 



Kakapo. Owl-Parrot. Stringops habro'ptilus. Plate XL. 



The eyeground is orange-red stippled all over with lighter orange 

 dots. The lower half of the fundus has a large number of minute 

 dark, reddish-gray depots of pigment intermingled with lighter dots; 

 also, a great many choroidal vessels run in a vertical direction over 

 the field of view on either side of the optic entrance. They become 

 more numerous towards its lower periphery. 



The macula is placed, as in Owls generally, on the temporal side 

 of the optic papilla, about one disc-length from its upper end and 

 half that distance to the temporal or outer aspect of the fundus. It 

 is a bright orange-red area surrounded by dark, red-gray pigment, 

 like a shadow. There is no circular sheen around it, such as has 

 been noted about other avian fovese. 



The optic nervehead is white, and along its centre appears a net- 

 work of minute, brown pigment dots clustering around the sides of 

 the pecten. A few white opaque nerve fibres extend a short distance 

 on either side and about the upper end of the disc. 



The black-brown pecten extends the whole length of the disc. 

 It is rather straight in its upper half but is more convoluted towards 

 the lower part, where it is quite massive and resembles a corkscrew. 

 It comes well more forward towards the lens, so that it more nearly 

 resembles the same organ in the Burrowing Owl than in the Parrot. 



158 



