CARINATjE 



Galliformes 



Brush Turkey. Catheturus lathami. Plate VII. 



The eyeground is dull, slaty gray, underlying numbers of fine, 

 light-gray dots. These dots are uniformly scattered over the fundus 

 except towards the nasal side. Here, on a level with the superior 

 end of the optic nerve and in the direction of the macular area, they 

 are of a more brilliant white, are closely packed together, and are 

 devoid of a reflex-ring. 



Extending from either side of the optic disc and running at right 

 angles to that organ are a few, rather fine, semitranslucent nerve 

 fibres, which are lost towards the periphery. 



The optic disc, whose upper end is shaped like the sharp bow of 

 a boat, appears to be composed of a mass of brilliant, white, opaque 

 nerve fibres. 



The pecten, of the usual chocolate brown color, is massive and 

 somewhat club-shaped. It extends well forward towards the lens 

 and tapers rapidly as it approaches the superior end of the nerve. 



Harlequin Quail. Coturnix histrionica. Plate VIII. 



The ocular background is light gray sprinkled with minute 

 granules, which give it the appearance of a rough surface. 



The optic nerve head gives one the visual impression that it is 

 formed of brilliant, white, short, coarse, opaque fibres. Its shape is 

 unusual, being long and narrow, with a rather striking resemblance 

 to the projecting, serrated jaws of the Sword Fish. Extending along 

 each side of the optic disc, at right angles to it, are a few rather pale, 

 thin, opaque nerve fibres. 



The pecten is lighter brown in color than usual, and is very narrow 

 at its junction with the papilla. On either side of it are a few minute 

 dots of brown pigment. The inferior segment of the pecten forms a 

 corrugated, bulky mass which, however, extends well forward into 

 the vitreous cavity to the posterior surface of the lens. 



[126] 



