THE EYE 403 
retina infiltrated by gelatinous material. Humors are watery, non-suppu- 
rative, but the fundal portion of the retina shows several poorly circum- 
scribed, yellowish white, gelatinous collections. Microscopical section 
of cornea shows replacement of normal bundles by wavy ones inter- 
mixed with small numbers of nuclei. These are never of inflammatory 
type, but always of connective tissue type. Conjuctival mucosa defec- 
tive in centre, puckered but shows no subjacent inflammatory features. 
Ciliary body richly infiltrated by lymphocytes and vessels distinctly 
congested. This condition extends over whole anterior surface of iris 
and for a short distance over posterior. Sclera shows much bone for- 
mation. Chronic interstitial keratitis, subacute interstitial iritis and 
cyclitis. 
Cataract. 
Opacities of the cornea are quite common among our 
specimens, most often due we believe, to local trauma; 
ungulates exhibit them more than other varieties. Cata- 
ractous opacities of the lens are frequently observed in 
senile animals but, while I have no figures for the state- 
ment, I believe they are not as common among our 
specimens as can be observed in domestic horses and 
dogs. No record has been made of streaky clouds or spots 
in the lens but only of complete opacities. There are three 
only, an aoudad {Ovis tragelaphus) a macaw (Ara macao) 
and a summer duck (Aix sponsa) the last of which alone 
is interesting. This bird, a fully developed adult female, 
was killed because of total blindness and found to have a 
low grade chronic pancreatitis and a bilateral Morgag- 
nian cataract, the lens capsule containing a thin cloudy 
fluid with the nucleus quite freely movable in it. 
Amblyopia. 
A very interesting case of amblyopia in a young 
monkey was studied and reported by Dr. H. M. Langdon 
and Doctor Cadwalader in the Journal of Comparative 
Pathology and Therapeutics, Vol, XXVIII, Part 4, 
Because of its unusual character and careful investiga- 
tion, the report is reproduced here : 
Pigtailed macaque {Macacus nemestrinus) was bom June 9, 1913, 
in the monkey house, a well developed baby. He thrived and was as 
