The authors quantitated the chemical components in the aqueous humor and the serum in eight anesthetized horses and thirty-one fractured horses to euthanasia. The chemical components of the serum were within normal range through the cases. The values for sodium, potassium, chloride and glucose in the aqueous humor were same as in the serum, while calcium, inorganic phosphate and total protein were less in the aqueous humor than in the serum. The chemical components and the enzyme activities in the aqueous humor were compared with the left and right eyes on the same horses. The values of chemical components of the aqueous humor were same in both eyes and the enzyme activities were low as regards LDH and GOT in the right eyes.

眼漏増量，眼球突出，角膜白濁，瞬膜露出瞳孔散大および瞳孔反射消失などの眼症状が多発する日本白色在来種ウサギのクローズドコロニーを病理組織学的に検索し，その本態が牛眼症（先天性緑内障）である事を知った。乳のみウサギ7例を含む一見健常な症例24例の左右眼球および中枢神経系についても検索したところ，緑内障の存在を示唆する病変が16例(67%)に存在していた。今回の症例におけるフォンタナ腔および強膜静脈洞の変化は眼内圧上昇に起因する圧迫萎縮であり，本症が同部位の低形成ないし無形成によって発現するという従来の通説に疑問を抱いた。

Since 1975, photographs on ccular fundus of over 23 species belonging to Anthropoidea and Prosimii were collected.

A portable fundus camera made by Kowa Co., Type RC-2, was used for regular and fluorescein or indocyanin green angiographies under the anesthetic condition of investigated primates. Narrow or other gelatin filters were used for above regular snap or angiography of retina.

Generally, figures of Anthropoid's fundus were in same pattern. Oval or round optic discs were fresh and milky in color, and clearly distinguished from surrounding tissue. Retina was well pigmented excluding Owl monkey in South America.

In Japanese Macaques, Macaca fuscata yakui was peculiarized by its all tesselated retina. Creamy colored optic disc, however, was clearly observed.

Macaca fuscata fuscata in western district of Japan Islands showed tigroid retina partially.

In young stage of Anthropoids, retinal surface was observed as vinyl coated and bad high reflex activity for inserted light.

In Anthropoid families, Aotus trivirgatus was unique in fundus figure. This nocturnal species showed brilliant right colored retina having high reflex for inserted light. Macula could not be observed in examined cases of this species.

In Prosimian families, nocturnal animals, Galago crassicaudatus and Nycticebus coucang showed well developed Tapeum lucidum. In the other hand, diurnal species, Demur catta had high reflex tapetal zone in retina. The latter could be thought as a sample of time gap of evolution and adaptation. In this Sub-Order, Tupaia glis, diurnal tree shrew showed exotic ocular fundus. Distribution of the retinal vessels was similar to some species of rodents. However, well developed optic disc of this tree shrew had (pseudo) physiologic cup in central zone. Macula could not be observed in investigated Prosimians.

1. About two hundred White Leghorn female chickens were used to study the ERG, especially oscillatory potentials superimposed on the b-wave.

2. In this study, the stimulus was Xenon flash light of 20 Joule and time constant was 0.003msec. Normally, oscillatory potentials consist of three to six wavelets in ERG of adult chicken.

3. The oscillatory potentials of chick embryo first appeared on the 19th day of incubation.

4. The oscillatory potentials became obscure as the dark adaptation level increased, while they became prominent as the light adaptation level increased.

5. The b-wave of adult chicken ERG could be separated into cone responses (b_p, photopic b-wave) and rod responses (b_s, scotopic b-wave) by the simple procedure.

0日齢，14日齢，3カ月齢，1歳齢，3歳齢，7歳齢，15歳齢，19歳齢の健康なカニクイザル211頭について眼底像を観察し，各齢における像の差を明らかにし得た。各齢の代表的な像をFig. 1～8に示した。すなわち，眼底網膜の色調は0日齢，14日齢では淡紅色，3カ月齢，1歳齢では灰青色から緑青色を呈し，挿入光線反射能も高い傾向を示した。7歳齢以上では褐色に変化し，反射能も次第に低下した。円板の色調は0日齢，14日齢では淡紅色であり，3カ月齢より橙色となった。全例で生理的陥凹はみられなかった。網膜動・静脈血管は，前者が淡紅色，後者が暗紅色を示した。黄斑部は0日齢で判別やや困難であるが，14日齢以後は周囲に比し暗調となり識別容易で，さらに1歳齢からは中心窩も明瞭に観察された。0日齢，14日齢において硝子体動脈の遺残が認められた。