134: SPECIAL EXPRESSIONS: CHAP. V. \ Painful emotions and sensations.—With monkeys 1 the expression of slight pain, or of any painful emotion, | such as grief, vexation, jealousy, £c., is not easily dis- j tiuguished from that of moderate anger; and these states | of mind readily and quickly pass into each other. Grief, j however, with some species is certainly exliibited by , weeping. A woman, who sold a monkey to the Zoological | Society, believed to have come from Borneo (Macaws | maurusor M. iuornatus of Gray), said that it often cried; | and Mr. Bartlett, as well as the keeper Mr. Sutton, have }' repeatedly seen it, when grieved, or even when much • } pitied, weeping so copiously that the tears rolled down. its cheeks. There is, however, something strange about 1 this case, for two specimens subsequently kept in the Gardens, and believed to be the same species, have never * been seen to weep, though they were carefully observed by the keeper and myself when much distressed and loudly screaming. Rengger states 12 that the eyes of the Oebus azarcB fill with tears, but not sufficiently to over- ,, flow, when it is prevented getting some much desired | object, or is much frightened. Humboldt also asserts that the eyes of the Callithrix sciureus " instantly fill • f with tears when it is seized with fear; " but when this •' pretty little monkey in the Zoological Gardens was teased, so as to cry out loudly, this did not occur. I do ** not, however, wish to throw the least doubt on the ac- curacy of Humboldt's statement. The appearance of dejection in young orangs and f chimpanzees, when out of health, is as plain and almost as pathetic as in the case of our children. This state of % mind and body is shown by their listless movements, *' fallen countenances, dull eyes, and changed complexion." . 12 Hengger, ibid. s. 46. Htim'boldt, * Personal Narra- . tive,' Eng. translat. vol. iv. p. 527.