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Show 1 9 0 6 .] ON ANTHROPOID APES. 4 6 5 1. Further Notes on Anthropoid Apes. By the Hon. W alter R o t h s c h i l d , Ph.D., F.Z .S. [Received May 1, 1906.] Since my former paper (P. Z. S. 1904, vol. ii. pp. 413-440) was read, I have obtained a considerable amount of fresh material including skins, skeletons, and skulls of Gorilla, Simla, and Pongo. I propose, however, here to deal only with a few facts, corrections, and additions in connection with the genera Gorilla and Simla. I have received several fresh skulls of Gorilla gorilla matschiei from the Camaroons collected by Mr. Bates, and they fully confirm both the distinctness of this geographical race and my diagnostic characters. A point in connection with these Gorillas I omitted to mention in my original article is that both Gorilla gorilla from Gaboon and Gorilla gorilla matschiei from S. Camaroons have individuals with red heads and others with dark heads with no red. In the case of the typical Gaboon Gorilla gorilla the redheaded individuals outnumber the dark ones by 4 to 1, but of the S. Camaroons race, although we have a large number of skulls, the skins are too few to enable me to gauge the proportion. In Goi'illa gorilla the dark-headed specimens have the head of a brownish-olive colour, while in G. g. matschiei the dark-lieaded individuals have a rufous-brown head. A striking difference between red-headed specimens of G. goi'illa and G. g. matschiei is that in the former the red colour is sharply defined, while in the latter the brown forehead passes gradually into a deep rufous red on the crown and occiput. In a former collection Mr. Bates sent a skull of Professor Matschie's G. gorilla cliehli and in his last collection is a not very perfect skin of this race of Gorilla. As Prof. Matschie described the race from skulls only, this specimen completes the diagnosis. G o r il l a g o r il l a d ie h l i Matschie. Differs from the dark-lieaded specimens of other races in having the head almost entirely black, only the forehead having a few brown hairs. Black colour of arms and shoulders very intense. Back, belly, legs, and chest ashy grey, but darker than in G. gorilla and G. g. matschiei. Beard on chin much longer than in G. g. matschiei, thus proving that G. beringeri of Kirunga is only a local race of G. gorilla and not a distinct species ; the latter must stand as Gorilla gorilla beringeri Matschie. Beard on sides of face black, instead of yellowish grey as in G. g. matschiei or ashy grey as in G. gorilla. Professor Matschie has recently described (Sitzungsb. natur-forscli. Fr. Berl. Nr. 10, pp. 279-283, 1905), under the name of Gorilla jacobi, another race of Gorilla gorilla. The type came from the station at the mouth of the Lobo River, near the influx of the River Djong, in the Dscha river-system, West Central Camaroons. The characters given depend on the immensely broad bones of the 32* |