1904.] ON THE HAND OF THE CHIMPANZEK. 268 



'02 («). Benham, W. B. " On the Old and some New Species of 



Plagiochceta,^^ in Trans. N.Z. Inst. xxxv. p. 284. 

 '02 (&). "The Geographical Distribution of Earthworms. 



etc.," in Report A. A. A. S. Hobart, ix. p. 319. 

 '02 (c). " iNote on a neglected Tasmanian Earthworm," 



in loc. cit. p. 383. 

 Bourne, A. G. " On certain Points in the Anatomy and Deve- 

 lopment of some Earthworms," in Quart. Journ. Micr. 



Sci. xxxvi, p. 25. 

 FletcheRjW, " Notes on Australian Earthworms," in Proc. Linn . 



Soc. N.S.W. (ser. 2) 1886, vol. i. 

 HuTTON, F. W, " Catalogue of the Worms of New Zealand," 



in Trans. N.Z. Inst. xi. p. 317, note. 

 M'CoT, F. ' Prodromus Zool. Yictorife.' Decade I. 1878. 

 Michaelsen, "W. " Oligoclipeta," in Das Tierreich. 1900. 

 Spencer, W. B. " On the Anatomy of Megascolides cmstralis," 



in Trans. Roy. Soc. Victoria, i. 1888, p. 3. 

 -= " Description of Australian and Tasmanian Earthworms," 



in Proc. Roy. Soc. Victoria, 1892, 1895, 1900. 

 Sweet, G. " On the Structure of the Spermiducal Glands, 



etc.," in Journ, Linn. Soc. (London), Zool. xxviii. 1900, 



p. 109. 

 Vejdovsky, Fe. " Zur Entwickl. des nephrid. Apparates v. 



Megascolides australis" in Arch. f. mikr. Anat. xl. p. 552. 



November 29, 1904. 

 G. A. Boulenger, Esq., F.R.S., Vice-President, in the Chau'. 



Dr, Walter Kidd, F.Z.S., exhibited a di-awing of the extensor 

 surface of the hand of a Chimpanzee and made the following- 

 remarks : — 



In the course of an examination of the papillary ridges in 

 some specimens of Anthropoid Apes and Monkeys certain groups 

 of ridges were found on the extensor surface of the terminal 

 phalanges of the hand, apparently identical with those of the 

 palmar and plantar surfaces. Three specimens of Chimpanzee 

 living in the Society's Menagerie were examined, of the ages 

 1 year 8 months, 2| years, and 6 years. In the oldest of these, 

 " Mickie," the ridges were definite and well-developed on the 2nd, 

 3rd, and 4th digits on both hands ; in the youngest specimen, 

 " Jack," they were absent ; and in " Jimmie," 2| years old, they 

 were small and ill-defined, as if in the process of development. 



Direction of Ridges. 



Mickie. Ridges longitudinal and reaching to the matrix of the 

 nail on the 2nd, 3rd, and 4th digits. 



