Proceedings of the general meetings for scientific business of the Zoological Society of London, 1904 vol. 2

Page 303

414 THE HON. WALTER ROTHSCHILD ON [Dec. 13, family-Hylobatidte-and not be united with the great man-like apes. Although I propose to deal mainly with the Chimpanzees, I must allude to the genera Gorilla and Pongo, as I differ slightly from Professor Matschie. In the first place, Professor Matschie himself gives only T a b le of Comparative Measurements of the Skulls of Gorilla gorilla and G. gorilla matschiei. Hinder surface o f Head : Greatest breadth at the Mastoid processes.......................... 144, 147, 155, 162 mm. Breadth above the Mastoid pro­cesses .............................. 116, 120, 121, 123 mm. Length from centre of Crista lambdoidea to basal edge of Foramen magnum.......... 90, 100, 101, 103 mm. Foramen magnum : Length ..................................... 30, 32, 32, 34 mm. Breadth..................................... 26, 28, 29, 30 mm. Breadth on outside of Occipital condyles................................. 45, 45, 51, 51 mm. Basioccipital: Length from front edge of Foramen magnum .............. 45, 45, 46, 49 mm. Occipital condyles : Breadth at base.................. 31, 32, 35, 38, 39 mm. Breadth at anterior edge ...... 23, 24, 29, 30 mm. Vomer: Length ..................................... 18, 19, 19, 23 mm. Breadth..................................... 16, 17, 18, 19 mm. Basisphenoid: Width at Foramen rotundum... 58, 58, 58, 59 mm. Width at apex of Petrous portions of Temporal .......... 32, 33, 35, 35 mm. Pterygoid processes o f Sphenoid : Length ..................................... 64, 65, 68, 69 mm. Breadth, singly.......................... 17, 18, 18, 19 mm. Breadth across ......................... 60, 60, 60, 62 mm. Articular condyle o f Lower Jaw : Width......................................... 32, 34, 36, 36 mm. Coronoid process: Greatest width .......................... 26, 30, 30, 34 mm. Width between Coronoid pro­cess and Articular condyle ... 34, 34, 34, 41 mm. Width from outside of Coronoid process to outside of Articular condyle .................................. 70, 73, 75, 79 mm. Nasals: Length ..................................... 38, 40, 41, 42 mm. Width ..................................... 28, 29, 33, 36 mm. Premaxilla: Length ..................................... 31, 31, 34, 36 mm. Breadth across the canines...... 55, 70, 71, 73 mm. Zygoma: Breadth at molar portion ...... 30, 32, 32, 38 mm. Breadth at narrowest part ...... 16, 16, 17, 17 mm! Length of skull front of Arcus superciliaris to front of Pre-maxilla .............................. 145, 146, 150, 153 mm. 170 mm. 163 mm. 109 mm. 40 mm. 35 mm. 59 mm. 35 mm. 40 mm. 20 mm. 19 mm. 10 mm. 62 mm. 30 mm. 51 mm. 24 mm. 79 mm. 42 mm. 21 mm. 21 mm. 56 mm. 45 mm. 29 mm. 39 mm. 90 mm. 43 mm. 16 mm. 160 mm.