. The sense of touch in mammals and birds : with special reference to the papillary ridges . halanges, longitudinal, wide ellipses on D. 1, 2, 3,4 ; D. 5 loops open to ulnar side.„ middle phalanges : D. 2, 3, 4, 5, arches open in proximal direction.„ proximal phalanges : D. 1, transverse ; D. 2, very low arches ;D. 3, double arches ; D. 4, arches ; D. 5, arches, open inproximal direction.(6) Palmar surface. Three interdigital eminences, faintly marked ; small thenarand no hypothenar on all interdigital eminences, longitudinal and oblique, exceptat base of D. 3, where there are ar
. The sense of touch in mammals and birds : with special reference to the papillary ridges . halanges, longitudinal, wide ellipses on D. 1, 2, 3,4 ; D. 5 loops open to ulnar side.„ middle phalanges : D. 2, 3, 4, 5, arches open in proximal direction.„ proximal phalanges : D. 1, transverse ; D. 2, very low arches ;D. 3, double arches ; D. 4, arches ; D. 5, arches, open inproximal direction.(6) Palmar surface. Three interdigital eminences, faintly marked ; small thenarand no hypothenar on all interdigital eminences, longitudinal and oblique, exceptat base of D. 3, where there are arches open in proximaldirection ; and at base of D. 3 a few irregular ellipses.„ thenar eminence, oblique and longitudinal.„ hypothenar eminence absent.„ remaining portions of surface longitudinal. 54 THE SENSE OF TOUCH IN ANIMALS Foot. (Fig. 43.) Digits long, D. 1 much developed ; wide pulps ; nailsshort; plantar portion well developed,(a) Digits. terminal phalanges, longitudinal, wide ellipses.„ middle phalanges, transverse and very low arches open inproximal Fig. 42.—Hainan Gibbon. Hyldbatcs Fig. 43.—Hainan Gibbon. Hylohateshainanus. Manus, right. Draw- hainamt^. Pes, left. Drawing ing from impressions. from impressions. proximal phalanges : D. 1 transverse ; D. 2, 3, 4, 5, archesopen in proximal direction.(b) Plantar surface. All the eminences ill-defined ; low rounded eminence at base of D. rounded eminence at base of D. central interdigital eminence. DESCRIPTIONS OF THE PAPILLARY RIDGES 55 Eminence at base of D. 1, prominent and on fibular border eminence at base of D. 2, narrow loops open to fibular side ;eminence at base of D. 5, in radiating lines from centre ofeminence; eminence at base of D. 1, transverse at distal por-tion, mde arches at proximal portion open in distal direction.„ eminence on tibial border of heel, wide loops opening on tibial side.„ eminence on fibular border of heel,
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