. The sense of touch in mammals and birds : with special reference to the papillary ridges . Fig. 139.—Mandrill. Papio mormon, x 25. Pes. Plantar surface, fibularborder, in front of heel; slight imbrication of papillary ridges and ofpapillae of corium ; longitudinal section. DESCRIPTION OF SPECIES EXAMINED 119 lary ridges. The apex of the whorl is in the centre and on eitherside of it are well-marked papillary ridges with an imbricationdirected towards the apex. Driisenleisten small, papillse of thecorium pointed. Fig. 136.—Longitudinal section from the plantar surface ofthe hind foot, with ma
. The sense of touch in mammals and birds : with special reference to the papillary ridges . Fig. 139.—Mandrill. Papio mormon, x 25. Pes. Plantar surface, fibularborder, in front of heel; slight imbrication of papillary ridges and ofpapillae of corium ; longitudinal section. DESCRIPTION OF SPECIES EXAMINED 119 lary ridges. The apex of the whorl is in the centre and on eitherside of it are well-marked papillary ridges with an imbricationdirected towards the apex. Driisenleisten small, papillse of thecorium pointed. Fig. 136.—Longitudinal section from the plantar surface ofthe hind foot, with marked papillary ridges imbricated in adistal direction, coiled sweat-ducts passing down from each ofthese to the Driisenleisten which are pointed and not very long,papillae of the corium not well developed. / Fig. 140.—Black Ape. Cynopithecusniger. x 15. Pes, D. 4. Middlephalanx, imbrication distal, longi-tudinal Fig. 141.—Black Ape. Cynopithecusniijer. x 15. Pes, D. 5. Ter-minal phalanx, longitudinal sec-tion. Papio hahouini (Fig. 137).—Transverse section through aninterdigital pad on the palmar surface of the forefoot, showingpapillary ridges with imbrication directed away from the centreof the pad, and Driisenleisten and papillae of the corium not wellmarked. Papio mormon (Fig. 138). —Longitudinal section from theulnar border of the palmar surface of the forefoot, showinglow papillary ridges, and these with a distal imbrication ; blunt,short Driisenleisten, and bifurcated papillae of the corium. Fig. 139.—Longitudinal section from plantar surface onthe fibular side in front of the heel. Papillary ridges, low and 120 THE SENSE OF TOUCH IN ANIMALS ill-defined, with a slight distal imbrication, thick, short Drlisen-leisten, and papillae of the corium somewhat indefinite. Cynopithecus niger (Figs. 140, 141). — Longitudinal sectionsfrom middle and terminal phalanges of D. 4 and D. 5, t
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