28 



DESCRIPTION OF THE PLATES. 



Teeth detached of a Capuchin Monkey 

 (Cebus capucinus). Fig. 10. Teeth of one 

 side of the upper jaw of a Howler-Mon- 

 key (Mycetes) : i, incisors ; c, canines ; 

 p, premolars ; m, molars. De Blain- 

 ville. 



PLATE 115. 



A longitudinal section of a lower incisor of 

 a Galeopitheus, magnified, m, medullary 

 canal, or continuation of the pulp -cavity 

 into a division of the crown, 1. entire 

 incisor, nat. size ; i, g, the same slightly 

 magnified. Original. 



PLATE 116. 



Fig. 1. — The upper and lower series of 

 teeth of the left side detached of the Cer- 

 copithecus Sabceus. Fig. 2. The teeth of 

 the left side of the lower jaw in situ, of the 

 Macacus radiatus. Fig, 3. m 1, the first, 

 and m 3 the last true molar, left side 

 of the lower jaw of the fossil Monkey 

 of the Eocene tertiary sand in Suffolk, 

 (Macacus eoccenus). Fig. 4. Incisors, 

 canine and first premolar of left side 

 upper jaw, of the Mandrill, (Cynocephalus 

 maimon). Fig. 4\ i, incisors ; c, canine; 

 p, first premolar, of left side, lower jaw 

 of the Mandrill (Cynocephalus Maimon.) 

 Fig. 5. Teeth of left side of upper and 

 lower jaw of a Semnopithecus. Fig. 6. 

 The same of a Gibbon (Hylobates.) 

 Fig. 7. Front view of the crown of the 

 grooved canine of a Spider Monkey 

 (Ateles). Fig. 8. Front view of the 

 grooved canine of a Baboon (Cynocephalus) . 

 De Blainville, (figs. 2 # 3, original.) 



PLATE 117. 



Fig. 1. — Side view of the teeth, left side, 

 upper and lower jaw of the male Great 

 Orang-Utan (Simia Wurmbii). Fig. 2. 



Grinding surface of the upper teeth, left 

 side of the same. Fig. 3. Side view of 

 the upper teeth, left side, of the female 

 Simia Wurmbii. Fig. 4. Side view of 

 the upper and lower teeth, left side, of 

 the male Kasser Orang, (Simia Morio.) 

 Each figure is of the nat. size ; i, incisors; 

 c, canines ; p, premolars ; m, molars. 

 Original. 



PLATE 118. 



Fig. 1 . A side view with the fangs exposed, 

 and a view of the grinding surface, of 

 the teeth of the left side, upper jaw, of 

 the male Chimpanzee (Simia Troglodytes) . 

 Fig. 2. Aboriginal Australian. Fig. 3. 

 Europaean. Original. 



PLATE 119. 



A view of the grinding surface, and a side 

 view with the roots exposed, of the teeth 

 of the left side, lower jaw, of, Fig. 1. 

 male Chimpanzee. Fig. 2. Australian. 

 Fig. 3. European. Original. 



PLATE 119. A. 



Fig. 1 . A portion of a longitudinal section 

 of the crown of an incisor of the Chim- 

 panzee, magnified 450 linear diameters ; e, 

 enamel fibres ; t, dentinal tubes ; d\ denti- 

 nal cells. Fig. 2. A portion of a transverse 

 section of the incisor of a Chimpanzee, 

 near the centre of the crown ; a, arese 

 of dentinal tubes ; b, projDer walls of the 

 tube ; i, intertubular substance, mag- 

 nified 800 linear diameters. Original. 



PLATE 120. 



Fig. 1. — Part of the skull of a young 

 Chimpanzee, showing the deciduous and 

 some of the permanent teeth, of the left 

 side. Fig. 2. Jaws of the left side of an 

 Orang-Utan, giving a similar view of the 



