906 



5869. (Slide, Div. 14.) The calcified portions of the crowns of the deciduous teeth, 

 from one side of both jaws, of a Foetus of the ninth month. (Fig. 5. pi. ix. 

 Op. tit.} 



5870. (Slide, Div. 15.) The deciduous mid-incisors, canines and molars, with the 

 calcified summits of the crowns of the permanent second incisors, and first 

 molars, from one side of both jaws, of a Child eight or nine months old. 



These specimens are included in the fig. 6. pi. ix. Op. cit., of the entire series, which are 

 described as " the five temporary teeth in a more advanced state, with the first adult grinder. 

 The adult incisors and one cuspidatus are also begun to be formed : " but, by an error of 

 the press, ' years ' is given for ' months ' in the description of the plate. In the text the 

 specimens are rightly ascribed to an infant of eight or nine months. 



5871. (Slide, Div. 16.) The moieties of longitudinally bisected deciduous and per- 

 manent incisors at four stages of their development, showing " the gradual 

 growth of the body, fangs, and cavity:" the lower row is of the permanent 

 set. (Fig. 2, a, b, c, d, pi. xiii. Op. tit.} 



5872. (Slide, Div. 17.) The moieties of longitudinally bisected deciduous and per- 

 manent molars at three stages of growth. The pulp-cavity is relatively larger 

 in the completed deciduous than in the completed permanent molar. (Fig. 2, 

 e,f,y, pi. xiii. Op. tit.} 



5873. (Slide, Div. 18.) Eight specimens of permanent incisiors at different stages 

 of development. 



These are the subjects of fig. 8. pi. xiii. Op. cit., where they are described as " showing 

 the gradual growth of a single tooth, from its first formation nearly, to its being almost com- 

 plete : " some of the specimens, however, are of the first incisor, some of the upper, some of 

 the lower incisors. 



5874. (Slide, Div. 19.) Six specimens of the first true molar of the lower jaw. 



" They show the formation of the cavity and fangs of the molares of the lower jaw. 

 " (a.) Shows the common cavity in the body of the tooth. 

 " (6.) Shows the cavity still deeper. 



