JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE XII, 
Illustrating Mr. Rainey’s paper on the Formation of Dental 
Tissues. 
Fig. 
' 1.—a. Portion of silicious cuticle from sugar-cane, as seen from above. 
é. The same, from below. 
ce. Vertical section. 
2.—Undulated margin of entirely uncalcified dentine-matrix, fom the 
specimen given in outline at fig. 4. 
3.—Dentine in different stages of development; from fetal calf. The 
lines in the engraving necessary to indicate the spaces between the 
dentine fibres and globules, do not exist in the specimen from which 
the drawing was taken. 
4.—Tooth from foetal calf in very early stage, gently removed from the 
subjacent pulp; ¢, tooth; p, dental pulp. 
5.—Globular dentine; from human tooth. 
6.—Horizontal section of dentine; from human tooth decalcified. 
7.—Enamel in different stages of development; from foetal calf. 
8.—Matrix dividing into two layers; m, matrix before dividing; e, m, 
enamel matrix, with particles of enamel; d, m, dentine matrix. 
