DAVENPORT: PROCESSES CONCERNED IN ONTOGENY. 197 
III°. Processes affecting two or more layers. 
8. Conerescence, p. 191. 
a. of free edges. 
b. of surfaces. 
c. of edges of folds. 
9, Perforation, p. 192. 
IV. Processes occurring in protoplasmic masses. 
IV*. Effecting especially change of volume, 
1. Excessive growth of particular parts, p. 192. 
b. general. 
c. local. 
IV®, Effecting especially change of form. 
2. Rearrangement of nuclei, p. 193. 
3. Vacuolization, p. 194. 
4. Dispersion of elements, p. 194. 
IV*. Effecting especially change in number. 
5. Constriction, p. 194. 
6. Splitting, p. 195. 
7. Fusion, p. 195. 
Tho processes here ennumerated may be for the most part grouped 
under three general heads: — 
I. Taxie processes. 
II. Tropic processes. 
III. General growth processes. 
Under Zaxic Processes I include such as are accompanied by free 
migration of protoplasmic bodies, or by the flowing of protoplasm from 
one part of the whole body to another part. 
Under Zropie Processes I include such differential growth processes 
as result in a turning of protoplasmie bodies (threads or folds) towards 
one another or towards another protoplasmic body. 
By General Growth Processes Y mean those differential growth pro- 
cesses Which are not included under tropic processes. 
To the eategory *'taxie processes" may be provisionally assigned 
Nos. I. 1, 2, 3, 4, 5, and 6; III. 4 (in part) and 5 (in part), 7 (0,9; 
IV. 2, 4, 5, 6, 7. 
To the category “tropic processes ' 
43-1158, 9 
To the category “general growth processes " may be assigned Nos. III. 
1, 2, 3, 4 (in part) and 5 (in part), 6; IV. land 3. 
' may be assigned Nos. II. 1, 2, 3, 
