IS93.] 123 
[Hyatt. 
law of growth, 62; anabolism andcatabolinn, 63-64; multiplication ot cells by 
fission essentially ontogenetic, 65; distinct from fissiparity, 65; delinitiou of 
term zoon 65, (note); independent zoons formed by gemmation parts of a 
cycle, 65-66 ; anaplasis, metaplasis, paraplasis, 66 ; growth essentially onto- 
genetic, 66; characterislics of ontogeny due to heredity, to iictjuisition, and to 
rejuvenescence, 67; growth due to the union of two factors, 67. 
Genesiology or Heredity ..... G7-82 
Discussion of term, 67; heredity a secondary and distinct form of growth 
force, 67-68; effect of conjugation in complicating llie problems of genesiol- 
ogy, 68 ; amitosis and mitosis indicate the existence of a cycle iu the life of a 
cell, 69; difficulties of corpuscular theories of transmission, 69-70; Hering, 
Cope, Haeckel, Ribot on the identity of memory and heredity, 70-72 ; memory 
and habit, 72-73; heredity a mode of memory, 73; term mnemogenesis, 73; 
application of this theory, 73; Weismann's assumption of germ plasm and 
somatoplasm unnecessary, 74; Spencer's theory and the mnemonic theory 
consistent, 74-75; law of acceleration due to mechanical replacement of char- 
acters and parts, 76; new term, tachygenesis, proposed, 77; Cope's views, 77; 
Haeckel's views, 78 ; use of terms palingenesis, cenogenesis, and tachygene- 
sis, 78 (note), 78-79; law of tachygenesis not duplex in character, 80; degen- 
eration aud progression both due to tachygenesis, 80-81; specialization bv 
reduction included by Cope under retardation 80, (note); this due to tachygen- 
esis 80, (note); heredity cannot produce or occasion variations, 81 ; union of two 
sexes probably inadequate to occasion pernument variations, 81-82; the onto- 
genetic cycle probably due togcnism, 82; this opposed to Hurst's views, 82; 
genesiology defined, 82. 
Ctetology or the Study of Acquired Characteristics 83-87 
Ciiaracteristicsnot divisible into inheritable and non-inheritable, 83-84; Cope's 
theory of diplogenesis, 84; effort as an agent of modification, 84; tiiis term 
defective, 84; term entergogcnism, proposed, 84; Cope's terms kinelogenesis, 
neurism, and plirenism, 84; the theory of entergogenism accounts for the suit- 
ability of variations, 85; use of term selection misleading, 85; Ryder's terms 
ergogeny aiul statogenesis, 85; common local characters not due to selec- 
tion but to the action of the surroundings and the reactions of tiie organism, 
86; the action of tiie surroundings tiie only known cause of moJifications, 86; 
action of tiie surroundings upon the organism as a rule indirect or through 
entergogenic reactions, 86 ; ctetology, however, includes direct effects of pliysi- 
cal surroundings when these actually take place, 87 ; use of term ectcrgogene- 
sis, 87; ctetology defined, 87. 
Bioplastology ........ 87-92 
Discussion of term, 87-88 ; Haeckel's term law of biogenesis should be called tlie 
law of palingenesis, 88 ; i)asis of bioplastologj', 88 ; repetitions of similar char- 
acteristics or parallelism not confined to tiie earlier stages of growth, 89; 
greatest divergence of forms occurs in adults, 89-90; forms parallel in old age, 
90 ; the more or less exact parallelism of forms in old age attributable to 
genism, 90; this shows one of the marked distinctions of heredity, 90; 
heredity obviously distinct from growth, 90-91 ; use of term morphogeny, 91-92 ; 
ontogeny, phylogeny, and paleontology, as used by Haeckel, 91 ; bioplastology 
and morphogeny, 92; the aims of bioplastology, 92; growth, genism, and 
ctetism the results of different forms of organic energy, and bioplastology the 
result of the action of all three of these in building up cycles, 92. 
