[16] Weismann, Essays, pp. 85 and 171.

[17] See articles by Whitman and Wilson, Journal of Morphology, vol. viii., pp. 649, 607, etc.

[18] Weismann, Essays, p. 88.

[19] American Naturalist, vols. xxv. and xxvi.

[TABLE OF CONTENTS]

Condensed Chart of Development of the Main Line of the Animal Kingdom leading to Man.

Phylogenetic
Series. 		New Attainments. Organs
Approaching
Culmination. 		Most
Rapidly
Advancing
Organs. 		Dominant
Function. 		Dominant
Mental
(Or Nervous)
Action. 		Sequence Of
Perceptions. 		Sequence Of
Motives. 		Environment
Makes For.
Amoeba. Cell. Touch. Smell. Hunger.
Volvox. Somatic and reproductive cells. Reproductive. Reproduction. Touch. Smell. Hunger. Rapid reproduction and good digestion.
Hydra. Simple reproductive organs. Gastro vascular cavity. (Tissues). Reproductive. Reproduction. Reflex. Touch. Smell. Hunger.
Turbellaria. D
e
v
e
l
o
p. 		Complex reproductive Organs. Supra-oes. Ganglion and cords. Sense organs. Body Wall. Reproductive. Digestive. Reproduction. Reflex. Touch. Smell. Hunger.
Annelid. O
r
g
a
n
s 		Perivisceral Cavity. Intestine. Circulatory system. Nephridia. Visual eyes. Digestion Muscular. Reflex. Touch. Smell. Hunger.
Primitive Vertebrate. Notochord. Fins. Digestion Muscular. Instinct. ?
Fish. Backbone (incomplete). Paired Fins. Jaws from Branchial Arches. Simple heart. Air Bladder. Brain. Digestive. Muscles. Digestion Muscular. Instinct. Hearing. Sight. Strength and activity.
Amphibian. Legs. Lungs. Cerebrum increases from this form on. Muscles. Digestion Muscular. Instinct. Hearing. Sight. Fear and other prudential considerations.
Reptile. Double heart. Muscles and appendages. Muscular. Instinct. ? Hearing. Sight.
Lower Placental Mammals. Constant high temperature. Placenta. Muscle. Muscles and appendages. Muscular. Instinct ? ? Hearing. Sight.
Ape. Erect posture. Hand. Large cerebrum. Brain. Muscular. Nervous. Intelligence. Mental perception. Understanding. Association. " " ? (Shrewdness?)
Man. Very large cerebrum. Personality. Brain. Mind.* Intelligence. Reason.* Love of man. Truth. Right.* Shrewdness. Righteousness and unselfishness.*

* Apparently capable of indefinite development.