188 NOTICES OF THE MEETINGS [April 30, 
single life: in other words, it is, all those animal forms which pro- 
ceed from a single egg, taken together. 
The individual is represented in very various modes in the Animal 
Kingdom : these modes pass insensibly one into the other, in nature ; 
but for purposes of clear comprehension they may be thus distin- 
guished and tabulated. 
Representation of the Individual. 
I. By Successive Inseparable Forms. 
Ascaris. A. Forms little different = Growth. 
Triton. B. Forms markedly different = Metamorphosis. 
II. By Successive Separable Forms. 
1. Earlier Forms not Independent. 
Cockroach. A. Forms little different = Growth with Ecdysis. 
Beetle. B. Forms markedly different = Growth with Meta- 
morphosis. 
2. Earlier Forms partially Independent. 
Starfish. 
III. By Successive and Co-existent Separable Forms. 
a. External Gemmation. 6. Internal Gemmation. 
A. Forms little different. All the forms produce eggs. 
Nais. 
asi } Gyrodactylus. 
B. Forms markedly different. Last forms only produce eggs. 
*,* Last Forms produced. 
Generally : 
Medusa. } Fluke. 
Locally : 
Salpa. } Aphis. 
These various modes of Representation of the Individual are ulti- 
mate facts.: One is neither more nor less wonderful or explicable 
than another; any theory which pretends to account for the Suc- 
cessive and Co-existent forms of the Aphis-individual, must also 
account for the Successive forms of the Beetle-individual or of 
the Horse-individual — since they are phenomena of essentially the 
same nature, 
