Ganoidei. 
102 
DISTRIBUTION OF ANIMALS. 
[part j. 
Sub-class. 
Order. 
Sj 
Eetnarks. 
Teleostei 
Dipnoi 
Ganoidei 
Ji 
9. 
Chondropte- j 10. 
rygii J 11. 
Cyclostomata 12. 
Leptocardii 1 3. 
.Acantliopterygii 
Do. Pharyncognatlii 
Acanthini 
Fhysostomi ... 
Lophobranehii 
Plectognathi 
Sirenoidei . . 
Holostei 
Chondrostei. 
Holocephala ... 
Plagiostomata 
Marsipobrancliii 
Cirrhostomi ... 
Total 
47 
5 
6 
29 
2 
2 
1 
3 
2 
1 
15 
2 
1 
Gasterosteidee to Notaeanthi. 
Pom acc-n tr id a; to Chromidse. 
Gadopsidee to Pleuronectidse. 
Siluridse to Pegasidse. 
Solenostomida? and Syngnathid®. 
Sclerodermi and Gymnodontes. 
Sirenoidei. 
Amiidfe to Lepidosteidse. 
Aecipenserida? and Polydontidae. 
Chimaerida?. 
Carchariidae to Myliobatidae. 
Petromyzontidae and JMyxinidse. 
Cirrhostomi. 
116 families. 
INSECTS. 
The families and genera of insects are so immensely numerous, 
probably exceeding fifty-fold those of all other land animals, 
that for this canse alone it would be impossible to enter fully 
into their distribution. It is also quite unnecessary, because 
many of the groups are so liable to be transported by accidental 
causes, that they afford no useful information for our subject ; 
while others are so obscure and uninteresting that they have 
been very partially collected and studied, and are for this 
reason equalty ineligible. I have therefore selected a few of 
the largest and most conspicuous families, which have been so 
assiduously collected in every part of the globe, and so carefully 
studied at home, as to afford valuable materials for com- 
parison with the vertebrate groups, when we have made due 
allowance for the dependence of many insects on peculiar forms 
of vegetation, and the facility with which many of them are 
transported either in the egg, larva, or perfect state, by winds, 
currents, and other less known means. 
I confine myself then, almost exclusively, to the sixteen 
families of Diurnal Lepidoptera or butterflies, and to six of the 
most extensive, conspicuous, and popular families of Coleoptera. 
