How many Snakes?

[suzoo]

2.1 Thamnophis sirtalis infernalis - California red-sided garter snake
4.3 Thamnophis sirtalis sirtalis - Eastern garter snake
1.2 Thamnophis marcianus - Chequered garter snake - albino
1.1 Heterodon platirhinos - Eastern Hog-nosed Snake (Yellow Phase)
1.1 Pantherophis guttatus - Corn Snakes (Male is Green-splotched snow - Female is Anery Motley)
So, 13 garters.

Tori

Hi Tori,
Please forgive my ignorance, but what is the numbers? How can you have 1.2 snakes?