Does anyone know what the ventral scales of snakes are attached to?

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The Animals
0.1 Royal Python - Chilli
2.0 Grey Rat Snakes - Mouse and Gannet
0.1 Amel Corn - Selene
5.1 Dogs - Hogan, Gadget, Gizmo, Cookie, Dotty, Jake
0.3 Cats - Millie, Bramble, Tigger
1.3.2 Finches - Unnamed
1.0 Canary - Also unnamed
1.0 Rabbit - Smokey Joe

In short, they're attached to muscles which are attached to the ribs.

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I spent a lot of money on booze, birds and fast cars.
The rest I just squandered.
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The MenagerieSnakes0.0.1 - Boiga cyanea0.0.1 - Boiga dendrophila
2.2.0 - Opheodrys aestivus1.1.0 - Chrysopelea ornata1.1.0 - Ahaetulla prasinaLizards1.0.0 - Iguana iguana
1.1.0 - Phelsuma quadriocellataAmphibians
2.4.0 - Dendrobates auratus2.2.0 - Litoria caerulea1.1.0 - Agalychnis callidryasParrots
0.1.0 - Psittacus erithacus0.1.0 - Amazona autumnalis
1.1.0 - Agapornis personata