terricolous, adj.
Zool. Of an animal: living on the ground or (esp.) in the earth or soil. E.g., earthworm.



The piscine and the terricolous
Keep an etiquette metticolous.
The one confines his bowel motions
To otions,
The other doesn't practise incontinence
Off continence.



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More beasts:

merlion, octothorp,  discalceate, 

oology, xoloitzcuintli, biga,

alectryomancy, neddy, adhocracy,

philotherian