Lacunal scales are those scales that form the inner border of the loreal pit in crotaline snakes.
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The diameter of eye one-fourth the length of the ocular shield, and the ventrals a little broader, twice as broad as the adjacent scales: ventrals 188-200; caudals 15-17.
Preventral scales are snake scales positioned anterior to the ventral scales and are wider than they are long, but do not come into contact with the paraventral row of dorsal scales on either side of the body.