Dragons, Dogs & Amadillos?

[asteckley]

Conclusion: While the presence of the nebuly line is integral to the interpretation of the illustration, the failure to recognize its existence and the inability to use the correct terminology throw open the doors to misguided explanations.

Assuming it is a "nebuly line" can throw open the doors to misguided explanations as well.  As drawn, it appears far more likely to be a pillow.