The nymphs are possibly inspired from Dante manuscripts

[MarcoP]

even on pages where poses should be consistent and the artist clearly spent more effort, there are big differences in how successfully human anatomy and proportions are represented. 

This is just the first area I happened to zoom in on to find an example. Ask: where are the elbows? How long is each part of the arm? Does the arm come from the shoulder or the belly? The answers are different every time.

I will add that hands are a detail that notoriously requires some skill to be drawn accurately.
Opicinus details from You are not allowed to view links. Register or Login to view..