hyde is the antithesis of jekyll decribede as 'dwarfish, and has a 'displeasing simle'
hyde is decribed as 'troglodaytic'
means he is a caveman, victorians belived that our ancestors behaved like apes and had no sexual inhibitions, zoomorphism may also decribes hyde as highly sexual as that was the term for the word at the time.
a religous interpretaion of hyde may be that hyde represents the devil and innate evil in mankind whi thrives when god is ignored or deliberatly disobeyed seen through hyde going against gods will and attempting to create new life- through the separation of jekyll from hyde
'hardly human... something trogadlytic'
'clubbed him into the earth with ape like fury'
'satans signiture upon his face'
'snarled aloud into a savage laugh'
described as a 'masked thing' in chapter 8
'the brute that slept'
my devil has been long caged he came out roaring chap 10