What are the ironic elements in the story "The Black Cat"? Edgar Allan Poe's "The Black Cat"

The link below is an excellent, detailed discussion of
irony in this Poe short story, and I recommend you read it for a thorough examination of
this topic.  I'll simply highlight a few of the more obvious ironic
elements.

First, the narrator's tone, as it is in so many
of Poe's writings, is ironic.  He's about to recount a horrific tale about his murdering
his cat and his wife--yet he does so almost without care.  "It's not that big of a deal,
though some have made it a big deal" seems to be his tone.  He treats the discussion of
cruelty and murder as if he were retelling a memory from childhood which others might
remember a different way. Just a misunderstanding, of
sorts.

Second, it is ironic that he kills the cat he loves,
and the cat he feels antagonism toward (Pluto) is the one which seals his
fate.

Third, Pluto began as a cat who once loved his
master, yet he was vilely mistreated.  Once he loses an eye, he begins to "see" the
narrator in a more accurate light.

Finally, the narrator is
incredulous that a guy like him could ever become the man he's accused of
being.

"From
my infancy I was noted for the docility and humanity of my disposition. My tenderness of
heart was even so conspicuous as to make me the jest of my
companions."

As the events
unfold, we find him to be anything but docile, humane, tender, or compassionate to man
or beast.

Irony is a contrast between two things: what is
said and what is meant (verbal irony); what is expected and what happens (irony of
situation); and what the audience/readers know and what the characters know or believe
(dramatic irony).   Poe is the master of all three and he uses them masterfully in this
story.