There are a number of interpretations as to why Golding chose to describe the island as being boat shaped. It could symbolise that the boys on board the island are on a journey from schoolboys to proto-adults, or it might symbolise their journey from civilization to savagery. The irony is that they are actually going nowhere and are reliant on the arrival of a real boat to come and take them away, from the island and from the evil within themselves which threatens their very existennce..
The irony of the island being boat-shaped in "Lord of the Flies" is that while the boys are stranded on an island that resembles a boat, they struggle to build an actual boat to escape. This juxtaposition highlights their inability to take advantage of their surroundings and their descent into savagery that ultimately prevents their rescue.
Ralph is described as being tall and attractive with broad shoulders. Piggy is described as being very fat and wears a greasy wind breaker. Jack is described as being tall and bony, with a freckled face which is ugly, without silliness
Having Simon beaten to death after being mistakenly identified as the beast was a moment of pure irony in Lord of the Flies.
Its is a microcosm of what is happening on the island
An example of figurative language for irony is "It's raining on my wedding day." This line from Alanis Morissette's song "Ironic" is ironic because typically weddings are associated with happiness and good luck, but rain is seen as a symbol of bad luck.
dramatic irony
Irony is used in choices so that a reader can understand the reasons of people being sarcastic.
Goes from religious to being a merchant
The type of irony in "The Lie" by Kurt Vonnegut is situational irony. This is because the main character's lie about being sick to avoid a meeting ends up having unintended consequences that lead to the truth being revealed.
Jack has not been to the part of the island where Simon's secluded clearing is located in "Lord of the Flies."
the girls are lying about being bewitched.
I'm not sure this is the one you're looking for, but soon after the chapter starts (it's on the first page of the chapter in my book) we see an example of verbal irony: Jack broke in. "All the same you need an army--for hunting. Hunting pigs--" Armies aren't used for hunting (protecting from hunger, an internal threat), but for fighting other groups of people (protecting from war, an external threat). Thus, this is an example of verbal irony.
The three tallest boys on the island in "Lord of the Flies" were Ralph, Jack, and Piggy. Ralph was described as the tallest among the boys.