Lobster Cocktail

I had assumed Lobster Cocktail was like shrimp cocktail - shellfish and cocktail sauce in a glass. However, while the cocktail sauce may be included and it is served In a glass, the dish itself is more of a seafood salad with lobster meat, avocado, lettuce and sometimes brown bread with some kind of sauce.
In Wish With The Candles Professor Justin Teylingen takes the Hastings women to an inn at Cerne Abbas where they have lobster cocktail, Coq au Vin and "a fresh fruit salad laced with Curaçao and veiled in whipped cream."