Where is "accumulate"?

[Mircea Draghicescu]

When loading the monad library in hugs98 I get:

ERROR "D:\hugs98\hugs98-990222-all\lib\Monad.hs": Unknown entity "accumulate" exported 
from module "Monad"

It seems that in Haskell 98 "accumulate" was replaced by "sequence" and "sequence" by 
"sequence_".
This is not mentioned in the Haskell 98 web page. Where can I find an exhaustive list 
of the
differences between Haskell 1.4 and '98?
Thanks.

Mircea