diff --git a/src/sequence.ml b/src/sequence.ml
index 96d2452..b5ce58d 100644
--- a/src/sequence.ml
+++ b/src/sequence.ml
@@ -133,9 +133,7 @@ let concat s k = s (fun s' -> s' k)
 
 let flatten s = concat s
 
-let flatMap f seq k = seq (fun x -> f x k)
-
-let flat_map = flatMap
+let flat_map f seq k = seq (fun x -> f x k)
 
 (*$R
   (1 -- 1000)
@@ -147,14 +145,12 @@ let flat_map = flatMap
 let flat_map_l f seq k =
   seq (fun x -> List.iter k (f x))
 
-let fmap f seq k =
+let filter_map f seq k =
   seq (fun x -> match f x with
       | None -> ()
       | Some y -> k y
     )
 
-let filter_map = fmap
-
 let intersperse elem seq k =
   let first = ref true in
   seq (fun x -> (if !first then first := false else k elem); k x)
@@ -337,8 +333,6 @@ let group_succ_by ?(eq=fun x y -> x = y) seq k =
   (* last list *)
   if !cur <> [] then k !cur
 
-let group = group_succ_by
-
 (*$R
   [1;2;3;3;2;2;3;4]
     |> of_list |> group_succ_by ?eq:None |> to_list
diff --git a/src/sequence.mli b/src/sequence.mli
index 9a501ce..379a158 100644
--- a/src/sequence.mli
+++ b/src/sequence.mli
@@ -150,23 +150,19 @@ val concat : 'a t t -> 'a t
 val flatten : 'a t t -> 'a t
 (** Alias for {!concat} *)
 
-val flatMap : ('a -> 'b t) -> 'a t -> 'b t
-(** @deprecated use {!flat_map} since 0.6 *)
-
 val flat_map : ('a -> 'b t) -> 'a t -> 'b t
 (** Monadic bind. Intuitively, it applies the function to every
     element of the initial sequence, and calls {!concat}.
+    Formerly [flatMap]
     @since 0.5 *)
 
 val flat_map_l : ('a -> 'b list) -> 'a t -> 'b t
 (** Convenience function combining {!flat_map} and {!of_list}
     @since NEXT_RELEASE *)
 
-val fmap : ('a -> 'b option) -> 'a t -> 'b t
-(** @deprecated use {!filter_map} since 0.6 *)
-
 val filter_map : ('a -> 'b option) -> 'a t -> 'b t
 (** Map and only keep non-[None] elements
+    Formerly [fmap]
     @since 0.5 *)
 
 val intersperse : 'a -> 'a t -> 'a t
@@ -201,13 +197,9 @@ val sort : ?cmp:('a -> 'a -> int) -> 'a t -> 'a t
 val sort_uniq : ?cmp:('a -> 'a -> int) -> 'a t -> 'a t
 (** Sort the sequence and remove duplicates. Eager, same as [sort] *)
 
-val group : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
-(** Group equal consecutive elements.
-    @deprecated since 0.6 use {!group_succ_by} *)
-
 val group_succ_by : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
 (** Group equal consecutive elements.
-    Synonym to {!group}.
+    Formerly synonym to [group].
     @since 0.6 *)
 
 val group_by : ?hash:('a -> int) -> ?eq:('a -> 'a -> bool) ->
diff --git a/src/sequenceLabels.mli b/src/sequenceLabels.mli
index 5db0707..1a092eb 100644
--- a/src/sequenceLabels.mli
+++ b/src/sequenceLabels.mli
@@ -126,14 +126,12 @@ val concat : 'a t t -> 'a t
 val flatten : 'a t t -> 'a t
 (** Alias for {!concat} *)
 
-val flatMap : f:('a -> 'b t) -> 'a t -> 'b t
-(** @deprecated use {!flat_map} *)
-
 val flat_map : f:('a -> 'b t) -> 'a t -> 'b t
 (** Alias to {!flatMap} with a more explicit name *)
 
-val fmap : f:('a -> 'b option) -> 'a t -> 'b t
-(** @deprecated use {!filter_map} *)
+val flat_map_l : f:('a -> 'b list) -> 'a t -> 'b t
+(** Convenience function combining {!flat_map} and {!of_list}
+    @since NEXT_RELEASE *)
 
 val filter_map : f:('a -> 'b option) -> 'a t -> 'b t
 (** Alias to {!fmap} with a more explicit name *)
@@ -170,8 +168,16 @@ val sort : ?cmp:('a -> 'a -> int) -> 'a t -> 'a t
 val sort_uniq : ?cmp:('a -> 'a -> int) -> 'a t -> 'a t
 (** Sort the sequence and remove duplicates. Eager, same as [sort] *)
 
-val group : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
-(** Group equal consecutive elements. *)
+val group_succ_by : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
+(** Group equal consecutive elements.
+    Formerly synonym to [group].
+    @since 0.6 *)
+
+val group_by : ?hash:('a -> int) -> ?eq:('a -> 'a -> bool) ->
+  'a t -> 'a list t
+(** Group equal elements, disregarding their order of appearance.
+    The result sequence is traversable as many times as required.
+    @since 0.6 *)
 
 val uniq : ?eq:('a -> 'a -> bool) -> 'a t -> 'a t
 (** Remove consecutive duplicate elements. Basically this is
@@ -369,6 +375,13 @@ val int_range_dec : start:int -> stop:int -> int t
 (** Iterator on decreasing integers in [stop...start] by steps -1.
     See {!(--^)} for an infix version *)
 
+val int_range_by : step:int -> start:int -> stop:int -> int t
+(** [int_range_by ~step ~start:i ~stop:j] is the range starting at [i], including [j],
+    where the difference between successive elements is [step].
+    use a negative [step] for a decreasing sequence.
+    @since NEXT_RELEASE
+    @raise Invalid_argument if [step=0] *)
+
 val of_set : (module Set.S with type elt = 'a and type t = 'b) -> 'b -> 'a t
 (** Convert the given set to a sequence. The set module must be provided. *)