Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

In the new Orc and Goblin army book it says that goblin warbosses can choose to ride a wolf of a spider and then says a night goblin can choose to ride a giant cave squig. 

In the magic items inventory it says anything referring to goblins means all types and night goblins means just night goblins.  

Am I to assume a Night Goblin can ride all types of the beasts mentioned or just the squig? 

The way I read the rules on p.51, a goblin big boss may ride a wolf, a wolf chariot, or a gigantic spider, but not a great cave squig; while a night goblin big boss may ride a great cave squig, but not a wolf, wolf chariot, or gigantic spider. My reasoning is based on the stats for the GCS: it hates dwarfs, just like night goblins.
Which kind of sucks, since a night goblin big boss on a gigantic spider would make a cool centerpiece for an army.

Each character entry in the army list specifies exactly which mount/s it can take.

The statement in the magic items section about goblins all being goblins as far as the magic items are concerned has no bearing whatsoever on what kind of mount any given goblin can take.