Slam attacks: How are they calculated

[Akeela Valerian, the Wolf]

For example, small earth elemental has strength 16 and BAB +2.

It's slam attack is: Melee slam +6 (1d6+4)

Wouldn't to hit bonus be STR+BAB (+5) and damage 1d6+3? Are slams given 1 1/2 strength bonus on all creatures like a two handed weapon attack?

Trying to calc stats for some summon monsters with augmented summoning for Gen Con and want to be sure I get it right.

Thanks!

AV

[Zaister]

The small earth elemental gains a +1 to hit because auf its size. Its damage is more that STR bonus due to the following rule:

PRD (Universal Monster Rules) wrote:

If a creature has only one natural attack, it is always made using the creature's full base attack bonus and adds 1-1/2 the creature's Strength bonus on damage rolls.