The below four Narlies prototypes were created by Tonka.
At this time there is no confirmation whether these models were rejected concepts for Series 1, Series 2 or possibly an unproduced Series 3.
While the Crayfish's light orange paint is unsealed and easily transferred to other surfaces all appear to be in a completed state and are likely able to be assembled with the addition of the generic, central mechanism.
The Anteater breaks the standard Narlies design having a fixed head and jaw. Due to the end of muzzle hole possibly it may have featured an in / out licking tongue attached to the mechanism that traditionally moved the head. This is purely speculation.
Additional details found on the Narlies Series 1 Page
Anteater Tonka 1986
Crayfish Tonka 1986
Iguana Tonka (good) 1986
Mantis Tonka 1986
Presumably these models would have had the Narlie prefix added resulting in Narliemantis for exampled.
CREDIT: Prototype examples kindly provided by Chris Ingledue.