"S" is for "Skwirm"

Skwirm

No. Enc.:  1d6 (1d12)
Alignment:  Neutral
Movement:  45' (15')
Armor Class:  8
Hit Dice:  3
Attacks:  1 (bite)
Damage:  1d12 + poison
Save:  L2
Morale:  12
Hoard Class:  II
XP:  110

The hideous skwirms are wooly, caterpillar-like creatures that not only infest dank, dark environs (sewers, gravesites, caves, etc.), but also Ancient textile mills, for they possess rapacious appetites for meat, rotting vegetation, and fabrics.  They reach lengths of 3' long, and relentlessly slither after live prey. 

A skwirm's nasty bite injects potent venom, determined by rolling d00+20 on the Poison Class Table [see p. 50 of the Mutant Future Core Rules]...and their stinging hairs inject Class 4 poison upon contact.

4d4 weeks after hatching, skwirms spin silky cocoons, and emerge in 1d6 days in even more terrible forms....

Mutations:  Dermal Poison Slime, Increased Sense (Vision), Toxic Weapon (Venom)

Skwirmin

No. Enc.:  1d8 (2d8)
Alignment:  Chaotic
Movement:  135' (45')
Armor Class:  5
Hit Dice:  3
Attacks:  4 (2 claws, 2 bites)
Damage:  1d4 / 1d4 / 1d8 + poison / 1d8 + poison
Save:  L3
Morale:  10
Hoard Class:  VI
XP:  155

The abominable, ape-like skwirmin are the adult forms of larval skwirms.  They stand 3' tall, and possess primate-like builds (with the corresponding agility and brachiation capabilities) covered in purplish fur.  Their 4 eyes burn with malevolence...radioactive malevolence.

Skwirmin strike with such speed and savagery that they inflict two claw attacks and two bites per round, allowing for double doses of their toxic saliva (as determined randomly on the Poison Class Table).

Female skwirmin lay slimy clutches of 12d4 eggs, and many an incapacitated adventurer has died ugly by being dragged into a hatchery during breeding season.  It's fortunate that skwirmin are cannibalistic; otherwise, they and their horrid young could overrun the Mutant Future.

Mutations:  Increased Sense (Hearing, Smell, Vision), Optic Emissions (Gamma Eyes), Shriek, Toxic Weapon (Venom)

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Designer's Notes:  I've been sitting on these guys for many, many moons because The Esteemed Sniderman revealed his own Skwirms back in November 2011.  I've been reshuffling the queue so as to not bite his style.