Wow, those are cool! What range, what blister?
Confrontation Mid-nor Dwarf faction I think
2 seperate blisters called Chthonian Larve 1 and 2
Fairly recent releases (About 4 months ago).
Dont have the codes on me.
I'm searching the web for creatures and other similar stuff to represent the Mythos,
EM-4 Miniatures have 1/2 of the Dunwich Detective line in production (Old German Metal Magic COC line of the late 80's)
Reaper have some nice bits, Esp: Frog Demon lord, Eldritch Demon (Cthulhu), Faceless Horror (Shoggoth type), The recent Googlers are basically Deep Ones. There are other items that fit also, not sure of titles, Brain Eater of m-nor (Or some such thing) in the Warlord line.
Heresy: Ghouls
West Wind: Is worth a look for other horror classics.
The above are proberly the easiest items to find, without trawling E-Bay.
WizKids Clik games: Horror Clix have a few Cthulhu's and some Deep Ones, however getting the Cthulhu's is an expensive task.
Upcoming Note:
Mirilton are reported to be retooling the Old Grenadier COC line for release next year.
Alpha Forge: Have hinted at Cthulhu creatures in the upcoming Horror miniature game.