One more to post to see if someone more knowledgeable than me can verify. These were collected from Spence Gulch. I think that the first and second ones are Amacephalus idahoense. First is about 1-1/4" long and second is about 3/4" long. The third trilobite is very small at about 1/4" long bit looks to me like Zacanthoides idahoensis (I sure wish that one was full grown). Preservation on these is not the best, but you take what you get and these are my first Spence Shale fossils.