The Tingler looks like...
Doesn't it look like the sand slug that Kahn finds on Seti Alpha V (or was it VI?) in Star Trek II?
Also I love the psyche-out played in this movie where you think it's Price's character who is scaring the wife to death when it's really the husband. For what it was that was a good twist and some good writing.
Questions are a burden to others. Answers are prison for oneself.