Claim CB704: Human embryos do not have gill slits
Brief response in the Index to Creationist Claims in the TalkOrigins Archive.
“Gill slits” by any other name…
Post by Troy Britain on his Playing Chess with Pigeons blog. Note that the tone of this blog can be disrespectful, but this post is not bad and does a good job of explaining the issue.
Wells and Haeckel's Embryos: A Review of Chapter 5 of Icons of Evolution
Article by developmental biologist P. Z. Myers in the TalkOrigins Archive. Please scroll down to the section 'What's wrong with "gill slits"?' for the part relevant to this topic.