Cephalochordata
You'll find images, descriptions, and specimens of lanclets at this site form Animal Diversity Web.
Intended Audience: General Reading Level: High School Teacher Section: Yes Searchable: Yes
Introduction to the Cephalochordata
You can learn more about lancelets at this site from the University of California Museum of Paleontology.
Intended Audience: General Reading Level: High School Teacher Section: No Searchable: No
Video