Cross-Section of a Little Skate Vertebra (image) Marine Biological Laboratory Share Print E-Mail Caption Cross-section of a little skate (Leucoraja erinacea) vertebra showing the spinal cord, blood vessels, and vertebral cartilage. Credit Katharine Criswell Usage Restrictions Please use with proper credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.