When citing the eHistology Atlas Supplment, please use the following text: eHistology Atlas Supplement with annotations (http://www.emouseatlas.org/emap/eHistology_supplement/) and refer to this publication: Elizabeth Graham, Julie Moss, Nick Burton, Chris Armit, Lorna Richardson and Richard Baldock (2015) The atlas of mouse development eHistology resource, Development 142:1909-1911. doi: 10.1242/dev.124917 When acknowledging the use of images, please also refer to the plate and the image (e.g. Plate S3, Image e)."