I. QI 17, fig. on p. 51 (photo available at http://www.britishmuseum.org/research/collection_online/collection_object_details/collection_image_gallery.aspx?assetId=383014001&objectId=144875&partId=1; drawing available at http://www.britishmuseum.org/research/collection_online/collection_object_details/collection_image_gallery.aspx?partid=1&assetid=806303001&objectid=144875)