Dear Fiona, Apart from Glastra, Böhme (1977) is good; it's in German but the drawings are very clear. Gottfried Böhme, 1977: Zur Bestimmung quartären Anuren Europas an Hand von Skelettelementen, Wissenschaftliche Zeitschrift der Humboldt-Universität zu Berlin, Mathemathisch-Naturwissenschaftliche Reihe 3, 283-299. Jørn Zeiler ----- Original Message ----- From: fiona beglane To: [log in to unmask] Sent: Thursday, February 05, 2009 5:53 PM Subject: [ZOOARCH] Frogs and toads Hello Zooarchers, Can anyone give me any information or point me at references to distinguish the skeleton of the Natterjack Toad (Bufo calamita) from the Common Frog, (Rana temporaria)? Thank you all in advance Fiona ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.233 / Virus Database: 270.10.18/1936 - Release Date: 02/05/09 11:34:00