Plate 2 from Kellogg, 1923: Type skull of Squalodon calvertensis. Ventral view. Legend: Bo. pl., descending free plate of basioccipital; Bs., basisphenoid; C., condyle; Can. op., canalis opticus; Fo. c., condylar foramen; Fo. lac. med. foramen lacerum medium; Fo. lac. post., foramen lacerum posterius; Fr., frontal; Fs. pert., fossa petrosi; Gl. f., glenoid fossa; La., lachrymal; M1-M7, first to seventh molars, inclusive; Max., maxilla; Mead. aud. ext., meatus auditorius externus; Pa. p., paroccipital process; Pm3-Pm5, third to fifth premolars, inclusive; Pmx., premaxilla; Po. gl. p., postglenoid process; Po. p., postorbital portion of supraorbital process of frontal; Pr. falc., processus falciformis; Pr. p., preorbital portion of supraorbital process of frontal; Prs., the posterior end ofthe presphenoid is exposed in this open suture in front of the basisphenoid; Pt., external pterygoid; Sq., squamosal; Vo., vomer; X., internal openings of nasal passages were present at this point originally, but were not preserved in this skull - the region they would occupy having been filled with plaster of Paris.
Measurements
Total length of skull as preserved: 750mmLength of rostrum as preserved (maxillary notch to tip of beak) 485mm