AND MESOZOIC FISHES. 
439 
B 
Fig. 4. Spermatodus jjustidosus Cope; A, B nat. size ; a-dx 4. A from above; 3 from 
below ; a supposed palatine teeth ; b pustules on the frontal bones ; c do on the nuixillarv ; 
d paraspheuoid teeth. 3/a;, maxillary; ih;;, hyomaudibular ; parietal; /ffl, basiweiiiilal; 
J^s, parasphenoid ; Bid, basihyal ; CH, ceratohyal ; J, 11, III, eeratobranchials. 
