1. Dorsum of skull of Diceratosaurus punctolineatus (Cope), from the Coal Measures of Linton, 



Ohio. Original in the Museum at Berlin University. X 2. After Jaekel. />o=postorbital; 

 /V=frontal; ^o/=postfrontal; ;'=jugal; /a=laerimal; jr=maxilla; /5="perisquamosal;" 

 ^=post-parietal; />.r=premaxilla. 



2. Ventral surface of the skull of Diceratosaurus punctolinealus (Cope), from the Coal Measures of 



Linton, Ohio. X 2. After Jaekel. a=anterior palatine vacuity; wrrexoccipital; >=jugal; 

 /^-=maxilla;/r=transverse;/ia/=palatine;^=pterygoid:^r=prevomer;/>i="perisquamosal;" 

 ^z>=posterior or suborbital palatine vacuity; /^=parasphenoid. 



3. Pectoral girdle of Diceratosaurus piinftolineatus (Cope), from the Coal Measures of Linton, Ohio. 



Original in the paleontological Museum at Berlin. X 2. After Jaekel. r/i=inner side of 

 clavicle; j'c=interclavicle; r/=clavicle (,l wer side); rte=cleithrum. 



4. (e) Cervical or anterior dorsal vertebra of Diteratosaurus punctolineatus (Cope), from the Linton. 



Ohio, Coal Measures, fv caudal vertebra shown with its cap of dermal bone; (/r' 

 vertebra \\-ith ribs; .r=dermal plate on neural spine: ^=humer\is; //ulna; r=radius. 



