PLATE V. 



COMPARATIVE VIEWS OF SUPRAORBITAL HORN CORES. 



(See p. 32.) 

 Plate prepared under the direction of Lull. 



Fig. 1. Monoclonms crasms. No. 3997, American Museum of Natural History. 



Fig. 2. Type of Ceratops montanus Marsh. No. 2411, U. S. National Museum, oblique back view. 



Fig. 3. Type of Ceratops (Monodonius) canadensis Lambe. No. 1254, Canadian Geological Survey. Modi- 

 lie 1 from Lambe. 



Fig. 4. Type of Ceratops (Monoclonius) recurvicornis Cope. No. 3999, American Museum of Natural History. 

 Modified from Cope. 



Fig. 5. Type of Triceratops prorsus Marsh. No. 1822, Yale Museum. After Marsh. 



Fig. 6. Triceratops prorsus? Marsh. No. 2100, U. S. National Museum. 



Fig. 7. Type of Triceratops brevicornus Hatcher. No. 1834, Yale Museum. 



Fig. 8. Type of Triceratops calicornis Marsh. No. 4928, U. S. National Museum. 



Fig. 9. Type of Triceratops (Sterrholophus) flabettatus Marsh. No. 1821, Yale Museum. After Marsh. 



Fig. 10. Type of Diceratops hatched Lull. No. 2412, U. S. National Museum. 



The figures, except fig. 2, are all viewed from the left side and are all one-eighth natural size. 



208 



