Frof. H. O. Seeley — On Buhalus JBainii. 199 



In the median caiidals the centra have biconcave articular faces, 

 and weak neural spines. The distal caudals are longer thau wide, 

 with the ends nearly round and concave. 



14 15 16 



Fig. 14. — More distal caudal of same species ; side view. 

 Figs. 15, 16. — Front and bottom views of same vertebra. 



Figs. 17-19.— Distal caudal of same species; side, front, and bottom views. 

 All the figures are one-eighth natural size. 



EXPLANATION OF PLATES. 



PLATE IV.— (For Plate IV. see April Number Geol. Mag.) 



Fig. 1. Skull of Triceralops Jlahellatus, Marsh (seen from behind). 



Fig. 2. Skull of Triceralops porosus, Marsh ; (seen from the front) d. dentary ; 

 p. parietal; pd. pre-dentary; s. squamosal; e. epoccipital ; h. horn- 

 core; ^.quadrate; A', nasal horn-core ; r. rostral bone. 



Figs. 1 and 2, one-twentieth natural size. 



Fig. 3. Anterior part of skull of Triceratops prorsus, Marsh ; side view ; one- 

 eighth natural size. 



Fig. 4. Front view of same. 



Fig. 5. The same ; seen from below. 



h'. nasal horn-core; n. nasal ; na. narial aperture ; ptn. premaxillary ; r. 

 rostral bone. 



Fig. 6. Pre-dentary of same individual ; side view ; one-eighth natural size. 



Fig. 7. Bottom view. 



a. anterior end ; h. upper border ; d. groove for dentary ; s. symphysis. 



Fig. 8. Top view of same specimen. 



PLATE V. 



Fig. 1. Skull of Triceratops serratus, Marsh ; diagram ; seen from above, d. 

 epijugal bone ; /. frontal ; fp. postfrontal ; J. jugal ; m. maxillary ; n. 

 nasal ; pf. prefrontal ; ptn. premaxillary ; x-. pineal foramen (one- 

 twentieth natural size). 



Fig. 2. G'Ast oihr?iin-ca,yitj oi Triceratops serratus, Marsh; side view; one-half 

 natural size. 



c. cerebral hemispheres; cb cerebellum; m. medulla; ol. olfactory lobe; 

 on. optic nerve; p. pituitary body. 



Fig. 3. Maxillary tooth of Triceratops serratus ; outer view ; natural size. 



Fig. 4. The same tooth; side view. 



Fig. 5. The same tooth ; inner view. 



Fig. 6. The same tooth ; seen from below. 



[To be continued in our next Number.) 



11. — On Bubaltjs Bainti (Seeley). 

 By Professor H. G. Seeley, F.R.S., F.G.S., etc. 



YERY little is known in England of the Tertiary deposits of 

 South Africa. Some marine beds are found, as at Bathurst, 

 where the limestone is full ot teeth of Carchadon and Lamna, and 

 shells of Turritella Ostrea, Donax, and Lucina. The shells are 



