508 



FAUNA ANTIQUA SIVALENSIS. 



Figs. 17 and 17 a. — Lower jaw, anterior portion, both sides, showing 

 absence of any widening of symphysis. — B.M. 



Figs. 18 and 18 a. — Incisive ridge. — B.M. 



Figs. 19, 19a, 19 J, and 19 c. — Hipp. Sivalensis. Calcaneum. — B.M. 



Figs. 20, 20 a, and 20 J. — Hipp. Sivalensis. Astragalus. — B.M. 



Fig. 21. — Hipp. Sivalensis. Calcaneum and astragalus, placed in 

 situ. 



Figs. 22 and 22 a. — Anthracotherium Silistrense. Molars in Museum 

 Geol. Soc. 



Figs. 23 and 23 a. — Anthracotherium Silistrense. Molars in Museum 

 Geol. Soc. 



Fig. 24. — Anthracotherium Velaunum. Molars in Mus. Geol. Soc. 



Fig. 25. — Anthracotherium Velaunum. Molars in Mus. Geol. Soc. 



The Anthracotherium, like the closely allied Merycopotamus, formed 

 a link connecting the Hippopotamus with the Euminants. The molars, 

 however, depart less from the Hippopotamic type than in Meryco- 

 potamus.^ 



Plate LXIX. 



Figs. 1, 1 a, 1 h, and 1 c. — Sus giganteus (Falc. and Caut.). Upper, 

 palatal, lateral, and occipital views of skull. The zygomatic arches 

 are perfect. There are three molars on either side, and also the last 

 premolar. The specimen is broken off in front of the last premolar. 

 The extreme distance between the zygomata is much greater than in 

 Sus scrofa. The sub-orbital foramina are large, and the bone is deeply 

 channelled in fi-ont. From the Sewalik hills. — B.M. 



Length of fragment, 11'7 in. Between the most distant points of the zygomata, 

 8'5 in. Between the post-orbital processes, 5'1 in. Least breadth of cranium 

 between temporal fossae, I'l in. Height of occipital facet from lower border of 

 occipital foramen, 6'.5 in. Height of occipital foramen, '9 in. Breadth of ditto, 

 V in. Breadth of occipital condyle, 1'3 in. From lower border of occipital foramen 

 to posterior border of palate, 3'8 in. Height of cranium at sub-orbital foramen 

 from palate, 3'1 in. Breadth of ditto superiorly, 2-4 in. Least breadth of occipital 

 facet, 3'5in. Width of posterior nares, ■^ in. Length of three true molars, 3'2 in. 

 Of ditto, including last premolar, 3-7 in. Width of palate, posteriorly, 1-7 in. Of 

 ditto, anteriorly, TS in. Greatest breadth of alveoli, l'3in. Height of posterior 

 nares, V^ in. Greatest diameter of orbit, I'J in. 



Figs. 2, 2 a, and 2 h. — Sus giganteus. Fragment showing anterior 

 portion of skull broken oiF about the line of the sub-orbital foramina. 

 Upper, lateral, and palatine views. The three molars and two last pre- 

 molars are well seen, and are less ground than in fig. 1. — B.M. 



Length of fragment, 9' in. Width superiorly at sub-orbital foramen, 2'2 in. 

 Height, from palate, 4- in. Length of three true molars, 3'7 in. Of ditto, including 

 two last premolars, 5'1 in. Width of palate posteriorly, r6 in. Of ditto, anteriorly, 

 1'4 in. Greatest width of alveoli, 1'3 in. 



' Dr. F. was at one time inclined to 

 regard the Merycopotamus as identical 

 in genus with the Anthracotherium Ve- 

 launum of Cuvier. On Dec. 6, 1843, he 

 wrote thus to Capt. Cautley. ' What do 

 you think ! Our Hippo, dissimilis is iden- 

 tical in genus with Cuvier's Anthracothe- 



rium Velaunum ; that is to say, he mis- 

 named his specimen from imperfect ma- 

 terials. I have had the two heads chiselled 

 out, and intend describing th em under the 

 name of a new genus Merycopotamus 

 (merico, from the resemblance of the 

 teeth to those of a Euminant).' 



