FELID&. 4] 
present writer thinks it may possibly be intermediate between some 
of the Carnivora Primigenia (like the N. American Mesonyx) and 
the Carnivora Vera. The brain-case is larger than in Mesonyx, and 
the dentition less numerous and more macrodont. 
3 Argillotherium toliapicum, Davies '. 
Hab. England. 
35688. Part of the cranium, showing portions of the parietals, the 
maxille, palatals, pterygoids, and presphenoid; from the 
Lower Eocene (London Clay) of the Isle of Sheppey. The 
alveoli of pm. 3, pm. 4, and m.1 are shown; if m. 2 was 
present it must have been very small. This specimen is 
the type, and is described by Davies in the passage cited. 
Purchased, 1859. 

Suborder CARNIVORA VERA. 
The true Carnivora which come nearest to the Carnivora Primi- 
genia are some of the Viverro-canoids ; but it is necessary that these 
should be placed near the middle of the suborder. The juxtaposition 
of the Felide to the Carnivora Primigenia does not therefore indi- 
cate any close relationship between the two. 
Family FELIDA. 
This family is taken to include the Nimravide of Cope as well 
as the typical felines’. 
Genus MACH ZERODUS, Kaup’. 
Syn. Agnotheriwm, Kaup *. 
Cultridens, Croizet°*. 
Drepanodon, auct.® 
Meganthereon, Pomel’. 
Smuilodon, Lund °. 
1 Geol. Mag. dec. 3, vol. i. p. 438 (1884). 
2 Vide Paleontologia Indica (Mem. Geol. Sury. Ind.), ser. 10, vol. ii. p. 318 
(1884). 
3 Oss. Foss. d. Darmstadt, pt. 2, p. 24 (1833), Machairodus. 
4 Ibid. p. 28 (1838). 
° In Huot’s ‘Nouveau Cours Elémentaire de Géologie, vol. i. p. 265 (1837). 
® Given in 1826 as a specific name by Nesti. 
7 Catalogue Méthodique, p. 58 (1853). Originally given by Croizet and 
Bravard as a specific name. 
8 K. Danske Vid. Selsk. Skr. vol. ix. p. 293 (1842). / 
