OSTKOGT.OSSID.K. 
73 
ontogr. vol. xlvi. (1900), p. 257, pi. xxvi. figs. 5, 6. — 
Upper Cretaceous ; Kansas. [Mandible.] 
Anogmius favirostris, E. D. Cope, loc. cit. 1878, p. 178. — Ibid. 
[Skull.] 
The fragments of dentition catalogued below may perhaps belong 
to some unknown Cretaceous genus of Albulid®, but their relation- 
ships are uncertain. Similar specimens have been described under 
the names of Glcssodus heckeli, 0. G. Costa, Atti Acead. Pontan. 
vol. viii. (1864), p. 109, pi. is. figs. 12, 13 (Upper Cretaceous : 
Pietraroja, Prov. Benevento, Italy); Egertonia gaullina, J. Cornuel, 
Hull. Soc. Geol. France [3] vol. v. (1877), p. 620, pi. xi. figs. 31, 
82 (Gault ; Mouticr-en-Der, Haute Marne); and Pisodus foucardi, 
H. E. Sauvage, Bull. Soc. Sci. Nat. Yonne, vol. xxxiii. pt. ii. (1879), 
P- 50, pi. i. fig. 2 (Cenomanian ; Bassou, Yonne). 
47207. A convex, oval mass of well-worn teeth, without the support- 
ing bone ; Gault, Folkestone. Gardner Coll. 
47286. Two more irregular fragments of similar dentition, one 
convex, the other concave, both showing the small piles 
of successional teeth ; Gault, Folkestone. Gardner toll. 
37239. Convex group of well-worn smaller teeth ; Chalk Marl, 
D over . Purchased, 1863. 
T- 6107, P. 7498. Two groups of small teeth, less crowded and less 
worn ; Gault, Folkestone. The unabraded dental crown 
exhibits a slight median apical pit, from which delicate 
striae radiate outwards. No successional teeth are seen. 
Purchased, 1889, 1895. 
9159. Similar group of small teeth ; Gault, Folkestone. 
Purchased. 
Family OSTEOGLOSSID^E. 
Trunk irregularly fusiform or elongated. External head-bones 
®uch thickened, and cheek covered by robust plates ; supraoccipital 
hone not prominent, and parietals meeting in the middle line ; no 
basicranial canal ; snout not produced. Mandibular suspensorium 
nearly vertical or inclined forwards, and gape of mouth small or 
moderately wide ; premaxilla much extended along the oral border, 
but maxilla also entering gape ; marginal teeth with long base, in 
Vur y shallow sockets and anchylosed with the jaw, usually in a 
