CHIBOCEXIRIDiE. 
97 
portion ; about eight enlarged teeth of variable size in advance 
of the concavity. Dental crowns smooth, not facetted, the apex 
often a little curved inwards. 
Form. &[ Loc. Albian — Turonian : Kent. 
47 205. Imperfect light maxilla and associated vertebral centrum ; 
Gault, Folkestone. Gardner Coll. 
40146. Imperfect mandible ascribed to this species by E. T. 
Newton, loc. cit. p. 520 ; Lower Chalk, Hailing, Kent. 
Purchased , 1866. 
The following specimen is not specifically determined : — 
32392. Fragmentary remains of large fish ; Upper Greensand, Isle 
of Wight. Purchased, 1857. 
The following species have also been based upon fragmentary 
remains of jaws with teeth, but are not represented in the 
Collection : — 
Portheus australis, A. S. Woodward, Ann. Mag. Nat. Hist. [6] 
vol. xiv. (1894), p. 444, pi. x. fig. 1. — Lower Cretaceous 
(Bolling Downs Formation) ; Clutha Station, near Hugh- 
enden, Gidgery Creek, Queensland. [Jaws; Geological 
Survey of Queensland, Brisbane.) 
Portheus brachygnathus: Xiphactinus brachygnathus, A. Stewart, 
Kansas Univ. Quart. [AJ vol. viii. (1899), p. 107. Xiph- 
actinus lestrio, A. Stewart, ibid. vol. vii. (1898), p. 118, 
pi. viii. (ei-rore). — Upper Cretaceous (Niobrara Group) ; 
near Gorham, Bussell Co., Kansas. [Jaws ; Kansas 
University Museum.] 
Portheus lestrio, E. D. Cope, Proc. Acad. Nat. Sci. Philad. 1873, 
p. 337, and Vert. Cret. Form. West (Bep. U. S. Geol. 
Surv. Territ. vol. ii. 1875), p. 201, pi. xlii. figs. 1-3, 
pi. xlvii. fig. 1. — Upper Cretaceous (Niobrara Group); 
Kansas. [Imperfect skull ; Cope Collection.] 
Portheus lowi, A. Stewart, Kansas Univ. Quart. [A] vol. vii. 
(1898), p. 24, pi. ii. fig. 2. — Upper Cretaceous (Fort 
Benton Group); Fairbury, Nebraska. [Dentary bones; 
Kansas University Museum.] 
Portheus rnudgei , E, D. Cope, Bull. U.S. Geol. Surv. Territ. no. 2 
(1874), p. 40, and Ycrt. Cret. Form. West (1875), p.203. 
— Upper Cretaceous (Niobrara Group) ; Kansas. [Im- 
perfect upper jaw ; Cope Collection.] 
Portheus thaumas, E. D. Cope, Vert. Cret. Form. West (1875), 
i“AJvr rv. H 
