SCOMBRID^. 
469 
This is associated with a hinder portion of premaxilla and 
parts of the two dentaries, that of the left side nearly 
complete but with teeth, broken away. 
Presented hy Sir Richard Owen, 1880. 
P. 3958. Imperfect right mandibular ramus, showing many of the 
teeth ; Barton Cliff. Enniskillen Coll. 
37315. Anterior portion of left dentary, with teeth, shown of two 
thirds the natural size, from the inner aspect, in fig. 16 b; 
High Cliff. This is probably the specimen noticed by 
DoUo & Storms, Zool. Anzeig. 1888, p. 266. 
Purchased., 1863. 
P. 4545. Imperfect small left premaxilla; Barton Cliff. 
Enniskillen Coll. 
P. 1531. Anterior half of small left dentary; Barton Cliff. 
Egerton Coll. 
28882. Anterior end of small left dentary; Barton Cliff. 
Daniels Coll. 
Cybium lingulatum (Meyer). 
1846. Siihyrcenodus lingulatus, H. von Meyer, Neues Jahrb. p. 597 
(name only). 
1851. Sphyrcenodus lingulatus, H. von Meyer, Palseontogr. vol. i. p. 280, 
pi. xxxiii. fig. 14. 
1892. Cyhium, R. Storms, Bull. Soc. Beige Geol. vol. vi. Mem. p. 13. 
Type. Imperfect dentary. 
A large species with broad, much-compressed teeth ; known only 
by the dentary bone, which is more contracted at the symphysis 
than that of the two preceding species. 
Form. Log. Middle Oligocene : Hesse‘Darmstadt. 
P. 3959. Much-abraded anterior half of dentary, with bases of 
teeth; marked Dr. Kaup,” but locality not recorded. 
Enniskillen Coll. 
The following specimen may also be a fragment of a premaxilla 
of Cyhium, but is too imperfect for determination:— 
25819. Type specimen of Sphyrcenodus tenuis, F. Dixon, Geol. 
Sussex (1850), p. 112, pi. xi. fig. 24 (misprnited S. gracilis, 
p. 205); Middle Eocene, Bracklesham, Sussex. 
'' Dixon Coll. 
