474 
ACTINOPTEETGIT. 
College of Surgeons, which were subsequently named Dictyodas 
destructor^ OweTi (Catal. Eoss. Kept. & Pisces Mus. Hoy. Coll. Surg. 
1854, p. 161). These specimens exhibit large, low an,d broad teeth, 
much laterally compressed, and vertically striated at the base, and 
are too imperfect for satisfactory determination. The following 
specimen may perhaps belong to this genus and species :— 
36166. Imperfect jaws, each exhibiting a single series of the 
characteristic large teeth flanked externally with a row 
of very small but similar teeth ; London Clay, Sheppey, 
Purchased, 1860. 
Genus SCOMBRAMPHODON, novum. 
Syn. }AmpkfrdOn, R. Storrn9.^(non Amphodus, Peters, 1872), Ann. Soc. 
G^pl. Belg. vol. xiii. 1887, Mdm. p. 265, 
An extinct genus known only by portions of skull, dentition, 
and vertebrae. Marginal teeth large and conical, not laterally 
compressed, in single series on premaxilla, in less regular series on 
dentary, which bears a supplementary external row of compara¬ 
tively small teeth ; minute clustered teeth on palatine. Dentary 
bone rapidly deepening behind the contracted but thickened 
symphysis. Vertebral centra not longer than deep, with two 
lateral pits. 
Scombramphodon benedeni, Storms. 
1887. Amphodon benedeni, R. Storms, Ann. Soc. Geol. Belg. vol. xiii., 
Mem. p. 265, pi. iv. 
Type. Associated portions of skull and vertebrae. 
The type species, with mandible probably about O’lo in length. 
Large teeth strongly plicated at base, not much incurved at apex ; 
those of dentary in a regular series, firmly fixed in rather deep 
sockets. 
Form. Loc. Middle Oligocene (Rupelian) : Rupelmonde, 
Belgium. /77rxc4F^ 
Not represented in the Collection. 
Scombramphodon curvidens. Storms. 
1887. Amphodon curridens, R. Storms, Ann. Soc. Geol. Belg. vol. xiii., 
Mem. p. 266, pi. v. 
Type. Associated portions of dentary and premaxilla. 
Large teeth of dentar}' more incurved than in the type species 
