116 BRITISH POSSIL VERTEBRATA. 
LISSOLEPIS, Davis. v. Eugnathus. 
serratus, Davis. v. Eugnathus serratus. 
LOPHACANTHUS, Stock. v. Pleuracanthus. 
taylori, Stock. v. Pleuracanthus cylindricus. 
LOPHIOSTOMUS, P. M. G. Egerton, Figs. and Descript. Brit. 
Organic Remains, dec. vi (Mem. Geol. Surv., 1852), no. 10. 
dizoni, P. M. G. Egerton, 7d/d., pls. x, x* ; A. S. Woodward, Proc. 
Geol. Assoc., vol. x (1888), p. 303. 
Loc. Chalk ; S.E. England. [Head, etc. ; Brit. Mus.] T. 
LOPHODUS, Romanovsky. v. Helodus and Psephodus. 
angularis, Davis. v. Helodus angular's. 
bifurcatus, Davis. v. Helodus bifurcatus. 
conicus, Davis. v. Helodus conicus. 
didymus (Agassiz), Davis. v. Psephodus magnus. 
gibberulus (Agassiz), Davis. v. Helodus gibberulus. 
levissimus, Davis. v. Psephodus magnus and Psephodus 
leevissimus. 
levis, Davis. v. Helodus levis. 
mammillaris, Davis. v. Helodus mammillaris. 
reticulatus, Davis. v. Helodus reticulatus. 
serratus, Davis. v. Venustodus serratus. 
sinuosus, Davis. v. Psephodus magnus. 
LOPHODUS, Symonds. v. Acrodus keuperinus. 
LOXOSTOMUS, L. Agassiz, Rep. Brit. Assoc., 1844 (1845), p. 303 
(name only). 
mancus, L. Agassiz, 2bz7., p. 308 (name only). 
Loc. London Clay ; Sheppey. [Imperfect head ; Brit. Mus.] 7. 
MACROPOMA, L. Agassiz, Poiss. Foss., Feuill., p. 55 (1835), and 
vol. ii, pt. 11 (1843), p. 174. 
egertoni, Agassiz. v. Eurypoma egertoni. 
mantelli, [-ii] L. Agassiz, Poiss. Foss., Feuill., p. 55 (1835), and 
vol. ii, pt. ii (1843), p. 174, pls. Ixva-d; W. C. Williamson, 
Phil. Trans., 1849, p. 462, pl. xlii, f. 25, 26, pl. xlii, f. 27-30 ; 
[-1i1] IT. H. Huxley, Figs. and Descript. Brit. Organic Re- 
mains, dec. xii (Mem. Geol. Surv., 1866), p. 27, pls. vil, vill ; 
J. Morris, Cat. Brit. Foss., 1854, p. 332; A. S. Woodware, 
Proc. Geol. Assoc., vol. x (1888), p. 303. 
Amia ? lewestensts, G. A. Mantell, Foss. S. Downs, 1822, p. 
239, pls. XxXVil, XXXvili. 
Loc. Chalk ; S.E. England. [Imperfect fishes ; Brit. Mus.] T- 
substriolatum, Huxley. v. Coccoderma substriolatum. 
