CCELACANTHIDIE. 
417 
1844. Macropoma mantellii, L. Agassiz, ibid. vol. ii. pt. ii. p. 174, 
pi. lxv. a{bis)-d. 
1849. Macropoma mantelli , W. C. Williamson, Phil. Trans, p. 462, 
pi. xlii. figs. 25, 26, pi. xliii. figs. 27-80. 
1850. Macropoma mantelli, F. Dixon, Foss. Sussex, p. 368, pi. xxxiv. 
, fig ' 2 ' 
1866. Macropoma mantellii , T. H. Huxley, Figs. & Descrips. Brit. 
Organic Remains (Mem. Geol. Surv.), dec. xii. p. 27, pis. vii., viii. 
1888. Macropoma mantelli, A. S. Woodward, Proc. Geol. Assoc. vol. x. 
p. 303. 
Type. Fish ; British Museum. 
The type species, attaining a maximum length of about 0*55. 
Trunk robust but elongated ; head and opercular apparatus occupying 
about one quarter of the total length ; jugular plates about four 
times as long as broad. First dorsal fin large, consisting of not 
less than 8 robust rays ; second dorsal relatively small, consisting 
of numerous slender rays; principal caudal fin comprising about 
18-20 stout rays above and below. Mandible, post-maxillary, 
jugular plates, and operculum ornamented with numerous minute 
rounded tuberculations ; parafrontals, postorbitals, and suborbitals 
pitted; tubercles of scales large, elongated, numerous, and closely 
arranged. 
Although the specific name leivesiensis strictly pertains to this 
form, it seems advisable to employ the universally-adopted name of 
mantelli in honour of its discoverer. 
Form. <Sf Loc. Senonian and Turonian : S.E. England. 
4219. Type specimen, figured by Mantell, op. cit. pi. xxxvii., and 
by Agassiz, tom. cit. pi. lxv. a. bis , fig. 1 ; Lewes, Sussex. 
Mantell Coll. 
4253. Head and anterior abdominal region; the head figured ibid. 
pi. lxv. a. bis, fig. 2 ; Lewes. Mantell Coll. 
4269. Abdominal region, showing portions of dorsal and pelvic fins, 
and well-preserved squamation, figured ibid. pi. lxv. b ; 
Lewes. Mantell Coll. 
4256. Portion of trunk showing air-bladder, much distorted, a small 
coprolite, the pelvic bones, and some of the pelvic fin-rays, 
figured ibid. pi. lxv. c. fig. 1 ; Lewes. Mantell Coll. 
4264. Portion of jaws, figured ibid. pi. lxv. c. fig. 2; Lewes. 
Mantell Coll. 
4251. Portion of head and abdominal region, the jugular plate, 
PAET II. 2 E 
