﻿CXELACANTHID^. 417 



1844. Macropoma manteUii, L. Agassiz, ibid. vol. ii. pt. ii. p. 174, 

 pi. lxv. a(bis)-d. 



1849. Macropoma mantelU, W. C. Williamson, Phil. Trans, p. 462, 

 pi. xlii. figs. 25, 26, pi. xliii. figs. 27-30. 



1850. Macropoma mantelli, F. Dixon, Foss. Sussex, p. 368, pi. xxxiv. 

 fig. 2. 



1866. Macropoma manteUii, 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, torn. cit. pi. lxv. a. bis, fig. ". ; 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, 

 PAKT ii. 2 E 



