﻿422 CROSSOPTERYGII. 



described and figured by Agassiz, Poiss. Foss. vol. ii. pt. ii. 

 p. 177, pi. lx. a. bis, figs, 1-5, 7-11 ; Lewes. 



Mantell Coll. 



25792. The stouter of the two specimens figured by Dixon, Foss. 

 Sussex, pi. xxx. fig. 33 j Sussex. Dixon Coll. 



49934. Crushed specimen ; Lower Chalk, Southeram Pit, Lewes. 



Capron Coll. 

 P. 5410. Five specimens ; Lewes. 



Presented by P. E. Coombe, Esq., 1888. 



49929. Three small specimens ; Upper Chalk, Guildford. 



C apron Coll. 



47258. Ten specimens ; Grey Chalk, Dover. Gardner Coll. 



35553. Portions of coprolites ; Greensand, Tournay. 



Presented by Thomas Davidson, Esq., 1859. 



A species of Macropoma closely related to the typical M. mantelli, 

 and not satisfactorily distinguished by the published diagnosis, is 

 described as Macropoma speciosum, A. E. Eeuss, Denkschr. k. Akad. 

 Wiss. Wien, math.-naturw. CI. vol. xiii. (1857), p. 33, pis. i., ii. 

 The type specimen is a nearly complete fish, wanting the paired fins, 

 from the Turonian of the Weissenberg, Bohemia, and is now pre- 

 served in the Eoyal Bohemian Museum, Prague. It is said to be 

 distinguished from M. mantelli by the more slender form of the 

 trunk, the number of the fin-rays, and the proportions of the pterygo- 

 suspensorium ("infraorbital"); and a restoration is published by 

 A. Fritsch (Eept. u. Fische bohm. Kreideform. 1878, p. 26, pi. iii.), 

 partly based upon the type specimen, partly upon more recently 

 discovered examples. The cranial osteology of the latter is criticized 

 by 0. M. Eeis, Palaeontographica, vol. xxxv. (1888), p. 63, pi. iv. fig. 2. 



A second species of Macropoma in the Turonian of Bohemia is 

 determined by Fritsch (op. cit. p. 31, pi. iv. figs. 2-7) under the name 

 of M. forte. The type specimen, also from the 'vVeissenberg, near 

 Prague, is an imperfect head with opercular apparatus and some an- 

 terior scales, now preserved in the Eoyal Bohemian Museum ; it is 

 described as being characterized by scales relatively twice as large 

 as those of M. speciosum, while the frontal bones are somewhat 

 broader. 



Doubtful scales from the Planerkalk of Strehlen, near Dresden, 

 are assigned to Macropoma mantelli by H. B. Geinitz, Foss. Fisch- 

 schuppen Planerkalk. Strehlen (1868), p. 47, pi. iv. figs. 8, 9, and 

 Palaeontographica, vol. xx. pt. ii. (1875), p. 218, pi. xliv. figs. 1, 2. 

 The specimens are now in the Eoyal Museum, Dresden. 



