422 
CKOSSOPTERYGII. 
described and figured by Agassiz, Poiss. Foss. vol. ii. pt. ii. 
p. 177, pi. lx. a. his , figs. 1-5, 7-11 ; Lewes. 
ManteTl Coll. 
25792. The stouter of the two specimens figured by Dixon, Foss. 
Sussex, pi. xxx. fig. 33; Sussex. Dixon Coll. 
49934. Crushed specimen ; Lower Chalk, Southeram Pit, Lewes. 
Capron Coll. 
P. 5410. Five specimens ; Lewes. 
Presented hy P. E. Coomhe, Esq., 1888. 
49929. Three small specimens ; Tipper Chalk, Guildford. 
Capron Coll. 
47258. Ten specimens ; Grey Chalk, Dover. Gardner Coll. 
35553. Portions of coprolites ; Greensand, Tournay. 
Presented hy 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. lieuss, Denkschr. k. Akad. 
Wiss. Wien, math.-naturw. Cl. 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 Boyal 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 (Bept. u. Fische bohrn. Rreideform. 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. Peis, Pakeontographica, 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 Weissenberg, near 
Prague, is an imperfect head with opercular apparatus and some an¬ 
terior scales, now preserved in the Boyal 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 
Pakeontographica, vol. xx. pt. ii. (1875), p. 218, pi. xliv. figs. 1, 2. 
The specimens are now in the Boyal Museum, Dresden. 
