422 
ACTINOPTERYGir. 
1863. Platycormus oblongus , W. von der Marck, loc. cit. vol. xi. P- 2 i 
pi. i. tip;. 7. [Nearly complete fish ; Academy of Munster.] 
1868. Platycormus oblongus, W. von der Marck, loc. cit. vol. xv. p. ' 
1886. Platyco?mus germanus, W. von der Marck, loc. cit. vol. xxxi. 
p. 244. 
Type. Nearly complete fish; lionn University Museum and 
British Museum. 
The type species, attaining a length of about 0‘25. Length of 
head with opercular apparatus considerably exceeding halt the 
maximum depth of the trunk, and the latter measure nearl) 
equalling the length from the pectoral arch to the base of the cauda 
fin. Pelvic fins comprising a relatively short spine, one simple ia> 
closely articulated distally, and four rays both articulated an 
divided distally ; dorsal fiu arising in advance of the anal 11 
extending as far backwards as the latter to the base of the shoi 
caudal pedicle ; dorsal fin with seven stout, sharply-ridged spines, 
the seventh about two thirds as long as the next ray, which is t R ' 
longest, simple but closely articulated distally, and followed by f r0I, [ 
22 to 26 gradually shortening rays, both divided and articulate 
distally; anal fin much less elevated than the dorsal, with 
similar spines, one simple articulated ray, and from 1 8 to 22 divu e 
rays. Scales very finely and uniformly granulated and serrated. 
The differences between the two forms distinguished by W • V<|1 
der Marck seem to be due entirely to accidents in preservation. 
Form. & Loc. Upper Cretaceous : Westphalia. 
P. 506. Counterpart of type specimen in the Museum of tho 
University of Bonn, described and figured by Agassiz, 
loc. cit. ; labelled “ gewonnen auf’m Baumbcrg, 181 J- 
Eyerton 
Coll- 
P. 3976. Pine fish, chiefly in impression, apparently counterpart o 
the specimen figured by W. von der Marck, loc. cit. < ’ 
pi. i. fig. 1 ; Sendenhorst. The finely-ribbed spines m 
advance of the dorsal fin are especially well display <•'< , 
and there seems to bo an impression of a short, do iC‘ 
spine at the base of the foremost articulated but undiv i c 
ray of the pelvic fin. The fine granulations and serrations 
of tho scales are distinctly shown in impression. 
Enniskillen Coll. 
P. 3976 a. Smaller impression, equally fine ; Sendenhorst. 
five soft rays of tho pelvic fin are distinct, the foremc 
being only articulated distally, not divided. The squama 
tion is also well shown. Enniskillen 0 
