188 
ACTUTOPTERYGII. 
Geuus PELARGORHYNCHUS, W. von der Marck. 
[Zeitschr. deutsck. gaol. ties. vol. x. 1858, p. 242.] 
External bones slightly ornamented with short ridges and r 
of tubercles. Teeth in form of small, slender, hollow cones, m 
or less clustered. Pelvic fins arising nearly midway between ^ 
pectorals and anal ; dorsal fin occupying the greater P jrt ' 0 
back; anal fin opposed to the hinder part of the dorsal , ca ^ 
fin forked. Two paired series of scutes on the flank 11101 ^jdal 
enlarged, with a dense intermediate squamation of small rboni 
scales. 
Pelargorhynchus dercetiformis, W. von der Marck ^ 
1858. Pel-a rgorh yn c/iux dercetiformis, W. von der Marck, e 
deutsch. geol. Ges. vol. x. p. 243. ' 344 . 
1858. Pelargorhynchus blochiformis, W. von der Marck, 1 u • 
[Imperfect trunk ; Academy of Munster.] 0 nt ogn 
1863. Pelai-yorhynchus dercetiformis, W. von der Marck, 1 a 
vol. xi. p. 61, pi. xi., pi. xii. fig. 3. , , ■> yoL si> 
1863. Pelargorhynchus blochiformis, W. von der Marck, loc. 
P- 84, pi. xii. figs. 4-6. loC cit- 
1885. Pelargorhynchus dercetiformis, W. von der Marck, 
vol. xxxi. p. 261. 
Type. Imperfect distorted trunk ; Academy of Munster* . 0 f 
The type species, attaining a length of about 0 - 05. ^ ^ total 
head with opercular apparatus contained about five times in ^ ^ cU _ 
length to the base of the caudal fin. Pelvic fins wilh ° 1R ^ 
lated, six articulated and divided rays, arising slightly neai ^ 
anal than to the pectorals, considerably behiud the 01 '■ j DlU ch 
dorsal ; dorsal fin with 64 rays, the foremost the longest an 
deeper than the trunk, arising about twice as far from t e ^ u( . 16 
as is its termination from the caudal fin ; anal fin " it 1 ?cU tes 
rays, its hinder end opposite that of tho dorsal. ^ ater j , oWg of 
elongate-heart-shaped, marked with radiating lines or ^ ser ie« ; 
minute tubercles, and the upper series larger than the ow 
intermediate squamation very finely granulated. 
Form. Loc. Upper Cretaceous : Westphalia. ^ 
P 2112. Imperfect trunk showing median fins and tr. 
paired fins ; Sendenhorst. J 
P.1906. Fragment of trunk ; Sendenhorst. 
' Lawre nCf ’ 
As shown by a skull in the Kansas University Museum, 
tho jaws described by Cope under the generic name o 
