54 
actinopterygij. 
The so-called Spaniodon Upturns (\\ r . von der March, Pakeontogr- 
vol. xli. 1894, p. 46, pi. v. fig. 5), from the Upper Cretaceous o 
the Baumbcrg, Westphalia, now in the Academy of Munster, does 
not belong to this genus or even to the same family. 
Genus THRISSOPTEROIDES, W. von der Marck. 
[Palmontogr. vol. xxii. 1873, p. 61.] 
Almost identical with Spaniodon, hut the dorsal fin comparative^ 
remote and opposed to the space between the pelvic and anal fio 
e arched maxilla bearing a regular close series of minute teet 
a pair of enlarged teeth at the symphysial end of the mandible. 
Thrissopteroides elongates, W. von der Marck. 
1873. Thrissopteroides elonyatus , W. von der Marck, Palseontogr- 
vol. xxii. p. 01, pi. ii. fig. 3. 
Type. Impression of nearly complete fish ; Academy of Munsb*' 
The type species, attaining a length of about 0-2. Length 0 
head with opercular apparatus twice as great as the maxima® 
depth of the trunk, and contained about throe times in the length 
ot the trunk from the pectoral arch to the base of tho caudal tin- 
ertebra) approximately 70 in number, about 18 being caudal- 
Pectoral fins large, with at least 11 rays, the longest two thirds ^ 
on„ as the head with opercular apparatus; pelvic fins not m 011, 
tuan half as large as the pectorals, arising considerably behind the 
middle point of the trunk ; dorsal fin completely opposito tho sp» c0 
between the pelvic and anal fins. 
Form. $ Loc. Upper Cretaceous : Westphalia. 
Not represented in the Collection. 
Thrissopteroides latus, W. von der Marck. 
1873. Thrissopteroides latus, W. von der Marck, Paleeontogr. vol. xxii- 
P- 62, pi. u. fig. 5, 
T ype. Nearly completo fish ; Academy of Miinster. 
^ LClU!> a ' luu t as large as the type, of comparatively stout l> r ° 
time, T’-? 6 , maximum de P fc h ^ the trunk contained about ft* 
raes in its length from the pectoral arch to the base of the candid 
undivid^ I 6 " 8 VCTy kr « (! > "'Uh about 17 rays, the 
divided; pehm fi ns about half as j as thc pcctora ls, with - 
rajs, the foremost undivided; dorsal fin comprising 3 undivided 
