94 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
upper elements have been subjected to so much pressure that their articulations with 
the cleithrum cannot be defined. There is evidence, however, of a thin plate (supra- 
or post-temporal) that almost links the pectoral arch with the posterior margin of the 
cranium. Probably the wiiole arch has been forced posteriorly. The cleithrum 
(following tlio terminology of most modern systematists) is a very extensive bone, 
which carries the pectoral arch downw'ards and inw^ards. Although somewhat 
(lisru])ted, this bone has a broad ]}osterior flange in its central region, wiiilst the 
anterior margin is here very convex in section. 
Tile remains of a large pectoral fin are present (Plate X), and at least six rays 
are ]>reserved. These are bony and sjiine-like and are not segmented as in typical 
rays of Teleosts. In the matrix, near the base of the rays, are two large actinosts, 
wliich are somewhat constricted centrally, and, judging from their size, these sup])orts 
WTjuld he few in number. Jordan (1905, p. I) notes that in the Teleosts “ the actinosts 
are few (four or six) in number,” but they may remain numerous in the “ Ganoids.” 
On the right-hand side, deep dowm in the matrix, a portion of the right pectoral 
girdle is present. The presence of a mesocoracoid cannot be determined. 
Text-figure 3 . — Flmdersichthys dentneadi. Centra of vertebrae, natural size. 
Fer^e^ra.— Probably fourteen vertebree are present, but five of the series are 
hidden beneath the opercular and the scapular arches. The last two are only 
rejiresented by the right-hand moieties of the centra. The vertebra? are completely 
ossified and symmetrically cylindrical (Text-figure 3). There is no evidence of even a 
minute perforation for a persistent notochord. The centra are deeply amphicctlous. 
They are more than twice as deep as long (30 mm. x 11). There are fine transverse 
striations betw'een the anterior and posterior rims, which are thickened, the vertebrse 
being somewhat similar to those of Oligopleurus vecte^isis^ as described and figured by 
Smith Woodward. Remains of the neural arches can be obscurely seen in the matrix 
over some of the centra, but these appear to have been relatively small. There is no 
])iecise evidence of actual anchylosis with the centra. The neural spines on the 
anterior vertebrae are well developed, attaining at least 80 mm. 
This series of contiguous vertebra? has been pushed over somewhat to the left 
side of the fossil. Ihe most anterior vertebra is close to the basioccipital region, w hich 
has been located in the matrix on the right side. This vertebra, which is 
almost certainly the first of the series, presents no evidence of division or of special 
