li 
region are firmly united to a series of long neural and limmal spines, n liieli 
diminish in size towards the caudal pedicle. Like the supports of the inedian 
tins, these are only superiicially ossified, an inner rod of matrix showing the 
extent to which the cartilage persisted. 
Appendicular Skeleton . — As shown hy an impression in No. h, the 
inferior expanded end of the clavicle slightly turns forwards, appearing as if 
abruptly truncated ; Avhile the pectoral tin is placed just above the ventral 
border of the lish, and seems to have comprised only articulated rays. The 
pelvic tins (PI. Ihg. ]) also consist of articulated and distally bifurcating 
rays ; they arc relatively small though deep, having a remarkably short 
hasc-linc. The 2>clvic hn-siqiports are not shown. All the rays of the 
median tins are remarkably broad and robust, closely articulated and finely 
divided from a j^oint a short distance above the base ; the sub-divisions 
terminating in tine tilamcnts distally. In the dorsal and anal fins the rays 
ari'! widely s])aced, very long in front hut gradually decreasing in length 
behind. The foremost ray of the anal (and presumably also that of the 
dorsal) is the longest ; and at its base is a series of large, elongated fulcra, 
wliich 2>ass ujiwards into a tine fringe upon the ray. The fin-su2)|)orts (PI. 
Ill, Pig. 6 , h) are also very robust, forked and expanded at their distal end 
for union with the tin-rays (V), which they distinctly equal in nnmhcr; and 
all these hones are much elongated, their jwoximal or inner ends overla2)ping 
and extending between the neural and Inemai s|)ines of the axial skeleton. 
There are about seventeen rays in the anal tin, and not less than twenty-four 
in the dorsal. In the caudal tin the ravs are more closelv arranged than in 
Ihe other median tins ; there arc distinct small fulcra on the iqijier and lower 
border, and the hinder border docs not seem to have hecii excavated, although 
the s])ecimens are scarcely sufiicient to decide this character. 
S qua mat ion . — In the anterior half of the trunk (PI. IV, Pig. 1 ), as 
fill* as an ohlicpie line joining the origin of the dorsal and anal tins, the scales 
are relatively thick, quadrangular, and closely united hy the well-known 
peg-and-socket articulation (PL IV, Ihgs. 2 , 2 a). Along the dorsal and 
ventral borders there seems to have been an azygous series of scales, hut these 
are not enlarged ; and it is ]\ot 2)ossiblc to determine whether or not there 
were any especially large scales along the hinder margin of the clavicle. Tlie 
thick (2uadrangular scales are moderately overlaj)ped, and exhibit an inner 
vertical keel near the anterior border, which is iwolonged upwards into a very 
long articulating peg. Tkc jnanciiial scales of the flank (PI. lA", Pig. 2 ) are 
