62 
or gular plate of Amia. ‘This, however, is so very 
problematical that to prevent confusion, Cunningham's 
term must be rejected. 
12.—Pe vic GirpDLE anp Fin (Fig. 9). 
Innominate or Pubic Bone (/n.).—Situated just 
behind the ventral. extremity of the clavicle. It is 
strongly connected by its dorsal extremity with the inner 
face of the clavicle opposite the upper boundary of the 
clavicular symphysis. It is also connected more or less 
for the whole of its length, and especially ventrally, with 
the innominate of the other side. In medium-sized plaice 
it consists of three pieces, but the tendency is for the lower 
extremity to calcify. The dorsal piece (1) is the largest 
and consists of a fairly strong posterior rod, produced 
below into a ventral spine, to which is attached in front a 
thin bony plate. Ventrally there is an obvious piece of 
cartilage (2) which gives attachment to a terminal car- 
tilaginous epiphysis (3), which in its turn supplies the 
surface over which works the sub-cartilaginous pad giving 
articulation to the fin rays. 
Fin Rays (/’.#.).—Articulate directly with the 
innominate except for the intervention of a sub-car- 
tilaginous pad as in the case of the pectoral fin. The fin 
rays here resemble those of the pectoral fin, and consist 
each of two pieces, but the latter diverge more proximally, 
and the posterior articular processes are terminal instead 
of sub-terminal as in the pectoral fin. The fourth and 
fifth of these processes, further, projected backwards and 
downwards instead of straight backwards as with the 
others (cp. fig.). None of the fin rays bifurcated, and 
there were the normal six of them in the pelvic fin of the 
specimen now described. 
