256 Epwın CHAPın STARKS, 
ligamentous condition the entire distance between the opisthotic 
and the simple posttemporal, in others the proximal portion of the 
ligament is more or less ossified, the bony rod thus formed being 
an integral part of the posttemporal and representing the proximal 
portion of the missing fork. As stated the ossification invades the 
ligament to a varying extent in different specimens. In at least two 
Fig. B. Shoulder girdle. 
b basal plate representing actinosts. ce clavicle. cor coracoid plate. pr pectoral rays. 
The shaded portions represent cartilage. 
which have come under our observation, the fork of the posttemporal 
thus formed has extended almost the entire distance across to the 
opisthotic, the shape and relation of the bone being then entirely 
normal and usual.” 
