RTEUCTUEE OF CERTAIN PALEOZOIC DIPNOI. 
Fig. 18. 
183 
par.sp 
op.K - 
clei.r.- 
-op.l. 
Saffenodus. Anterior portion of a specimen in the Attliey Collection, x about i. A dorsal 
B, ventral surface, clnv.l., left clavicle ; clav.r., right clavicle ; dei.r., rig-ht cleithrum 
■ f .o;-., circuraorbital ; o/j./., left operculum ; op.;-., riglit operculum ; ^mv.s;)., parasphenoid ; 
^;«., pterygoid ; jitJoii., post-tenaporals ; s.o^d. sub-operculum ; tab.h., left tabular horn 
covered by a scale. 
