PLATE XIII. 



Eiichodus dolichus Cope. 



Figure 1. — Dissociated skull: art, articular;' 6s, probably a basi- 

 branchial; cl, clavicle; den, left dentary; den', portion of right dentary; 

 den", portion of right dentary; eh, epihyal; eth, ethmoid; he, hypei-co- 

 racoid; hco, hypocoracoid; pal, left palatine; paT, right palatine; pc, 

 pectoral rays; pr, proijtic; p, parietal; pt, pterygoid; scl, supraclavicle; 

 soc, supraoccipital ; sop, subopercular; sp, sphenotic. X %. No. 808. 



Fig. 2. — Bones of mandible: art, left articular; art', right articular; 

 ang, angular; pal, left palatine; pt, pterygoid; qu, quadrate. X %. 

 No. 816. 



Fig. 3. — Dissociated skull: hm, hyomandibular; iph, probably an in- 

 ferior pharyngeal; op, opercular; pop, preopercular. The remainder of 

 the lettering is the same as in figure 1. X %. No. 819. 



Fig. 4. — Pair of palatines, a quadrate and pterygoid. The right pala- 

 tine has its fang missing. X %• No. 810. 



