PIvA.TB XXXI. 



Skull of Anogmius polymicrodiis Stewart, one-half natural size, 

 Den., Dentary; Art., Articular; J/.v., Maxilla; P/>ix., Premaxilla; 

 Q., Quadrate; 67/., Ceratohyal; Sc, Sclerotic ring; a, a, a, a, 

 Dermal plates; Op., Operculum; Fop., Preoperculum; lop., In- 

 teroperculum; Sop., sub-operculum; Or., supposed orbital bones. 



