AMERICAN LABYRINTHODONTIDM 



573 



pass straight forward to in front of the middle of thepostorbitals, 

 thence outward and forward on the jugals, thence backward on the 

 jugals and quadratojugals to near the base of the skull, where they 

 turn upward slightly on the prosquamosal, and end at its posterior 



Fig. i. — Anaschisma broiuni; view of top of skull, one-fifth natural size. 



co, condyle; eo, epiotic; f, frontal; j, jugal; 1, lachrymal; m, maxillary; n, nasal; na, nares; o, 

 orbit; p, parietal; pf, prefrontal; pm, premaxillary; pmf, premaxillary foramen; po, postorbital; ps, 

 prosquamosal; ptf, post-frontal; qj, quadratojugal; s, squamosal; so, supraoccipital. 



margin. The part running forward on the squamosals and post- 

 orbitals is shallow and narrow, while the remainder is deeper and 

 twice as broad. 



The following are the dimensions of the skulls and of the open- 

 ings in the roof: 



