AMERICAN LABYRINTHODONTIDM 



585 



type of animal or to a particular region in the column of Anaschisma 

 it is impossible to say. They agree in all respects with the others, 

 save in being opisthocoelous. All of the others are slightly amphi- 

 coelous. 



Pectoral girdle. — The clavicles and interclavicles collected from 

 the Lander region were in such a poor 

 state of preservation that nothing has / 



been made out concerning their charac- 

 ters to add to what Mr. Lucas has 

 published about Metoposaurus Jraasi. 

 One of the interclavicles evidently 

 helongs to that species, but some of 

 the others show very different types of 

 sculpturing, and probably belong to 

 different genera. 



A cleithrum was found in position 

 with one of the clavicles. It was com- 

 plete when the writer removed it from 

 the rock, but unfortunately part of the 

 upper end was lost in transportation. 

 In the figure this is restored. The 

 "bone is about i2 cm long, expanded at 

 the base, and tapering to a point at 

 the top. It projects upward and for- 

 ward from the antero-outer end of the 

 clavicle at an angle of about 45 . 

 It is very different in shape from the 

 •cleithra that have been described from 

 other Stegocephalians, but it can be 

 homolocnzed with no other element. 



h 



Fig. 6. — Anaschisma; cleithrum, 

 natural size. 



Anaschisma browni, sp. nov. 



(Figs. 7, 8, and 10) 



Skull broad posteriorly; proportion of greatest length to greatest 

 width about 10 to 9. Bones of roof of skull coarsely sculptured, 

 pitting predominating anteriorly, ridges and furrows posteriorly. 

 JVIucous canals of the lyra beginning in a deep depression just inside 



