158 MAURICE G. MEHL 



this form. Several new features were presented in this paper. To 

 quote : 



The new features which the present study has disclosed may be here 

 summarized: The presence of the otic capsule and its relations and dimensions 

 have been delineated. The sutural relations of the palatines, pterygoid, and 

 vomer have been more clearly delineated and the unsuspected posterior 

 extension of the latter elements as far as the presphenoidal vacuity demon- 

 strated. 



And again (p. 147) : 



In Mystriosuchus the parietals extend backward between the supratemporal 

 openings at the level of the top of the skull for a little less than one inch, while 

 in Palaeorhinus they extend in this direction two and one-fourth inches, are 

 widely separated as already described, and meet the squamosals posteriorly 

 to inclose the supratemporal at the upper level of the skull. 



With these particular things in mind, viz., the posterior extent 

 of the vomers, the otic opening, and the parieto-squamosal arcade, 

 the writer has made a careful examination of the material repre- 

 senting this form. The skull is very much crushed, especially the 

 palate, and few of the sutures are discernible. As the specimen is 

 now prepared the articular face of the quadrate is turned almost 

 directly outward instead of down, thus greatly exaggerating the 

 posterior width of the skull. Basing the outline of a posterior view 

 of Palaeorhinus on either Mystriosuchus or Angistorhinus , the 

 greatest width would probably be not over 240 mm. in an uncrushed 

 condition, or but little if any greater than that of M. planirostrus. 

 In 1 91 1, in a paper cited above, Jaekel mentioned the peculiar 

 relations and development of the vomers in Palaeorhinus and pre- 

 sented figures showing what he considered a more likely interpre- 

 tation of the palate. Jaekel's interpretation is certainly more 

 phytosaurian. However, with the present state of the specimen 

 one can only say that it is probably not justifiable to consider the 

 vomers as extending back and forming the anterior border of the 

 "presphenoidal vacuity." Concerning the otic capsule little can 

 be said. The opening is present on the right side of the specimen; 

 the left side is restored. This region was restored in Angistorhinus 

 grandis from the impression of the inner surface of the bone. A 

 thin film of the bone was still present and showed no indications of 

 such an opening. Indeed, to the writer's knowledge, Palaeorhinus 



