THE PHYTOSAURIA OF THE TRIAS 163 



5. Lophoprosopus gen. nov. 



L. (Belodon) kapffi von Meyer 

 (?) L. buceros Cope^ 



The generic value of the form represented by Belodon kapffi von 

 Meyer is well established. The name Lophoprosopus is here sub- 

 stituted because, as pointed out above, both Belodon and Phyto- 

 saurus are preoccupied. 



In the past several species have been based on very doubtful 

 material and referred to the group represented by L. kapffi. These 

 deserve, perhaps, brief mention here: 



Belodon (Zanclodon) arenaceus E. Fraas, a fragment of a man- 

 dible that resembles L. kapffi and may well belong to that species. 



Belodon ingens E. Fraas, a single skull very similar to that of 

 L. kapffi and probably the same. 



Belodon scop ax E. D. Cope. Judging from the snout this form 

 may well belong to the genus Palaeorhinus. 



Belodon superciliosus E. D. Cope. This species is based on a 

 few skull, teeth, and scute fragments and is very doubtful. 



Heterodontosuchus ganei F. A. Lucas. The fragment of a 

 mandible upon which this species was based was originally de- 

 scribed as a Triassic crocodile. According to McGregor^ we may 

 expect to find this to be identical with L. (Phytosaurus) buceros when 

 better material is at hand. 



6. Palaeorhinus Williston 



Palaeorhinus bransoni Williston 

 ( ?) P. scopax (see the reference to this species under the genus 

 Lophorhinus) 



7. Angistorhinus Mehl 



A . grandis Mehl 

 A. gracilis Mehl 



' Some question arises as to whether this form belongs here. To quote Dr. O. 

 Jaekel {Silzungsberichten der Gesellschaft naturforschender Freiinde, No. 5, Jahrgang 

 1910, pp. 219-20): "Durch die Gesamtform des Schadels, besonders die Vorwolbung 

 des pranasalen Schnauzenteils, die weit riickwartige Lage der Nasen und die weite 

 Vorstreckung der Squamosa-Ecke ist diese Form im Rahmen der Phytosawidae so 

 deutlich gekennzeichnet, dass ich fiir sie daraufhin einen neuen Gattungstypus vor- 

 schlagen, und ihm den Namen Metarhiniis geben mochte." 



It is probably well to refer this form tentatively to the genus Lophoprosopus till 

 further discoveries settle the point. 



- Op. cit., p. 94. 



