MASTODONSATTKTD^E. 147 



Genus CAPITOS AURUS, Minister \ 



Including Cyclotosaurus, Fraas 2 . 



Skull (fig. 34) with the muzzle often broad and obtuse ; palatal 

 vacuities expanded in front and approximated to muzzle ; a large 

 single premaxillary vacuity in the middle line ; orbits elliptical, and 

 approximated to the parietal foramen, generally small ; lyra in- 

 distinct and external to orbits and nares ; nares large, rounded, and 

 widely separated ; frontal short, pointed in front, and forming part 

 of inner border of orbit ; squamosal, postorbital, and postfrontal 

 very short. Premaxillary and maxillary teeth uniform ; a number 

 of small vomerine teeth parallel to those of the premaxillse ; one or 

 two large tusks in advance of and behind the posterior nares. Each 

 cranial bone strongly pitted at the centre, and in most cases 

 radiately grooved towards the periphery, but such groovings absent 

 in the supraoccipital, parietal, squamosal, postorbital, and post- 

 frontal. The auditory notch may be either open or converted 

 into a foramen (fig. 34). Median plate (interclavide) of thoracic 

 buckler intermediate between that of Mastodonsaurus and that of 

 Metoposaurus 3 . The fully adult teeth have no central pulp-cavity. 



Capitosaurus nasutus, Meyer 4 . 



Average length of cranium 0,330. Auditory slit open. Cranium 

 somewhat elongated, and narrowing anteriorly, with a sharp muzzle 

 and comparatively large orbits, of which the axis is somewhat 

 oblique to that of the cranium. Interclavide with rounded posterior 

 extremity like that of Metoposaurus. 



Hah. Europe (Germany). 



The following specimens are from the Bunter (Lower Trias) 

 of Bemburg, Northern Germany. 



40041. The cranium, in a somewhat imperfect condition. Both 

 frontal and palatal aspects are shown, but the extremity 

 of the muzzle is concealed by matrix. This specimen 

 accords with the imperfect type skull figured by Meyer 



1 Neues Jahrb. 1836, p. 580. 



2 Palagontographica, vol. xxxvi. art. 1, p. 121 (18S9).— Quoted from MS. 

 notes by Zittel in 1888. 



3 See E. Fraas, Palreontographiea, vol. xxxvi. p. 13."). 



4 Palseontographica, vol. vi. art. (>, p. 222 (1856). 



l2 



