On the Pareiasaurlan genus Propappus. 357 



preserved though not in position. Of the right foot there are 3 toes 

 fairly well preserved. The well-preserved toes of the left foot are 

 believed to be the 3rd and 4th, because the most internal has 

 3 phalanges preserved, and as the last is not the ungual phalanx 

 this toe must have had 4 phalanges, and could therefore not be 

 either the 1st or 2nd. As there are 2 toes on its outer side we must 

 conclude that it is the 3rd toe. Assuming this to be so, the follow- 

 ing are the measurements of the bones : Metatarsal 45 mm. in length 

 and 35 mm. broad at its proximal, and 37 mm. at its distal end ; 

 1st phalanx 22 mm. in length and 36 mm. broad ; 2nd phalanx about 

 12 mm. in length and 29 mm. broad ; 3rd phalanx 10 mm. in length 

 and about 28 mm. in breadth. In the toes of the right foot the 3rd 

 toe is equally well preserved, and here the ungual phalanx is pre- 

 served. It measures 37 mm. in length and 33 mm. in breadth. The 

 4th toe is about as well preserved as the 3rd. The metatarsal 

 measures 55 mm. in length by 35 mm. broad at its distal end ; the 

 1st phalanx is 25 mm. long and 33 mm. broad ; the 2nd phalanx is 

 16 mm. long by 29 mm. broad ; the 3rd 15 mm. by 28 mm. In the 

 right foot the 3 terminal phalanges are preserved in contact, as well 

 as the metatarsal and 1st phalanx, but these latter not in contact. 

 The ungual phalanx measures 32 mm. long by 24 mm. broad ; the 

 penultimate phalanx 13 mm. by 28 mm. ; and the 3rd last 15 mm. 

 by 28 mm. It therefore seems probable that the 4th toe had 

 5 phalanges. The 5th toe is badly preserved. The metatarsal is 

 elongated and more slender than the 4th. The Ist phalanx measures 

 15 mm. long by 24 mm. broad. The other phalanges are not pre- 

 served in either foot. The 2nd toe has been reconstructed. The 

 3 phalanges are in contact, and the metatarsal is most probably 

 rightly identified. The latter measures 33 mm. long by 32 mm. 

 wide. The 1st phalanx is 13 mm. long by 35 mm. wide; the 2nd 

 10 mm. by 32 mm. wide ; and the ungual phalanx 35 mm. long by 

 34 mm. wnde. The 1st toe is much stouter than the others. The 

 metatarsal measures 37 mm. long by 50 mm. broad. The 1st 

 phalanx is 35 mm. long and 37 mm. broad. It is very thick, but 

 whether this is due to the bone itself or to a dermal ossification above 

 the bone is uncertain, but the appearance suggests a dermal ossifica- 

 tion. The terminal phalanx is 40 mm. long by 38 mm. broad. 



Though all doubt is not yet removed, some further light is thrown 

 on the debated point of the digital formula oi Pareiasaiirus. Almost 

 the only evidence we have had hitherto has been the British Museum 

 specimen described by Seeley. Unfortunately in it, though most of 

 the phalanges were discovered, they were considerably displaced. 



