204 Transactions of the South African Philosophical Society. 



fashion. Distally the ends are less expanded, and the middle meta- 

 tarsal is relatively a little longer than in Anchisaurus. 



The digits are proportioned almost exactly as in the American 

 genus. The ungual phalanx is more developed in Hortalotarsus, 

 but in nearly every other respect the resemblance is so close that 

 had the foot alone been discovered it would have been impossible to 

 have distinguished the specimens generically. 



The following are some of the principal measurements : — 



Length of ilium about 130 mm. 



,, femur ,, 200 



Breadth of femur at lower end 43 



Length of fibula 180 



,, 1st metatarsal about 55 



„ 1st phalanx of 1st digit 28 



2nd „ ,, 36 



,, 2nd metatarsal about 80 



, , 1st phalanx of 2nd digit 32 



2nd „ „ 18 



>> "^Cl >> >5 oo 



,, 3rd metatarsal , about 90 



„ 1st phalanx of 3rd digit 30 



2nd ,, „ 18 



>> ^ r< l >> >> 15 



4th ,, ,, 30 



4th metatarsal , about 82 



,, 1st phalanx of 4th digit 25 



2nd „ ,, 16 



3rd ,, ,, 14 



4th „ „ 14 



,, 5th ,, ,, about 21 



, , 5th metatarsal 45 



The vertebrae and most of the bones of the skeleton are hollow as 

 in Anchisaurus, and the agreement otherwise is so close that there 

 seems little doubt that Hortalotarsus must be placed in the family 

 Anchisauridse of Marsh, 



