METRIOKHYNCHTJS L^EVE. 



The dimensions (in centimetres) of this specimen are : — 



Skull (PL X. fig. 1) : 



length in mid-dorsal line 48-0 



length of nasals 15-0 



distance between nasals and prernaxillse 10'0 



least width between orbits 5'5 



width between outer angles of prefrontals .... 11/4 



,, „ „ frontals ..... 9*8 



length of frontal anterior to temporal fossa? . . . 8-2 



Coracoid : length (approx.) 5-3 



Scapula : length (approx.) 6 - 4 



width of articular end 2-0 



Humerus: length 5-2 



Femur: length in straight line 21-0 



width of head 3-8 



E. 3014 (Leeds Coll. 5). Skull (PL X. fig. 2) and mandible, atlas, axis, and five other cervical 

 vertebral centra, sixteen dorsals with transverse processes, two sacrals, and thirty-five 

 caudals (PL X. fig. 5 ; text-fig. 65), numerous cervical and dorsal ribs, right coracoid 

 and scapula (text-fig. 69, B), humeri (text-fig. 69, B), right femur, tibia, fibula, and 

 almost all the bones of the tarsus and pes (PL X. figs. 3, 4) ; some chevrons. 



This specimen exhibits very well the form of the vertebrae at the bend of the tail 

 (text-fig. 65). The right hind limb (PL X. figs. 3, 4) is the most nearly complete 

 in the collection, and its value is increased by the fact that, so far at least as the 

 relations of the tibia and fibula to the astragalus and calcaneum are concerned, 

 the position shown is certainly correct, the bones being partially united in the natural 

 position by matrix. The structure of the tarsus is closely similar to that shown 

 by v. Meyer * in his figure of the foot of Rhacheosaurus ; it is also very similar to the 

 tarsus of Geosaurus figured by Fraas |. The tail in this specimen seems to be nearly 

 complete, probably only one, or at most two, terminal vertebrse being wanting (PL X. 

 fig. 5). 



The dimensions (in centimetres) of this specimen are : — 



Skull (PL X. fig. 2) : 



». length in mid dorsal line 45 - 



length of nasals (approx.) 13 - 5 



distance between nasals and prernaxillse . (approx.) 9"5 



least width between orbits (approx.) 4 - 



width between outer angles of prefrontals (approx.) 9 - 



Mandible : length 49-2 



depth at coronoid process 4*5 



* Fauna der Vorwelt : Eept. Lith. Schiefer (1860), pi. xvi. fig. 8. 

 t Palaeontographica, vol. xlix. (1902), pi. viii. fig. 9. 

 PART II. 2 C 



