Hector. — On Cnemiornis. 81 



plane, and are expanded with, a large pneumatic foramen (a) on the external 

 surface, overhanging which is a triangular articular surface (6). The coracoids 

 have not been found, bi\t must have been stout triangular bones 2 inches in 

 length and 1^ inches wide at the sternal attachment. The scapula also is 

 missing. 



Yertebr^. 



The following vertebrae have been preserved : — The 2nd, 3rd, 5th, 6th, 7th, 

 8th, 10th, nth, 13th, and Utli cervical; 2nd, 4th, 5th, and 6tli rib- 

 bearing or dorsal ; the last having no hypapophysis may be termed the first of 

 two pre-sacrals, the second of which is wanting. The total number of vertebrae 

 seems to have been : — 



Cervical .. ... ... . . ... ... 14 



Dorsal ... ... ... ... ... ... 5 



Pre-sacral ... ... ... ... ... ... 2 



Sacral ... ... ... ... ... ... 17 



The total length from the tip of the beak to the coccyx would be about 

 35 inches. 



EiBS. PL XIIL, figs. 3—7 and 7'. 



The 3rd, 4th, and 5th ribs of the right side ; the 6th and 7th of the left, 

 and also the 7th sternal rib of the same side, have been preserved. The first 

 six ribs have well pronounced uncinate processes («) with a broad attachment 

 one inch in length, that on the 6tli rib [a'), being bent backwai'ds so as to be 

 almost parallel with the bone, and having a blunt expanded tip. The ribs 

 are much compressed, their margins having wavy irregular outlines. They 

 are broad in the middle and taper oiF towards each extremity, when viewed 

 laterally. The last two ribs articulated with sacral segments, the total 

 number having proVjably been nine. The number of sternal ribs was seven. 



Humerus. PL XII., figs. 4 and 5. 



The humerus has already been described, so far as it differs from the bone 

 attributed to Cnemiornis by Professor Owen, and the femur, tibia, and tarso- 

 metatarsal have been figiired in PL XIV.A for convenience of reference by 

 collectors. They agree so perfectly with Professor Owen's description as to 

 require no further notice, except to point out that the external articular 

 process of the metatarse, instead of being obliquely refiexed, as in the goose, 

 swan, and other swimming birds, is straight, as in true cursorial birds, 

 indicating that the habit of the bird was rather to walk on land than swim in 

 water. 



The metacarpal (figs. 6, 7) is made up of the first and second digits, which 

 are completely fused at both extremities, leaving a narrow interspace (a) for less 

 than half the length of the bone. It resembles closely the corresponding bone 



h 



