HuTTON. — 0)1 Moa-bones at Kapua. 637 



abundant than M. casnarimis, while exactly the opposite was 

 the case at Hamilton, Kapua, and Glenmark. Moreover, bones 

 of M. didinus were common in the cave at Castle Kock, 

 Southland, explored by Mr. A. Hamilton,* while M. casita- 

 rinus was not even represented. It is therefore almost 

 impossible that they could have been male and female of 

 one species. 



Genus EURYAPTERYX. 



In the femur the head is long and rises nearly as high as 

 the trochanter ; the neck is slightly constricted below. The 

 internal trochanterial surface is concave or excavated. The 

 shaft is very variable in shape, usually flattened from front 

 to back, but sometimes it is laterally compressed ; the linea 

 aspera is not well defined. Tlie popliteal depression is mo- 

 derate, the two tuberosities confluent or nearly so, chiefly 

 situated at the apex of the depression. The distal extremity 

 is much expanded, and the intercondylar fossa is very deep on 

 both sides. The following characters distinguish it from the 

 femur of Meionornis : The head is longer and rises more 

 rapidly, the anterior surface of the shaft is flatter, and the 

 distal end is more expanded. 



The length of the tibia is between 8f and 11 times the 

 width of the shaft in the middle. The shaft is straight and 

 stout, the proximal posterior surface concave ; the antero- 

 outer surface flattened in the middle. The distal extremity is 

 less expanded inwards than in Pachyornis, and is nearly 

 always less than 3'3in. in width. 



The length of the metatarsus is between 3f and 4f times 

 the width of the shaft in the middle, which is nearly the same 

 in all three bones of the leg. The proximal articular surface 

 has the inner margin nearly straight (except in crassa). The 

 proximal interosteal foramina open anteriorly into a deep 

 depression, on the inner margin of which there is usually a 

 rough tubercle. The trochlea diverge moderately ; the second 

 is long, with a shallow depression on the outer surface, its 

 base is narrower than that of the fourth, but its anterior sur- 

 face is as broad as that of the third, which does not project 

 forward so much as in Pachyornis. 



In the Dunedin Museum there are two complete feet of 

 E. gratis, and in the Christchuvch Museum there is a com- 

 plete foot of E. pondcrosa and another of E. crassa, all 

 obtained from the sandhills at Shag Point. In all these there 

 are only four phalanges in the outer toe, so that this must be 

 considered the normal number in the genus. 



Trans. N.Z. Inst., vol. xxv., p. 102. 



