554 Transactions. — Geology. 



quoted: Length of skull, 92mm. (?) ; length of basis cranii, 

 27mm.; length of roof of cranium, 64mm. ; width at paroccipital 

 processes, 46mm. ; width at squamosals, 54mm. ; width at 

 temporal fossfe, 40mm. ; width at post-orbitals, 62mm. ; dis- 

 tance between temporal ridges, 35mm. ; height of cranmm, 

 38mm. ; width of tympanic cavity, 17mm. ; width of temporal 

 fossa, 19mm. ; width of orbit, 24mm. ; distance between optic 

 foran'iina, 10mm. ; greatest length of pre-maxilla, 57mm. (?) ; 

 length of body, 16mm. (?); width of body, 27mm.; length of 

 mandibular ramus, 85mm. ; greatest height of mandible, 

 14mm. ; least height of mandible, 8mm. ; length of mandibular 

 symphysis, 10mm. (?) ; width of mandibular symphysis, 2_6mra. 

 The skull undoubtedly belongs to Eunj apery x ; but m the 

 shape of the temporal fossse, in the small mammillar tuber- 

 osities, and in the small posterior angular processes of the man- 

 dible it approaches the skull of Cela. On the other hand, the 

 distance between the optic foramina and the narrowness of 

 the flat area between the temporal and lambdoidal ridges are 

 characters which connect it wnth Anomalornis. 



The cervical vertebrge have neural ridges as in Meionorms ; 

 the atlas and axis are missing. The thoracic vertebra re- 

 semble those of other species of Euryaptenjx, but there are 

 only two pairs of sternal ribs, which belong to vertebrae 

 Nos. 24 and 25. No. 28 is anchylosed to the pelvis, show- 

 ing that the bird is an old one. There are seventy tracheal 

 rings preserved with the skeleton, and about twenty more 

 were found, but were too brittle to be moved. The upper 

 rings are of the slender elliptical pattern, while the lower ones 

 are of the thick, rough, tube-like pattern, one pattern passing 

 into the other about half-way down. 



The sternum agrees with that of other species of Eury- 

 apteryx, but there are shght saucer-shaped coracoidal depres- 

 sions. The costal processes are large and horizontal. The 

 following are its dimensions : Length of body, 83mm. ; total 

 length, 152mm. ; width of body, 100mm. ; width across costal 

 processes, 152mm. 



The pelvis resembles that of other species of Euryapteryx. 

 The centre of the ilium is slightly in front of the centre of the 

 acetabulum. The length of the pre-acetabular portion of the 

 ilium is 127mm. (?), and its depth is 76mm. The width at 

 the antitrochanters is 165mm. 



Pachyornis rothschildi. 



Pachyornis rothschildi, Lydekker, Pro. Zool. Soc, 1891,. 



p.' 279. 



Figures.— Ijeg-hones, P.Z.S., 1891, pi. 38. 



Described from a set of leg-bones supposed to belong to 

 the same individual ; locality not known, but thought by Mr. 



