140 PROFESSOR OWEN ch. v. 



in 1864, as the following entry in Mrs. Owen's 

 diary records : — 



' Attgust 6, — To the Zoological Gardens with 

 R. to see the living aye-aye and the new monkey 

 house. We were glad to see the faithful and good- 

 natured keeper Hunt, the old friend of our early 

 days at the College of Surgeons. He made the 

 hippopotamus come out of the water and show 

 himself.' 



Ardiaopteryx mao'ura (Owen). 



Head, as seen in the second known specimen, now preserved in 

 the Eerlin Museum of Natural History. Natural size. 



Amongst Professor Owen's writings which 



o o 



appeared in 1863 may be mentioned his memoir 

 4 On the Archaeopteryx ' ('Trans. Roy. Soc.') ; 

 'On Dinornis,' Parts VII. and VIII. (< Trans. 

 Zool. Soc.') ; ' Osteology of Troglodytes and Pithe- 

 cus,' Nos. IV. and V. ; and ' Osteology of An- 

 thropoid Apes,' Nos. VII. and VIII. 



In September 1863, Owen, accompanied by 

 John Gould, was the guest of the Duke of 

 Northumberland at Alnwick Castle. Afterwards 

 they went to Lord Tankerville's, where, among 

 other things, they inspected the Chillingham cattle. 



