Note 55 — Chapter XVIII · ON THE ADVANTAGES AND DISADVANTAGES OF CHANGED CONDITIONS OF LIFE: STERILITY FROM VARIOUS CAUSES.
Reading edition
Dr. Hancock, in ‘Charlesworth’s Mag. of Nat. Hist.,’ vol. ii., 1838, p. 491; R. Hill, ‘A Week at Port Royal,’ p. 8; ‘Guide to the Zoological Gardens,’ by P. L. Sclater, 1859, pp. 11, 12; ‘The Knowsley Menagerie,’ by D. Gray, 1846, pl. xiv.; E. Blyth, ‘Report Asiatic Soc. of Bengal,’ May 1855.