30 NATURAL SCIENCE. Jan., 1893. 



constant proof of the patience, industry, and acumen of the author. 

 "The progress of Palaeontology since 1830," he wrote in 1866, "has 

 brought to light many missing links unknown to the founder of the 

 science. My own share in the labour led me, after a few years of 

 research, to discern what I believed, and still hold to be, a tendency 

 to a more generalised or less specialised organisation as species recede 

 in date of existence from the present time." 



Agnes Crane. 



(To he continued next month by an account of Sir Richard Owen's 

 Researches on the Vertebrata.) 



