40 REMINISCENCES OF 



with priority over me, whereas I had, as already 

 shown, preceded him by two years and a half. My 

 friend, Professor Judd, now President of the Geological 

 Society, has suggested to me another and more 

 kindly explanation of the delay in the publication in 

 question. In those days fewer papers were published 

 than now, and the quarto volumes of " Geological 

 " Transactions " did not appear at regular intervals. 

 Hence the possibility that my memoirs may have 

 been read during such an interval between the pub- 

 lication of two volumes and had to wait until the 

 next was ready for the press. 



Still later I applied the same method of investiga- 

 tion to rocks yet higher in the series, viz., the Corn- 

 brash, the Kelloway Rocks, and the Oxford Clay. 

 This inquiry and its results were embodied in a third 

 memoir, read on May Qth, 1838, and published in 

 the " Transactions " shortly afterwards. Subse- 

 quent researches have established the fact that very 

 thin zones of stratified rocks are often identified, 

 even by the presence of some single fossil, and such 

 horizontal zones are now recognised as having great 

 practical value. 



During my medical studentship my father and I 

 acquired considerable knowledge of the Birds and 

 Insects of Eastern Yorkshire. In the latter branch 

 of study we had made one fortunate discovery. 

 We had early collected a single specimen of a 

 beetle unknown to us, and were unable to learn 

 the name until we found in Curtis's " British Ento- 



