viii MEMOIR. 



and Hebra. On returning to England he entered as a medical 

 student at University College, London, and in 187 1 again went 

 with Lankester to the Continent, this time to Leipzig, to study 

 under Professor Ludwig, who was quick to appreciate the 

 exceptional gifts of his pupil. Here he published his first 

 scientific memoir in the Berichte der Kon. Sachs. Geselhchaff 

 der Wissenschaften. 



On his return to England, in the autumn of the same year, 

 Moseley was invited to join the Government Eclipse Expedi- 

 tion, then fitting out for Ceylon, under Mr. Norman Lockyer ; 

 and from this time he discontinued his medical studies, and 

 turned all his energies to pure science ; though it would appear, 

 from his own account, that he did not finally abandon the 

 intention of following the profession of medicine until the next 

 year, when the offer of an appointment on the " Challenger " 

 decided him in the course along which he had been for some 

 time drifting. 



His first experience of the tropics was a source of unbounded 

 delight, frequently referred to in his conversation in later life. 

 He not only did good service as a member of the expedition 

 by making valuable spectroscopic observations in the neigh- 

 bourhood of Trincomali, but made, as he was wont, the fullest 

 use of his opportunities as a naturalist, travelled all over the 

 island, and returned home with a miscellaneous collection, 

 including a quantity of land Planarians. These last he worked 

 out at Oxford, and produced an important memoir " On the 

 Anatomy and Histology of the Land Planarians of Ceylon " ; 

 an admirable piece of work, and much appreciated by Professor 

 RoUeston, by whom it was communicated to the Royal Society, 

 appearing in the Philosophical Transactions for 1874. 



In 1872 came the appointment as a naturalist on the 

 scientific staff of the " Challenger." Moseley of course was 

 delighted. Here was an unlooked-for opportunity of travel- 

 ling to the remotest corners of the earth, of emulating in some 

 degree the example of the great author of the " Voyage of a 

 Naturalist on the ' Beagle.' " For some time he was engaged 

 in making preparations for the voyage, and in superintending 

 the fitting up of the zoological laboratory on board ship. The 



