Vol. 51.] ANNIVERSARY ADDRESS OE THE PRESIDENT. lxili 



Henry Bean Mackeson, of Hythe, Kent, was elected a Fellow in 

 1844, and had consequently been connected with the Society as a 

 non-resident country-Member for fifty years. He died in February, 

 1894, in his eighty-third year. Mr. Mackeson was well-known as 

 an archaeologist and geologist, and was the discoverer of the remains 

 of a large Dinosaur in the Lower Greensand from the vicinity of 

 Hythe, noticed by Fitton in the ' Proceedings of the Geological 

 Society,' June 10th, 1840 (vol. iii. p. 325), and described by Owen 

 under the genus Polyptycliodon, June 16th, 1841 (op. cit. pp. 449- 

 452) [see also Owen, Foss. Kept. Cretaceous Formation, 1851, 

 pp. 47-55, pis. xii. & xiii., Mon. Pal. Soc. 1851-64] ; later on re- 

 described by Owen as a Dinosaur under the genus Dinodocus 

 Mackesoni (Owen, Hist. Brit. Foss. Reptilia, 1884, vol. ii. p. ix). 



Joseph Bickerton Morgan was born in 1859. He was always 

 an earnest student of nature, and took a deep interest in the 

 geology of "Wales. He paid special attention to the rocks of the 

 Upper Ordovician and Silurian formations of Powysland and the 

 "Welsh border, from which he had obtained a large series of fossils 

 in beds above and below the boundary-line of these formations. 

 He was elected a Fellow of this Society in 1889. 



By the advice of Prof. Lapworth he began carefully to map these 

 strata, and succeeded in defining the lower limit of the Silurians 

 with considerable exactitude. He communicated his conclusions on 

 the subject to the British Association at Leeds, 1890. In 1892, 

 having obtained a free scholarship at the Poyal College of Science, 

 he came to London, and, after a year's study, succeeded in obtaining 

 the Murchison Medal and gift of books. 



In the summer of 1893 his health failed, and he was compelled 

 to abandon work and winter at Ventnor, where he rallied for a 

 time, but finally succumbed on the 8th March, 1894, in his 35th 

 year. He did excellent work in assisting to arrange the Powysland 

 Museum at Welshpool, to the fossils of which he largely added from 

 his own collections. 



Lord Swansea, better known as Sir Henry Ht/ssey Yivian, Bart., 

 formerly M.P. for the Swansea district, was the eldest son of the 

 late John Henry Vivian, Esq. Born at Singleton in 1821, he was 

 educated at Eton and at Trinity College, Cambridge ; was three 

 times married ; was Deputy Lieutenant of Glamorganshire, and 

 formerly Colonel of the 4th Glamorgan Bines. He was elected a 



