204 Dr. A. Smith Woodicard — On Dinodociis Mackesoui. 



to be wheeled about his room, and even to be carried into his garden 

 and to be taken for carriage drives, but in January, 1906, he broke 

 his leg, and was again entirely confined to his bed. The numerous 

 pencilled letters that I received at this time showed unabated cheer- 

 fulness and delight in his work. On July 17th, 1905, he wrote : 

 "What troubles me most is that I have such a vast lot of half 

 woiked-up scientific material, which takes me longer time than 

 1 could have expected to get into shape, and I fear I may never 

 be able to finish it," and many subsequent letters expressed the same 

 anxiety. He was able, however, to complete the paper " On the 

 Application of Quantitative Methods to the Studj' of the Structure 

 and History of Rocks," which is now being published by the Geological 

 Society, to send a note to Nature on the colouring matter of flowers, 

 and also to make some short communications to local journals. He was 

 greatly cheered when he heard of the reception of Ids paper, and by 

 the kind message from British and foreign geologists, to which he 

 replied by sending copies of his portrait to those who had signed it. 



Early in March Sorby's illness assumed a more alarming form, but 

 he was cheerful and busily engaged in discussing scientific problems 

 till within a few hours of his death, which took place on March 9th. 



His best epitaph would be that written hj himself: " My entire 

 life has been spent either in scientific research or in preparation 

 for it." John W. Judd. 



II. — Note on Dinodoccs IIackesoki, a Cetiosaukian feom the 

 Lower Gkeensand of Kent. 



By Arthvr Smith "Woodward, LL.D., F.R.S. 



IIST 1840 Mr. H. 13. Mackeson discovered a group of bones of a large 

 reptile in the Lower Greensand near Hythe, Kent ; and in the 

 following year the specimen was brieflj' noticed by Professor 

 (Sir Richard) Owen, who provisionally referred it to the genus 

 Polxiftycliodon} The fossil was presented by Mr. ilackeson to the 

 British Museum, and ten years later the bones were described in 

 detail by Owen,' who recognised tluit they agreed most closely with 

 those of the Jurassic Cetiosaurus, but still thought they might belong 

 to the ' crocodile ' whose teeth were Unown as Polyptychodon. 

 Subsequent discoveries pi'oved that Polyptychodon was a Pliosaurian, 

 with limb-bones quite different from those of the Hythe fossil reptile,^ 

 and Owen eventually realised that the specimen represented a species 

 of Dinosaur, to which he gave the undefined name Dinodocus 

 Ilachesoni} Without adding to our knowledge of Dinodocus 

 Lydekker ^ placed it in the family Cetiosaurid^, wliile Marsh ^ 



1 Proc. Geol. Soc, vol. iii (1841-2), pp. 325, 451 ; also Eep. Brit. Assoc, 1841 

 (1842), p. 157. 



- " Rept. Cret. Form." (Mon. Paloeont. Soc, 1851), p. 47, pis. xii, xiii, and 

 woodcuts. 



3 H. G. Seeley, Quart. Journ. Geol. Soc, vol. x.xxii (1876), p. 436. 



^ " Hist. Brit. Foss. Rept." (1884), iudex to vol. ii, p. ix. 



5 "Catal. Foss. Rept. Brit. Mus.," pt. i QSHS), p. 136. 



s Geol. Mag., Dec. Ill, Vol. YI (1889), 'p. 206. 



