Br. S. Woodioard — On Iguanodon ManteUi. 11 



•nodon (since referred to Hypsilopliodon) from the Wealden of Cowleaze 

 Chine, Isle of Wight,' shows the remains of the ilium, with the 

 ischium and rod-like post-pubis attached to it, lying side by side. 

 But the anatomical importance of this specimen was not discovered^ 

 until Huxley redescribed it in 1869.^ 



In estimating the value of such comparative anatomical studies, 

 we must not, however, omit to take into account the circumstances 

 under which that work was performed, and when we look at the 

 enormous labour accomplished by Sir Richard Owen in describing 

 and figuring the vast number of detached bones and parts of skeletons 

 of new and remarkable Dinosauria in the Palseontographical Society's 

 volumes, we cannot fail to admire his untiring energy and wonder- 

 ful skill in deciphering so many difficult remains, and are no longer 

 astonished that he fell into some erroneous determinations, but 

 rather marvel that he made so few. 



More lately * Mr. J. W. Hulke, F.E.S., described a new species of 

 Iguanodon (I. Prestwicliii), from the Kimmeridge Clay, Cumnor 

 Hurst, near Oxford ; distinguished from I. ManteUi of the Wealden 

 by the shape of the vertebral centra, by fewer than five saci'al 

 vertebrae, and by the simpler character of its tooth-serrature. 



But interesting and numerous as have been the discoveries of 

 fragmentary remains of Iguanodon, in this country, they could only 

 have assisted us to a more or less conjectural notion of the living 

 aspect of this huge Dinosaur, whilst the restoration by Waterhouse 

 Hawkins (1865) was known to be erroneous in several particulars. 

 Two somewhat small Dinosaurs, allied to Iguanodon, have, how- 

 ever, been met with in England in a tolerably perfect state. The 

 first of these is from the Lower Lias of Dorset, obtained by the late 

 Mr. Harrison of Charmouth, and is a fairly-complete skeleton of a 

 herbivorous Dinosaur about 12 feet in length, closely allied by its 

 dentition to Iguanodon, and described by Sir Eichard Owen as 

 Scelidosaurus Harrisoni.^ This reptile was armed with lateral rows 

 of thick bony scutes, and exhibits considerable disparity between the 

 fore- and hind-limbs as well seen in Iguanodon, Compsognathus, and 

 many other Dinosaurs. There are four functional digits and one 

 rudimentary one in the pes. 



The researches of Prof. Huxley and of Mr. J. W. Hulke have 

 also made us acquainted with EypsiJophodon Foxii, obtained by 

 the late Eev. W. Fox from the Wealden beds of the Isle of 

 Wight. At first only known from fragmentary remains '^ in 1869, 

 ' it became possible in 1881 to speak of an almost entire individual 

 about 4 feet in length, preserved in one mass of matrix, besides 

 parts of several others more or less complete. The important 

 remains are figured by the Royal Society in twelve quarto plates, and 



1 Figiired by Owen in Pal. Soc. Foss. Kept. Wealden, tab. I. 1855. 



2 The two ischia and the pubes are marked in the original description as the right tibia 

 and fibula. ^ Quart. Journ. Geo. Soc. vol. xxvi. pp. 3-12, PI. ii. 



" Quart. Joui-n. Geol. Soc, 1880, vol. xxxvi. pp. 433-456, pi. xviii.-xx. 



5 Pal. Soc. Foss. Eept. Oolitic form. 1861, pi. 2, 4, 5, 6 ; and 1862, pi. 1-11. 

 Preserved in the British Museum (Nat. Hist.). 



6 See Quart. Journ. Geol. Soc. 1870, vol. xxvi, pp. 3-12, jjI. 1 and 2. 



