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| Keywords: The Quarterly journal of the Geological Society of London (13936884561).jpg 46 MR E LYDEEKER OX THE EEMAIXS AXD AEEIXITIES <br> the extreme stoutness of the shaft and the total absence of a dis- <br> tinct distal intercondylar groove on the anterior aspect The <br> name Cryptosaurus is however preoccupied by Geoffroy and this <br> form assuming it to be distinct from other types accordingly <br> requires a new generic name for which I would propose Crypto- <br> draeo <br> During a visit to the collection of Reptilian remains from the <br> Oxford Clay near Peterborough in the collection of Mr A N Leeds <br> of Eyebury I was shown the left femur of an Iguanodont Dinosaur <br> which I thought might perhaps prove identical with Cryptodraco <br> This specimen the owner has kindly permitted me to bring to the <br> notice of the Society The middle portion of the shaft has been <br> considerably crushed and broken but both extremities are entire <br> The shaft agrees with that of the femur of Hysilophodon and of the <br> North- American Camptosaurus Camptonotus and differs from that <br> of Iguanodon in its markedly forward arcuation The inner tro- <br> chanter has lost its free extremity but the basal portion shows that <br> it is of the pendant type characteristic of the two former genera <br> and not of the crested type found in Iguanodon The anterior <br> intercondylar groove is slightly less developed in this specimen than <br> in either of the Wealden genera but it is still present Compared <br> with the type of Cryptodraco this bone differs very widely so that <br> there can be no doubt as to both its specific and generic dis- <br> tinctness Thus it is much more slender ; its shaft more curved ; <br> the head smaller instead of larger than the great trochanter; <br> the lesser trochanter thinner and taller ; and the distal end less <br> flattened and with a distinct intercondylar groove The inner <br> trochanter is wanting in the larger bone <br> Leaving then the femur of Cryptodraco on one side as indicating <br> a totally distinct form we may look around for other described <br> Iguanodonts with which to compare our specimen <br> The close relationship existing between the Reptiles of the Oxford <br> and Kimeridge Clays those of the former being frequently some- <br> what smaller than their allies of the latter suggests that the present <br> form may be closely allied to Iguanodon Prestwichii of the Kimer- <br> idgian which was described some years ago by Mr Hulke in <br> our ' Journal ' and which Professor Seeley last year proposed to <br> separate generically under the name of Cumnoria The entire femur <br> of that form is unfortunately unknown but it could evidently have <br> been only slightly larger than the present specimen with which <br> as I have satisfied myself by personal examination the terminal <br> extremities agree very closely Evidence of affinity between that <br> species and Camptosaurus is shown by the angulated and flattened <br> haemal surface of the sacral vertebra and by the absence of anchy- <br> losis between these centra Having therefore two Iguanodonts <br> from contiguous deposits both of which show marked signs of <br> affinity with Camptosaurus the presumption becomes very strong <br> indeed that they are closely allied There is indeed no decisive <br> Attention is directed to these two types by M L Dollo in an interesting <br> article published in the ; Bull Sci France et Belgique ' 1868 pp 215-224 36939787 113696 51125 Page 44 Text 45 http //www biodiversitylibrary org/page/36939787 1889 Geological Society of London NameFound Camptonotus NameConfirmed Camptonotus EOLID 36172 NameBankID 4102246 NameFound Camptosaurus NameConfirmed Camptosaurus EOLID 4530721 NameBankID 4102296 NameFound Cryptodraco NameConfirmed Cryptodraco NameBankID 4129556 NameFound Cryptosaurus NameConfirmed Cryptosaurus EOLID 4533787 NameBankID 4130110 NameFound Cumnoria NameConfirmed Cumnoria NameBankID 4131081 NameFound Iguanodon NameConfirmed Iguanodon EOLID 4530741 NameBankID 4204832 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 45 1889 Geology Periodicals Smithsonian Libraries bhl page 36939787 dc identifier http //biodiversitylibrary org/page/36939787 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13936884561 2015-08-26 06 56 02 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1889 Photos uploaded from Flickr by Fæ using a script | ||||
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