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| Keywords: The Quarterly journal of the Geological Society of London (12736529043).jpg 700 <br> PROF OWEN ON THE RANK AND AFFINITIES IN <br> § 7 The Mandible ” In the lower jaw of Lacertians fig 20 <br> may be noted the following pieces in each ramus ” 32 dentary ; <br> 33 splenial ; si' coronoid ; 29 articular ; 30 angular ; 31 surangular <br> What is first noticeable in the connexions of these bones in a com- <br> parison of Lacertians on the one hand with Crocodilia and Chelonia <br> and with Ophidia on the other hand is the greater tendency in certain <br> sutures to mark off an anterior half of the ramus including the <br> dentary and splenial from the posterior half; with this modi- <br> fication that in the Iguanians fig 19 the coronoid piece si' would <br> go with the anterior division and in the Monitors fig 20 with <br> the posterior one <br> The subvertical suture in Amblyrhynchus fig 19 s-s runs from <br> above downward first between the surangular 31 and coronoid 31' ; <br> then between the surangular and the combined splenial 33 and <br> dentary 32 <br> In the Monitor Varanus niloticus fig 20 the subvertical suture <br> s-s runs first between the surangular 31 and the dentary 32 ; then <br> between the angular 30 and the combined dentary and splenial <br> A small part of the fore end of the coronoid 31' supplements the <br> upper end of this subvertical suture <br> In the Mosasaurus fig 18 this subvertical division s s of the <br> Fig 18 <br> Mosasaurus <br> ramus follows more closely the pattern of the Monitor than of the <br> Iguanians The chief modification is the formation of the lower <br> part of the suture by the angular 30 and splenial 33 exclusive of 35818877 110705 51125 Page 700 Text 33 http //www biodiversitylibrary org/page/35818877 1877 Geological Society of London NameFound Amblyrhynchus NameConfirmed Amblyrhynchus EOLID 35626 NameBankID 2536011 NameFound Chelonia NameConfirmed Chelonia EOLID 19671 NameBankID 4935336 NameFound Crocodilia NameConfirmed Crocodilia EOLID 1739 NameBankID 582627 NameFound Mosasaurus NameConfirmed Mosasaurus EOLID 4518635 NameBankID 4248162 NameFound Ophidia NameConfirmed Ophidia EOLID 2815988 NameFound Varanus niloticus NameConfirmed Varanus niloticus EOLID 790177 NameBankID 2546407 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 33 1877 Geology Periodicals Smithsonian Libraries bhl page 35818877 dc identifier http //biodiversitylibrary org/page/35818877 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-24 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12736529043 2015-08-26 20 02 17 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1877 Photos uploaded from Flickr by Fæ using a script Mosasaurus | ||||
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