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| Keywords: The Quarterly journal of the Geological Society of London (12981233873).jpg 554 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY Feb 23 <br> very much so There is another point of resemblance in the slight <br> expansion only of the second pair of pleurse the appearance being <br> rather as if the third pair were abbreviated than as if the second were <br> at all lengthened <br> Lastly one of the specimens shows what is rarely met with <br> among Trilobites namely an injury or malformation the sixth and <br> seventh pleurae on the left side being shortened by the injury <br> 'Next I have to notice the occurrence of a very interesting fossil <br> brought to England by Dr Peuchtwanger and placed with numerous <br> other American fossils in the Great Exhibition of 1851 It is a cast <br> in a brown sandstone said to be a bouldered fragment from Georgia \ <br> and as the species appears to be distinct from any previously de- <br> scribed there seems no reason to doubt the locality The caudal <br> shield and part of the body are broken away but the greater part of <br> the carapace and ten body-rings remain It is about the size of <br> Conocephalus striatus from Bohemia and may be called <br> COKOCEPHALXJS ANTIQFATUS SpeC UOV Fig 2 <br> C sesqmuncialis conrexus glabella parabolica lobis inconspicuis ; genis vix <br> radiatis oculis medianis glabellam propioribus segmentis corporis pleuris cur- <br> vatis baud abrupte deflexis <br> Head or carapace semicircular convex compared with those of <br> other species the glabella somewhat parabolic and rounded not <br> truncated in front nor much expanded below It is convex and <br> the lobes are very obscure the specimen however has suffered <br> abrasion ; the lower pair of lobes are <br> rounded the middle pair of furrows remote <br> from these and the upper ones very near <br> the anterior end aU but obliterated <br> Cheeks convex ; the eye nearly midway <br> and about its own length from the posterior <br> margin Keck-furrow distinct not very <br> strong Facial sutures as in C striatus ; <br> the convex cheeks radiated less conspi- <br> cuously so than in that species The <br> ocular ridge if any existed must have <br> been very slight <br> The axis of the body- segments is convex <br> and narrow two-thirds the width of the <br> pleurae which are gently convex scarcely <br> flat even as far as the fulcrum and thence <br> curved down not abruptly bent as in C <br> striatus The fulcrum in the forward rings <br> is placed more than halfway out in the <br> tenth about halfway and the furrow which <br> bisects the pleura is shallower than in either <br> of the Bohemian species <br> The characters which distinguish C antiquatus from C striatus <br> which most resembles it may be briefly stated 1 The greater <br> convexity of the carapace especially the glabella which is long and <br> Fig 2 Outline-sJcetch <br> of Conocephalus an- <br> tiquatus Salter <br> Natural size <br> The hinder portion of the <br> body and the right cheek <br> have been restored 36162121 111474 51125 Page 554 Text v 15 http //www biodiversitylibrary org/page/36162121 1859 Geological Society of London NameFound C sesqmuncialis conrexus NameFound Conocephalus NameConfirmed Conocephalus EOLID 33694 NameBankID 210577 NameFound Conocephalus antiquatus NameConfirmed Conocephalus attenuatus Scudder S H 1869 NameFound Conocephalus striatus NameConfirmed Conocephalus striatus Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 15 1859 Geology Periodicals Smithsonian Libraries bhl page 36162121 dc identifier http //biodiversitylibrary org/page/36162121 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-07 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12981233873 2015-08-26 14 53 48 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1859 Photos uploaded from Flickr by FĂŚ using a script | ||||
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