iv BRITISH GRAPTOLITES. 



species now known as Glimacograjitm scahirix (Linni^ns), and tlio other Man ograjdnf^ 

 trianguJatus (Harkness), both of wliicli species are, according to Tnllberg, abnndant 

 in tlic blocks of shale occurring at this Scanian locality. 



]^7gg Following the same plan as that originally adopted by 



Linnxus, him in the first edition of his ' Systema Naturae,' Linnaeus, 



' Systema Naturae,' m his twelfth edition, still employed the term GraptolWms 



edit. 12. j;qj. inorganic markings or bodies which simulate fossils ; and 



he further divided his order Graptolithus into various species. 



Among these species of supposed false fossils, one (given as No. G) is described 

 as " Grajptolitlms Sagittarius, with toothed impressions, — ' Anonymum. Volkam. 

 Siles.,' 3, p. 332, vol. iv, fig. 6, — found in hard rock, with imbricate impressions, 

 toothed, Avithout a pedicel, regularly arranged, pointed towards the apex." An 

 examination of the figure which is given by Volkmann in his work ' Silesia subter- 

 ranea,' and which is referred to by Linnteus in the above descri})tion, makes it 

 quite clear (as has been pointed out by Tullberg and others) that it represents a 

 Lejndodendron or Sigillaria, and not a Graptolite at all. Thus the Linngean name, 

 Gr. Sagittarius, was employed for a Carboniferous plant, and cannot therefore be 

 retained for a species of Graptolite. 



Linnseus' species No. 7 of this twelfth edition of his ' Systema Naturae,' hoAvever, 

 is the same form as that originally described by him as Graptolithus in his ' Skanska 

 Resa ' of 1751. It is referred to in the text in the following words : — " Graptolithus 

 scalaris, looking like a line and transverse markings. Found in the common 

 shale of Scania." Linnfeus, however, gives no fresh figure. (Compare also loth 

 edition, Gmelin, 1793.) 



We find therefore that von Bromell described certain forms 



^Taici ^^o"^ known to be Graptolites as mosses or leaves, while 



' Naturgeschichte der Linnaeus described some others in his genus Graptolithus, 



Versteinerungen ziir believing them to be "false fossils" simulating true ones. 



Erliluterung der Walch, liowever, was the first naturalist to recognise tlie animal 



Knorr'schenSaramlimg ^^^^^^^^ ^^ ^j^^ organic remains of the type of the Graptolites 



d r Nat r ' *^^ ^^^° ' ^kilnska Resa.' In the supplement to a work of his 



suppl. iii. o^^'ii oil the fossils collected by Knorr, he figures two fossil 



forms or species which he considers to be minute Cephalopods, 



One of these is certainly the same form as that subsequently named by Hisinger 



Prlonotiis convolidus. Walch described this as a " unique species " with a testaceous 



body like a Litaites, and denticulated like the " denticulated Orthoceratites." " Its 



denticulated border proves that it was chambered, and the teeth mai'k the 



extremities of the chamber walls." 



The second form figured by Walch is also certahily a Graptolite, but it is 

 difficult to say from the figures to what species the examples given by him should 

 l)c referred ; but it is possible that tliey belong to the form known at })resent as 



