clxviii 



BRITISH GRAPTOLITES. 



1911. 



Tornquist, S. L., 



" Graptolitologiska 



bidrag," III-VII, 



' Geol. Foren. For- 



handl.,' vol. 33, 



pp. 421-438, pis. v, vi. 



Tornquist describes his discovery of Lasiograptus (Hallo- 

 graptus) mucronatus, Hall (= var. bimucronatus, Nich.), in the 

 Flag-kalk of the Siljan region, together with Glyptograptus 

 teretius cuius, His., and discusses the geological horizon of 

 the containing beds. He treats of the synonymy of two 

 previously known forms in the upper Didymograptus Shales 

 of Fogelsang, and classes them as Didymograptus bifidus, Hall, and D. lentus, 

 Tornquist, sp. nov. He indicates the resemblance of Gyrtograptus Ulrichi, Ruede- 

 mann, to G. multiramis, Tornq., and describes and figures three forms from the 

 Phyllograptus densus zone of Flagebro, viz. an example of the form Chaetoides, 

 Gurley, and two of Glonograptus. A specimen of Dendrograptus conf. serpens, 

 Hopk., is also described by him from Bornholm. 

 1911. 



The author figures and describes a radiating assemblage 

 of examples of Qlimacograptus scalaris, from the Rastrites 

 beds of Westrogothia, of the type of one of Ruedemann's 

 " synrhabdosomes." 



Horn, E., 

 " Erne Graptolithen- 

 kolonie aus West ergot- 

 land," ' Greol. Foren. 

 Forhandl.,' vol. 33, 

 pp. 237-239. 

 1911. 

 Wade, A., 

 " Llandovery and 

 Associated Rocks of 

 N.E. Montgomery- 

 shire," 'Quart. Jo urn. 

 Geol. Soc.,' vol. lxvii, 

 pp. 415-459. 

 1911. 

 Watney, 0. R., and 

 Welch, E.G., 

 " Zonal Classification 

 of Salopian Rocks, 

 Cautley and Raven- 

 stonedale," ' Quart. 

 Journ. Geol. Soc.,' vol. 

 lxvii, pp. 215-237. 



1912. 

 Tornquist, S. L., 

 ' ' G raptol itologiska 

 bidrag," VIII, IX, X, 

 ' Geol. Foren. For- 

 handl.,' vol. 34, 

 pp. 603-622, pi. viii. 



original specimen. 



A summary of the results of the author's field work in 

 the Welshpool district, the sequence described ranging from 

 Llandeilo-Caradoc (Glenkilk-Hartfell) to Lower Ludlow in- 

 clusive. Twenty-eight Graptolite species are noted in the 

 succession, and their stratigraphical and distributional ar- 

 rangement described and discussed. 



An account of the detailed local sequence in the Wenlock 

 and Lower Ludlow beds of a large area in Westmoreland, 

 especial attention being devoted to the Graptolites present. 

 Six distinct Graptolite zones are distinguished and named. 

 Thirty-four distinct forms are recognised, and their localities 

 and ranges given and discussed. 



In the first of these contributions Tornquist gives a 

 minutely detailed critical review of the history of discovery 

 and opinion respecting the species Monograptus spiralis, 

 Geinitz, illustrating it by a plate, including not only Geinitz's 

 original species, but also those of examples collected by 

 Eisel from the actual locality whence Geinitz obtained his 

 In the second contribution Tornquist discusses the asserted 

 synonomy of Monograptus discus, Tornq., and M. veles, Richter. In the third he 

 makes known the presence of the British zonal forms, Diplograpbus acuminatus, 

 Nich., and J), vesiculosus, Nich., in the Lower Rastrites Shales of Rostanga. 



