410 Dr. 0. Herrmann — Distribution of Oraptolites, 



The Norwegian Graptolites are still but little investigated, as the 

 naturalists of this country have directed their chief attention rather 

 to geological investigations. There are two old memoirs by Boeck 

 and Scharenberg; then some species are enumerated by T. Kjerulf ;^ 

 there is a fragmentary working-up of the Norwegian Graptolites in 

 Brogger's great work ; '^ and also a small memoir by the author.^ 

 The further elaboration of the Norwegian Graptolites is in the hands 

 of G. Holm, who has already furnished some excellent memoirs upon 

 them.* 



Great Britain, which is so richly endowed from a geological point 

 of view, has, in different parts, excellent localities for Graptolites, 

 and the English palgeontologists, such as Murchison, Portlock, 

 Phillips, Sedgwick, Salter, Nicol, M'Coy, Harkness, and especially 

 Nicholson, Hopkinson, and the first authority in this department, C. 

 Lapworth, who have taken it upon them to investigate these localities 

 with unwearied zeal, have accumulated an abundance of material, so 

 that the British Graptolites must be regarded as those which have 

 been best investigated. In the districts established by the British 

 authors in their writings — Wales, the Lake District in the north of 

 England, Girvan, Ireland and Scotland — a whole series of localities 

 and systems of strata have become famous in the eyes of the Grapto- 

 litist. In Wales this is the case with the neighbourhood of St. 

 Davids (Arenig and Llandeilo rocks), with the Shropshire district 

 (Caradoc and Salopian formations), and the vicinity of Conway 

 (Tarannon). In the Lake-District in the north of England we 

 know the neighbourhoods of Skiddaw and Sedgwick by the Skiddaw 

 Slates of Arenig age, theConiston Mudstones ofSkellgill (Llandovery 

 formation), and the Coniston Flags (Salopian) which occur there. 

 Ireland has to show the known localities of the Bellewston Hills 

 and County Meath (Llandovery formation, i.e. Valentian), and in the 

 first rank the County Down, with Ballygrot (Caradoc and Llan- 

 dovery). Scotland, finally, presents the Glenkiln or Lower Moffat 

 Shales of the neighbourhood of Moffat and the district of the Lead 

 bills; and, further, the Hartfell Shales or Middle Moffat Beds 

 (Upper Caradoc) and the Birkhill Shales (Llandovery) of the Moffat 

 district, as remarkably rich in Graptolites. 



In France Graptolites are found near FougeroUes, at Cabrieres 

 near Neffiez, near Poligne, La Menardaie, Domfront and Mortaiu, 

 Vretot, Crozon, Angers, Luchon and Caffiers. 



In the Pyrenean peninsula Graptolites have been detected both in 

 Portugal (in the vicinity of Oporto, — Lower Silurian) and in Spain 

 (in the deposits of Almaden and in the Sierra Morena, — Upper 

 feilurian). 



The Sardinian Graptolites are Upper Silurian. 



Continuing our wandering, we find the next localities for Grapto- 



^ " Veiviser ved Geolog. excursiouer i Christiania Oraegn." — Christiania, 1865. 



2 ' ' Die silurischen Etagen 2 und 3 im Kristianiagebiet und auf Eker."— Christiania, 

 1882. 



■'' '• Vorlaufige Mittheilung iiber eine neue Graptolithenart, etc.," in Nyt Mag. for 

 Naturv.,vol. xxvii. (188z), pp. 341-362. 



* In Ofv. Kongl. Vet. Akad. Forh. 1881. 



