Distribution of the Rhabdophora. 61 



belong the Graptolitidse figured by Prof. Kjerulf from his 

 e*tage 8 of the Proterozoic rocks of Christiania *. They 

 include 



Monograptus priodon, Bronn. Retiolites Geinitzianus, Barr. 

 colonus ?, Ban-. Cyrtograptus, sp. 



Bohemia. — The forms enumerated by Barrande from the 

 Limestone beds of the etage E have a decidedly Salopian 

 facies f. They are 



Monograptus priodon, Bronn. Monograptus colonus, Barr. 



bohemicus, Barr. ckimsera, Barr. 



Roemeri, Barr, 



France. — Among the fossils collected by M. de Grasset at 

 Cabrieres, near Neffiez (Herault), in LanguedocJ, the following 

 Salopian group of Rhabdophora is noticed : — 



Monograptus bohemicus, Barr. Monograptus Rcemeri, Barr. 

 priodon, Bronn. 



These are found, as usual, in association with Cardiola 

 interrupta (Broderip) . 



(c) Lower Ludlow Beds. 



Wales. — The distribution of the Rhabdophora in the Lower 

 Ludlow rocks of Siluria was made the subject of special study 

 by Mr. Hopkinson in 1873; and a brief summary of his con- 

 clusions was communicated to the British Association in that 

 year. The results of my own hasty examination of these 

 rocks during the summer of 1879 were in the direction of 

 confirming his general conclusions, without adding any new 

 facts of special importance. 



According to Mr. Hopkinson the Lower Ludlow rocks of 

 Leintwardine and its neighbourhood afford § 



Monograptus colonus, Barr. Monograptus Salweyi, Hopk. MS. 

 leintwardinensis, Hopk. MS. Roemeri, Barr. tyc. 



Of these, Monograptus leintwardinensis is most emphati- 

 cally the characteristic fossil of the zone. I met with it in 

 extraordinary abundance not only near Leintwardine, but 

 also near Barrington, Adferton, and Vinnal, &c, near Ludlow. 

 I met with it also in swarms, but indifferently preserved, in 

 the Lower Ludlow of the neighbourhood of Presteign and New 

 Radnor. 



* Kjerulf, Veiviser, 1865, p. 31. 



t Barrande, Graptolites de Boheme, p. 18. 



X Tromelin et Lebesconte, Catalogue Foss. siluriens, 1875, p. 54. 



§ Hopkinson, Geological Magazine, 1873, p. 520; ibid. 1875, p. 501. 



