Distribution of the Rhabdopthora. 57 



themselves. The whole of the forms hitherto published by 

 Barrande from this zone are given in the subjoined list * : — 



Diplograptus folium, His. Monograptus cliimara, Barr. 



palmeus, Barr. testis, Barr. 



Monograptus priodon, Bronn. spiralis, Oeinitz. 



bohemicus, Barr. turriculatus, Barr. 



Rcemeri, Barr. proteus, Barr. 



colonus, Ban*. Rastrites Linnaai, Barr. 



nuntius, Barr. fugax, Barr. 



Ilalli, Barr. gemmatus, Barr. 



Becki, Barr. peregrinus, Barr, 



Nilssoni, Barr. Retiolites Geinitzianus, Barr. 



To judge from this catalogue the band Eel includes repre- 

 sentatives of the Upper Birkhill, Gala, and Wenlock beds of 

 Britain and Scandinavia, where the forms in italics are ex- 

 clusively Wenlock and Ludlow species. 



France. — The only Graptolitic strata of Llandovery age 

 hitherto detected in France are portions of the Ampelite-beds 

 of Anjou and Bretagne, &c. They form two consecutive 

 groups, the Schiste ampeliteux and the Calcaire ampe- 

 liteux, both rightly referred by the French geologists to the 

 Third Fauna of Barrande. These Ajnpelite-heds must in- 

 clude also strata of Wenlock age. 



In the Ampelite-Schists of Maine et Loire M. Farge has 

 collected f 



Monograptus colonus, Barr. Monograptus spiralis, Gein. 



Becki, Barr. Diplograptus folium, His. 



Nilssoni, Barr. 



From the higher zone with nodules ampeliteux, the repre- 

 sentative of the A mpelite- Limestone of other districts, Messrs. 

 Tromelin and LebesconteJ have obtained 



Monograptus bohemicus, Barr. Monograptus priodon, B -onn. 

 Becki, Barr. Retiolites Geinitzianus, Barr. 



In their catalogue of the fossils of Anjou and Bretagne 

 these authors enumerate from the A mpelite- Schists § 



Diplograptus folium, His. Monograptus Nilssoni, Barr. 



Monograptus Becki, Barr. spiralis, Gein. 



colonus, Barr. 



Monograptus testis, Barr., is quoted from the Ampelite- 

 Schists of the department of the Sarthe. If properly identified, 

 I suspect this is from higher beds, of true Wenlock age. 



* Barrande, Grapt. de Boheme, p. 18. 



t Tromelin and Lebesconte, Catalogue Silurian Foss. 1875, p. 52. 



| Iidem ibid. § Ibid. Table A. 



