60 Mr. C. Lapworth on the Geological 



and in Prof. Nicholson's fine collection I recognized, as being 

 also procured from these beds, 



Monograptus Halli, Barr. Monograptus dubius, Suess. 

 bohemicus, Barr. riccartonensis, Lapw. 



Scotland. — From the Riccarton Beds of the basin of the 

 Solway, which stand generally in the place of the Wenlock 

 of Siluria, the following forms have been collected by Mr. 

 James Wilson or myself* : — 



Retiolites Geinitzianus, Barr. Monograptus vomerinus, Nich. 



Cyrtograptus Carruthersi, Lapw. colonus, Barr. 



Monograptus priodon, Bronn. dubius ?, Suess. 



riccartonensis, Lapw. 



Near Straiton, in the county of Ayrshire, beds probably 

 belonging to the base of the Riccarton series afford 

 Monograptus vomerinus, Nich. Cyrtograptus, sp. 



From the Wenlock strata of Habbies Howe, in the Pent- 

 land Hills, Mr. Henderson f has collected 



lletiolites Geinitzianus, Barr. Monograptus priodon, Bronn. 

 colonus, Barr. vomerinus, Nich. 



Sweden. — According to the most recent communications of 

 Mr. G. Linnarsson, the Retiolites Shiffer of Scania, which 

 succeed the zone of Cyrtograptus Murchisoni, already referred 

 to, fall into two main divisions J, viz. : — 



(1) Strata with Monograptus testis, Barr. 



(2) Strata with Monograptus colonus, Barr. 



Near Jerrestad and Tomarp the dark grey schists with 

 calcareous nodules that compose the " Strata with Mono- 

 graptus testis " yield 



Monograptus testis, Barr. Monograptus colonus, Barr. 

 priodon, Bronn. Cyrtograptus, sp. 



The overlying " Strata with M. colonus " are comparatively 

 barren greenish and grey schists, and have a wide geographical 

 extension in Scania. They afford principally 



Monograptus colonus, Barr. Monograptus Barrandei, Suess. 

 priodon ?, Bronn. 



and they are especially characterized by the presence of Car- 

 diola interrupta (Brod.), which is unknown in the underlying 

 Scanian formations. 



Noricay. — To this general Wenlock horizon probably 



* Lapworth, Scottish Monograptidse, Geol. Mag. 1870. 

 t Lapworth, Trans. Edinburgh Geol. Soc. 1874. 



| Linnarsson, Observations on Graptolitiferous Schists of Scania (Geol. 

 Foren. Forhandl. 1870, p. 256). 



