Distribution of the Rhabdophora. 42i) 



tions of Mr. Linnarsson, the Middle Graptolite- Schists of 

 Scania are composed of the following subgroups of strata in 

 ascending order* : — 



(a) Zone with Phyllograptus typus (Hall ?), 



containing, in addition to Phyllograptus typus } representatives 

 of the under-named British species : — 



Didymograptus patulus, Hall. Climacograptus confertus, Lapw. 



geminus. His. perexcavatus, Lapw. 



Diplograptus Hopkinsoni, Nick. Sckarenbergi, Lapw. 



(b) Zone with Didymograptus geminus {Didymograptus 

 Murchisoni of British Paleontologists). 



This is characterized, like the corresponding British zone, 

 by the abundance of the tuningfork-shaped Didymograpti 

 generally know n under the names given above. They occur 

 together witli many of the same forms common in the under- 

 lying zone (with the notable exception of Phyllograptus) and 

 the addition of DiplograpAus foliaceus, Murch. 



(c) Zone with Glossograptus Hincksi, Hopk. 



The chief fossil of this zone is a beautiful form of Glosso- 

 graptus doubtfully referable to Hopkinson's species. The 

 Murchisoniiovm. Didymograpti are wanting ; and only a single 

 patulous species remains. Dicellograptus [Dicellograptus 

 moffatensis ?, Carr.) makes its first appearance in this zone. 



(d) Zone with Diplograptus mucronatus (Linnrs.). 



The characteristic fossil of this zone is a peculiar Graptolite, 

 probably an Idiograptus. The associated forms are identical 

 with, or allied to, the British species : — 



Diplograptus foliaceus, Murch. Climacograptus caudatus, Lapw. 



tricornis, Carr. Dicellograptus sextans, Hall. 



teretiusculus, His. moffatensis, Carr. 



(e) Zone with Climacograptus Scharenbergi, Lapw. 



This is marked by the prevalence of the species to which 

 the zone owes its name, and rarer examples of the represen- 

 tatives of 



Diplograptus foliaceus, Murch. Diplograptus teretiusculus, His. 

 Hopkinsoni ?, Nich. Didymograptus superstes, Lapw. 



* Linnarsson, Geol. Foreuingens Forhandl. 1879, Bd. iv. no. 8. 



