544 PEOCEEDIXGS OF THE GEOLOGICAL SOCIETY. [JunO 17, 



2. Specimen of the same, enlarged. From the Coniston Flags of Skelgill. 



3. Another example of the same, possessing a peculiar fusiform shape, and 



showing the lines of growth running parallel to the cell-mouths ; 

 enlarged. From the Upper Llandeilo rocks of Dmnfriesshire. 



4. D. folium, His. (=the young form of J), palmeus'}), natural size. From 



the Coniston Flags of Skelgill. 



5. The same, enlarged. 



6. Small rotmded example of D. folium {=D. palmeus?), natural size. 



From the same locality as the last. 



7. The same, enlarged, to show the lines of growth. 



8. D. angustifolius, Hall, natural size. From the Coniston Flags of Skelgill 



Beck. 



9. The same, enlarged. This specimen is shown obliquely, so that the cel- 



lules appear to be more distinctly alternate than they really are. 



10. Base of J). tamarisciLS, Mch., natural size. Upper Llandeilo, Dumfries- 



shire. 



11. Specimen of D. tamariscus, showing a basal extension of the axis; en- 



larged. Upper Llandeilo, Dumfriesshire. 



12. Fragment of D. tamariscus, enlarged. From the Coniston Flags, pre- 



served in relief, and showing transTerse striae. 



13. Another specimen of the same, almost perfect, enlarged. From the 



Upper Llandeilo rocks of Dumfriesshire. 



14. Fragment of D. confertus, Ifich., natural size. From the Coniston 



Flags of SkelgiU. 



15. The same, enlarged. 



16. Fragment of D. mucronatus, Hall, enlarged ; introduced for comparison. 



17. Specimen of I), putillus, Hall, slightly enlarged. From the Coniston 



Flags of Skelgill. 



18. Portion of the same, enlarged still further. 



19. Fragment of Eetiolites Geinitzianus, Barr., natural size. From the 



Coniston Flags of Broughton Moor. 



20. The same, enlai'ged to show the punctation of the test. 



21. Fragment of B,. perlahis, Nich., natural size. From the Coniston Flags 



of Mosedale. 



22. Portion of the same, enlarged, to show the peculiar reticulation of the 



test. 



23. Fragment of Eastrites peregrintis, Barr., natural size. From the Coniston 



Flags of SkelgiU. 



24. The same, enlarged. The appearance in this figure of appendages attached 



to the apices of the cellules at right angles is simply produced by frag- 

 ments of another contiguous specimen. 



25. Fragment of E. Linnei, Barr., natural size. From the Coniston Flag.s 



ofMosedsle. 



26. The same, enlarged. 



27. Fragment of Graptolites lohiferus, M'Coy (var, exiguus, Mch.), natural 



size. From the Coniston Flags of Skelgill. 



28. The same, enlarged. 



29. Fragment of G. lohiferus, near the base, enlarged. From the tapper 



Llandeilo rocks of Dumfriesshire. 



30. Fragment of G. lohiferus, M'Coy, showing the cavities occupied by the 



polypites ; enlarged. From the Upper Llandeilo rocks of Dumiries- 

 shire. 



31. Fragment of the ordinary form of G. Sedgwickii, Portl., enlarged. 



From the Coniston Flags of Broughton Moor. In this specimen the 

 common canal is relatively wider and the cellules smaller than is the 

 case in ordinary examples. 



32. Fragment of G. Sedgwickii, Portl. (var. spinigerus, Nich.), enlarged. 



From the Coniston Flags of Mosedale. 



33. Fragment of G. Sedgwickii, Portl. (var. triangulatus, Harkn.), near the 



base ; natural size. From the Coniston Flags of Skelgill. 



34. The same, enlarged. 



