50 



Mr. C. Lapworth on the Geological 



Moffat district. They break up very naturally into two mam 

 divisions, each with several subordinate zones*. 



In the deepest zones of the Lower Birkhill we meet with 



Diplograptus acuminatus, Kick. 



vesiculosus, Nich. 



modestus, Lapw. 



Climacograptus normalis, Lapw. 



Climacograptus innotatus, Nich. 

 Monograptus tenuis, Portl. 

 attenuatus, Hopk. 



Its highest [gregarius] zone is crowded with 



Diplograptus modestus, Lapiv. 



physophora, Nich. 



folium, His. 



tamariscus, Nich. 



Climacograptus normalis, Lapiv. 



rectangularis, 31' Coy. 



Monograptus tenuis, Portl. 



attenuatus, Hopk. 



spiralis, Gein. 



Monograptus argutus, Lapw. 



cyphus, Lapiv. 



Sandersoni, Lapiv. 



concinnus, Lapiv. 



lobiferus, M l Coy. 



triangulatus, Harkn. 



leptotheca, Lapiv. 



Rastrites peregrinus, Barr. 



The Upper Birkhill beds afford 



Diplograptus tamariscus, Nich. 



sinuatus, Nich. 



Hughesi, Nich. 



palmeus, Barr. 



Climacograptus normalis, Lapw. 



tectus ? Barr. 



Retiolites perlatus, Nich. 

 Monograptus runcinatus, Lapiv. 



intermedins, Can: 



concinnus, Lapw. 



Halli, Barr. 



Monograptus tenuis, Portl. 



attenuatus, Hopk. 



spiralis, Geinitz. 



lobiferus, M i Coy. 



Clingani, Can: 



Sedgwicki, Portl. 



gregarius, Lapw. 



Hisingeri, Carr. 



Rastrites peregrinus, Barr. 



fugax, Barr. 



distans, Lapw. 



The Birkhill beds are succeeded by the vast series of grits, 

 flagstones, and shales which I have denominated the Gala 

 group f. To this group properly belong also the Hawick 

 rocks, which are distinctly inferior to the Riccarton or Wen- 

 lock strata of Kirkcudbright and Roxburgh. The Rhabdo- 

 phora I have collected from the Gala rocks of the Eastern 

 districts include 



Climacograptus normalis, Lapw. 

 Diplograptus palmeus, Barr. 

 Retiolites obesus, Lapw. 



Geinitzianus, Barr. 



Rastrites maximus, Carr. 



distans, Lapiv. 



Monograptus runcinatus, Laj»v. 



concinnus, Lapiv. 



Sedgwicki, Portl. 



Becki, Barr. 



Salteri, Geinitz. 



Monograptus Hisingeri, Can: 



Halli, Barr. 



turriculatus, Ban: 



exiguus, Nich. 



galaensis, Lapw. 



Barrandei, Suess. 



crispus, Lapw. 



priodon, Bronn. 



■ spiralis, His. 



Cyrtograptus Grayre, Lapw. 



* Lapworth, Quart. Journ. Geol. Soc. 1878, p. 328 &c. 

 t Lapworth, Geological Magazine, 1870, p. 204. 



