352 Scientific Proceedings, Royul Dublin Society. 



1874, when my work was finished, Dr. Hull appeared to agree 

 with my opinions ; but shortly afterwards when the memoir was 

 published he insisted on saying that the result of my work was 

 to prove the Lower Silurian age of all ; yet afterwards, when he 

 published his section, he suggested that some of them were pro- 

 bably Cambrians ; while now he has again changed his mind, and 

 declares that he " can have no hesitation in referring them" to 

 the Laurentians. 



In the Geological Survey Memoir, and also at page 21 of the 

 " Geology of Ireland," I have shown that these Connemara rocks 

 lie on an anticlinal curve, and thab they range both northward and 

 southward, in regular and similar sequences, from the lowest 

 exposed strata in the western portion of the Bennabeola hills ; 

 as represented in the Diagram, Plate XXX. 



Geneeal Section of the Connemara Anticlinal. 



North Side. South Side. 



Cambro-silukian. 



B 12. Groagh Patrich beds, with Lettermullen beds, with inhers of 



inliers of serpentine, steatite, limestone, liornblencle-rock, &c. 



limestone, and hornblende- (submetamorplaic.) 



rock. 

 'BW. Doolough beds, fossiliferous Hornhlendite and talcite series. 



in part. (Llandeilo), sub- 



metamorpliic in part. 



Arenig. 



B 10. Great micalite series, having Great micalite series, having in it 

 in it, above, inliers of horn- above, inliers of hornblende- 

 blende-rock, ophite, steatite, rock, ophite, steatite, &c. 

 &c. 



B 9. Lettermore quartzite series. Small qua/rtzite series. 



Cambrian. 



B 8. Kylemore series, containing Ballynahinch series, containing 



many limestones. many limestones. 



B 7. Middle micalite series. Middle micalite series. 



B 6. Great quartzite series. Great quartzite series. 



B 5. Small micalite series. Small micalite series. 



B 4. Ophiolite and dolomite series. Opkiolite and dolomite series. 



B 3. Quartzitic tnicalite series. Quartzitic micalite series. 



B 2. Streamstown limestone series. Streamstown limestone series. 



B 1. Lower micalite series. Lower micalite series. 



