Vol. 52.] FROM THE CARBONIFEROUS LIMESTONE. 451 



Fig. 5. A specimen consisting of only two corallites, viewed laterally. X 3 dia- 

 meters. River Hodder. 



6. The cast of a specimen consisting of only two corallites, showing in 



the one half the solid infilling of the calice with the mural pores, and 

 in the other the casts of the outer wall and the longitudinal ridges. 

 X5 diameters. From decayed shale in the Lower Culm Measures 

 at Hannaford Quarry near Barnstaple. 



7. A specimen consisting of but a single corallite, quite free from the 



matrix. X 5 diameters. River Hodder. 



8. A cast of another single specimen, showing the thickness of the wall at 



the base and the form of the interior of the calice. X 5 diameters. 

 Lower Culm Measures, Hannaford Quarry. 



9. A horizontal section of a specimen with four corallites, showing the- 



mural pores between contiguous corallites and those opening to the 

 exterior. X 5 diameters. From the River Hodder. 



10. A transverse section of a single corallite near the base, showing the 



thickness of the wall and the mural pores or canals. X 10 diameters. 

 River Hodder. 



11. A transverse section of a corallite-wall near the summit. x5 dia- 



meters. 



12. A portion of the inner surface of a calice, showing the mural pores. 



XlO diameters. 



13. A portion of the under surface of a corallite which has been rubbed 



down, showing the mural pores. X 10 diameters. River Hodder. 



14. Portion of the outer surface, showing the longitudinal ridges. X 10 



diameters. 



15. Portion of a translucent microscopic section of the wall showing the 



fibro-crystalline structure and one of the mural pores. X75 dia- 

 meters. 



16. 16 a. Palceacis cuneiformis, M.-Edw. Front and side view of a speci- 



men with four corallites. Natural size. From the Subcarboniferous 

 (St. Louis) Group, Spergen Hill, Indiana. 



17. 17 a. Palceacis obtusa, Meek & Worthen, sp. Front and side view of a 



specimen with five calices. Natural size. From the Subcarboniferous 

 Limestone, Keokuk, Iowa. 



18. The same. Front view of a small specimen with six calices. Natural 



size. From the Carboniferous Limestone of Hook Point, Wexford. 

 The specimen belongs to the Jermyn Street Museum. 

 18 a. The same. A vertical median section of the same specimen, showing 

 three corallites, now filled with the rock-matrix and the mural pores, 

 and canals traversing the walls. X 3 diameters. 



Discussion. 



Mr. Strahan remarked on the richness of Halkin Mountain in 

 fossils, and suggested that it would be advisable to fix more exactly 

 than seemed to have been done the locality and horizon in the lime- 

 stone of the annelid described. He congratulated Miss Eeid on the 

 discovery of this unusually perfect specimen. 



Prof. T. Rupert Jones also spoke. 



The Author replied that he would endeavour to obtain more 

 definite particulars as to the exact horizon of Eunicites, and thanked 

 the Fellows for the reception accorded to his paper. 



