﻿1/2 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 5, 



Bellerophon dilatatus, Sow. 



Orthoceras Barrandei, Salter. See descriptions, p. 177. PL.IX.fig. 19. 

 Lower Thrave (Yellowish Sandstone). 



Nearly all the fossils of Mulloch Quarry. The oval Terebratula 

 (H. angustifrons, M'Coy) mentioned in the last locality, very abun- 

 dant ; Atrypa hemisphcerica, Phacops Stokesii, &c. ; with the addi- 

 tion of 



Lichas laxatus, M'Coy. A Llandeilo-flag trilobite. Pl. IX. fig. 5. 

 Terebratula cuneata, Dalm. A Wenlock species. Pl. IX. fig. 11. 

 Orthis biforata, Schloth. sp. A common Silurian fossil, chiefly found 

 in the Lower Division. 



Saugh Hill (Sandstones). 

 Sandstone like that of Cong, Galway, Ireland, and with several of 

 the same fossils. 



Encrinurus punctatus, Wahl. sp., and its hypostome. Pl. IX. fig. 4. 

 Phacops Stokesii, M.-Edw. sp. 



Tentaculites ornatus, Sow. A variety with coarser intermediate striae 

 than usual ; and the rings too on the young part are more regular 

 than in Dudley specimens ; still it is probably only a variety. 

 Pl. IX. fig. 6. **** 



Petraia elongata, Phill. sp. ? Chiefly in the conglomerates. ***** 



Halysites catenulatus, Martini, sp. Also in the conglomerates. 



Favosites Jibrosus, Goldf. 



Heliolites inordinatus, Lonsd. sp. 



Atrypa hemisphcerica, Sow. The small ordinary variety. ***** 

 Terebratula serrata, M'Coy. ** 

 T. borealis, Schloth. 



Pentamerus oblongus, Sow. Only in the conglomerates, ***** 



Leptcena sericea, Sow. 



Strophomena, like S. euglypha, Dalm. 



Pileopsis {Nerita, Sil. Syst.) haliotis, Sow. sp. 



Drummuck (Shaly Beds). 

 Calymene Blumenbachii, Brong. Abundant ; the true species, which 



in North Wales is found in Lower Silurian strata. 

 Illcenus Bowmanni, Salter. 



Cheiimrus bimucronatus (Sil. Syst.). A large head and body-rings. 

 Bellerophon acutus, Sow. Pl. IX. fig. 18. *** 



dilatatus, Sow. 



bilobatus, Sow. ** 



— sp. like B. acutus, but with wide umbilicus. 



3. Orthoceratite and Graptolite Flagstones. 

 (No. 1 of the Sections and Map.) 



Piedmont Glen. 



Serpulites , sp. 



Graptolithus tenuis, Portlock. Pl. X. fig. 1 . ** 



Orthoceras politum, M'Coy. Seep. 151, and note. Pl.X. figs. 5,6. *** 



