342 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. [Feb. 26, 



On the Hallaig shore the Jamesoni-heds are underlain, by soft, 

 dark-coloured, micaceous shales, with Ammonites armatus ; though 

 the lithological features are sufficiently distinct, yet the community 

 of species is so great that there is not much value in detaching the 

 beds with A. armatus from those with A. Jamesoni. 



On the south-east shore of Church-Town Bay, Eaasay, the armatus 

 shales are altered by porphyritic syenite, which intrudes and over- 

 lies them. Ammonites tar deer escens, Pinna folium, Pholadomya 

 decorata, and Avicula novemcoslce are the only fossils noted. 



List of Fossils from the Armatus- and Jamcsom-beds of Pabba 

 and Eaasay. 



Ammonites Jamesoni. Pabba, Wright, R. T. Hallaig Road, Eaasay, 



R. T. 



■ armatus. Eaasay, R. T. 



- polymorpbus. Eaasay, R. T. 



■ brevispina. Pabba, Wright. Eaasay, R. T. 



■ tardecrescens. Eaasay, R. T. 



Davoei, Sow. Pabba, Wright. 



Belemnites elongatus. Pabba, Wright. Eaasay, R. T. 



paxillosus. Pabba, Wright. 



• elegans. Eaasay, R. T. 



■ breviformis. Pabba, Wright. 



clavatus. Pabba, R. T. 



Chemnitzia Blainvillei, Benz. Pabba, R. T. Eaasay, R. T. 

 Ceritkium Slatteri. Tate. Eaasay, R. T. 



Tectaria imbricata, Sow. Pabba, Wright & R. T. Eaasay, R. T. 

 Pboladomya decorata. Pabba, Eaasay, R. T. 



arabigua. Pabba, Wright. Eaasay, R. T. 



Pleurornya ovata, Rom. Pabba, R. T. (? P. unioides, Wright). Eaasay, 



R. T. 



'scotica, Wright. Pabba. 



Unicardium Iantbe, R' Orb. Pabba, ? U. cardioides, Wright. Eaasay, 



7? 7 1 

 Pimia folium, Y. $ B. Pabba, Wright & R. T. Eaasay, R. T. 

 Mytilus scalprum, Sow. Pabba, Wright & R. T. Eaasay, R. T. 



numismalis. Eaasay, R. T. 



Leda Zieteni, Brauns. Eaasay, R. T. 



■ galatbea, B' Orb. Eaasay, R. T. 



Cardinia attenuata, Stutch. Eaasay, R. T. 



Avicula novemcostse, Br. Pabba, R. T. Eaasay, R. T. 



Lima Hermanni, Ziet. Pabba, Wright & R. T. 



■ eucbaris, B' Orb. Pabba, R. T., ? L. gigantea, Wright. 



Limea acuticosta, Goldfuss. Pabba, Wright & R. T. Eaasay, R. T. 

 Inoceramus ventricosus, Sow. Pabba, Wright. Eaasay, R. T. 

 Pecten aequivalvis, Sow. Pabba, Wright & R. T. Eaasay, R. T. 



liasiuus, Nyst. Pabba, R. T. 



Plicatula spiuosa, Sow. Pabba, Wright & R. T. 

 Gervillia Maccullocbii, Wright. Pabba, Wright. 

 Grypba^a cymbium, Lamarck. Pabba, Wright & R. T. 



obliquata, Sow. Pabba, Wright. Eaasay, R. T. 



Hippopodium ponderosum, Sow. Pabba, R. T. Eaasay, R. T, 



Astarte striatosulcata, Rom. Pabba, R. T. 



Arcomya vetusta, Phil. sp. Pabba, R. T. 



Cuculltea Miinsteri, Goldfuss. Eaasay, R. T. 



Cardium truncatum, Soiv. Eaasay, R. T. 



Cardita multicosta, Ph. Eaasay, R. T. 



Ebyncbonella tetrabedra, Sow. Pabba, Wright & R. T. Eaasay, R. T. 



