THE OEOLOOi^i*. 



and especially Puntaracnis. This group consists of soft, argillaceous 

 sandstones and building stones (Goleugoed), shales, some calcareous 

 bands, hord, coarse grits, and quartzose, pebbly conglomerates. Thickness 

 2,000 to G,000 feet. 



Localities.— -Vs'^iUv niembers of (his gioup, aiid Iheir rclati(jns to the 

 overlying and subjacent rocks, are Vv-cU exhibited at iSToeth Griig; near 

 Llandover}^ S^ulh Wales. In Kadnorshire, Shropshire, and Hereford, 

 the upper member, or Fentamerus ohlongus zone, is alone present, and 

 is seen in some places to be unconformable to the Longmynd and 

 Caradoc rocks. The conglomerates of the west flank of the Malverns, 

 and the sandstones of May Hill and Huntly, Gloucestershire, are of 

 this age. 



CHARACTERISTIC FOSSILS OF THE LLAIsDOYERY ROCKS. 

 Trilohita. — Eucrinurus punctalus, Phaccps Stokesii. 



Brachiopoda. — llhynchonella angustifrons, Orthis virgata, O. reversa, Fentamerus 

 ]ens, P. uiidatus, P. oblongus, Lingula ci-umena,Strophomena pecten, Atrypa hemis- 



haerica, A. crassa, A. marginah's. 

 P Gasteropoda, — Holopella cancellata. 



Zoop)hyla. — Petraia subduplicata, P. elotigata, P. bina. 



FOSSILS OF THE LLANDOVERY ROCKS. 

 Planted. 



Fucoids in Malvern sandstone, Sil. p.1 06. 



ZOOPHYTA. 



Favositos Gotlilandicus, Lam. S. S, 682. Nebulipora. 



alveolaris, Man. 402. Falreocyhis porpita, Linn. sp. 



GloniophyllmQ pyramidalc, His. Ljcth . Petraia requisulcata, M Coy. P. F. 39. 



Heliolites intcrstinctus, Wahl. bina, Pliil. P. F. 4. Sil. 242. 



(Forites pi/riformis, Svst.) elongata, rhil P. F. 6. 



subtilis, Jir'Coy, P. F. 17. " subduplicata, jWCoy, P. F. 40. 



tubulatus, Lous. S. S. 687. Syringopora serpens, Gold/. S. S. 675. 



Halysites catenularius, L/inn, Sil. 685. Graptolithus priodon, Bronn. 



{CaUnipora e^charoides) [G. Ludensis, S. S. p. 694.) 



EcniNODERMATA. 



Pleurocystites Rugeri, Salt. Sil. p. 220. Crinoid stems, Sil. PL 10. f. 1. 



CRrSTACEA. 



{Eatomostrara—TrllohUcs) Lichas laxatus, J\r Cuij, S. F. 51. 



AciOaspis Briglitii, March. S. S. 658. Clieirurus bimucronatus, March, S. S. 

 Asaphiis latifrons, Fortl. (i. R. 292. 377. 



{Siifi/iua, Sa!i, r.) Phacops caudatus, Briinn. S. S. 65L 

 Euiu:i,-tus iJarriensis, jD/rch. S.S. 656. Downingio}. March. S. S. (555. 



(O'l'l'ii^liis ii!c-;..l(.iis, :U-Coy, sp. P.F.14;^. Stokcsii, Fdiv. S. S. 656. 

 CalyiiKMK' l'.lunienl)acbii,i}/-o»^.S.S.653. AVeavcri. Salt. Dec. 2, p. 7. 



I'lncviiiui iis puiK'iatus, Briinn. Sib 230. Proetus latifrons, M' Coy, S. F. 49. 



llluMiu.-^ Bowniani, Salt. G. S. 2, p. 889. Ptcrygotus spec. Sil. 106, 235. 



AXXELIDA. 



C(.i-nulitos sevpulavius, Schl. S. S. 627. Teutaculites ornatus, Soir. S. S. 628. 

 Icr.tac'uliU-.sanglicus, Salt. Sil. t. 1. f. 8. 



JiKYOZOA. 



' Ni.liilitcs favus, Salt. Sil. 20:]. Ptiloaictva laneoolata, Lons. S. S. 676. 



1 tiliMhctya dicluiluma, Vvrtl. (I. II. 889. .vcalpefhnu, Lri>:>-. S. S. 670. 



