'44 



MR. F. R. C. EEED ON THE LOWER PALEOZOIC [NoV. 1 899, 



The characteristic feature of the Tramore Limestones and Eaheen 

 Bhales is the abundance and variety of the trilobites. They are 

 by far the commonest fossils, and their vertical distribution is also 

 of stratigraphical importance. The brachiopoda are not numerous, 

 and the scarcity of mollusca and actinozoa is most noticeable. 



An important feature is the occurrence in these beds of several 

 peculiar genera or species which are extremely rare or unknown 

 from other British localities. Such are Ampliion^ Megalaspis, 

 Tramoria, Poramhonites, Coscinium; and the species of Ampyx^ 

 Cyhele, Barrandia, Acidaspis, etc. A few of the forms occur in 

 Tyrone or in the Balcletchie Beds. The following species 

 have not been found elsewhere in the British Isles: — 



Acidaspis Jamesii, Salter. 

 Amphiim henevolens, Salter. 



paicper, Salter. 



Airvpyx cf. Volborthi, Schmidt. 



cf. PortlocJci, Barr. 



Asaphus Haughtoni, sp. nov. 

 Barrandia Portlockii, Salt. 

 Cyhele cf. hellatula, Dalm. 



McHenryi, sp. nov. 



cf. rex, Nieszk. 



■ sexUdierculata, sp. nov. 



tmmorensis, Reed. 



E'ncnnurus fcdlax, sp. nov. 

 Illcenus Bailyi, Salt. 



JDavisi var. pseudolmbatits 



nov. 

 — — cf. Dalmani, Volb. 



Phacops Jamesii, Portl. 



Bailyi, Salt. 



Salteria involuta, Salt. 

 Tramoria punctata, gen. et sp. nov. 

 Trinucleus Jiihernimis, Reed. 

 Remopleurides PortlocJci, sp. nov. 



Salteri, sp. nov. 



tuherculatus, sp. nov. 



Beyrichia affinis, Jones. 

 Orthisina cf. squamata, Pahl. 

 Poramhonites inter cedens var. filosa 



(M'Coy). 

 Hyollthes cf. striatum, Eichw. 

 Coscinium cf. proavurn., Eichw. 

 Glyptocystis cf. pennigera, Eichw. 

 Monticidipora (JDiplotrypa) petropoli- 



tana. Band. 



Trinucleus hibernicus, Reed. 



The specimens attributed to Tr. seticornis^ His., from the fo.ssili- 

 ferous localities on the Waterford coast, and thus recorded in the 

 Survey Memoir, etc., are found to belong to Tr. hihernicus.^ Tr. 

 seticornis has not so far been observed by me in any collection 

 from Waterford. Tr. hibernicus is extremely abundant at Newtown 

 Cove, and has also been found on the same horizon at Dunabrattiu 

 and in the Eaheen Shales at Newtown Head. There is a fine 

 specimen of a complete individual from Dunabrattin in the Geological 

 Survey Collection, from which the following details may be added 

 to the description of the species previously published. 



The genal spines are very long and straight, and extend parallel 

 to each other behind the pygidium for a distance nearly equal to 

 that of the whole trilobite, much resembling those in Tr. BucJdandi, 

 Barr. 



There are six segments (as usual) in the thorax with flattened, 

 straight-pointed pleurae. The axis is about one-quarter the whole 

 width of the thorax. Each pleura is divided diagonally into two 

 pnrts, the anterior portion being flattened and widening towards the 

 point, and the posterior portion elevated and narrowing towards 



1 Geol. Mag. 1895, p. 62. 



