164 WILLIAM HELLIER BAILY 
tubes of a gregarious Annelid, allied to Sabella (Jour. Geol. Soc. 
of Dublin, vol. viii. (1859), p.p. 116-118., figs. 1 and 2), appears 
to us to be scarcely definite enough to warrant its retention 
amongst the fossils of this formation. 
Figures and more detailed descriptions of these fossils are given 
in the Journal of the Geological Society of Dublin (loc. cit.), the 
Transactions of the Royal Irish Academy, vol. xxiii. (1858) ; 
in the Geological Magazine, 1865, p. 385, &c.; and in the 
Explanation to sheets 121 and 130 of the maps of the Geological 
Survey of Ireland ; a good series, including some of the figured 
Specimens, being contained in the Geological Survey Collection, 
Royal College of Science, Dublin. 
List OF CAaMBRIAN FossIzs. 
Plante or Hydrozoa. 
Oldhamia antiqua (forbes), Bray Head, Carrick Mountain, County 
Wicklow ; Howth, Co. Dublin. 
Hs radiata (Yorbes), Bray Head, Greystones, Co. Wicklow. 
Histioderma Hibernica (Kinahan), Bray Head, Carrick Mountain, 
Dublin. 
Arenicolites didymus (Salter) 1 Probably identical, Bray Head, 
i sparsus (Salter) § Carrick Mountain. 
Lower PaLta&ozoic Rocks, containing Caradoc-Bala species 
have been Observed at several places near Rathdrum, in the 
County of Wicklow: more particularly at Rathdrum Hill, the - 
Quarry near Rathdrum Bridge, and at Slieveroe. ‘The follow- 
ing is a list of the fossils collected by the Geological Survey in this 
district :—* 
[The prefixed asterisks are intended to represent the comparative 
abundance of the species. | 
ActTiInozoa : Corals. 
** Favosites fibrosus, branching and hemispherical varieties, 
Mo.uusca: Brachiopoda. 
Discina perrugata 4 
Leptiena Griffithiana, new species (Davidson). 
» . Sericea. | 
Orthis calligramma. 
»  eélegantula. 
Lingula brevis ? 
* Explanation to sheets 121 and 130 of the maps of the Geological Surrey of Ireland, 
p. 16. 
