234 Guide to Belfast. 



Hincksii : C. i?itegra ; C. angHlata ; Campauulina ttifrita, 

 described by Hincks from a drawing supplied by Wyville 

 Thomson, who found it very abundant on Zostera at 

 Holywood, Belfast Lough; Operciilarella lacerata ; Lafo'ea 

 parvi/Ia, described by Hincks from a specimen on a fragment 

 of Nitophyllmn from the north of Ireland ; Halecium miiri- 

 catiun ; Se?-tularia filicida ; S. a/press///a ; T/nn'am thiiia ; 

 T. articulata ; Aglaophenia pluma : A. 7nyriophxIlum ; 

 F/iiffintaria catharina ; P. similis ; P. frHtesce?is. 



The freshwater Hydroids, Hydra vulgaris and //. fiisca, 

 have been recorded from the north of Ireland. 



Very few Hydroid Medusas have been taken on the N.E. 

 coast of Ireland since the days when Prof Forbes, iVlessrs. 

 Hyndman, Patterson, and Thompson collected in this 

 locality. An account of their discoveries is given in Forbes' 

 Alonograph of the British Naked-eyed MediiscB, and in 

 Thompson's Natural History of Prlaud, vol. iv. Since the 

 publication of this volume, a supposed new species of Thau- 

 mantias (Thaumantias Pattejsonii) h.is been descrilied by 

 J. R. Greene^ from specimens taken in Belfast docks, but 

 it is referred doubtfully by Haeckel to Tiaropsis multicirrata 

 Sars ; and a supposed new species of Turris ( Tiirris con- 

 stricta) lias been described by Patterson - from specimens 

 obtained in Strangford Lough. 



A few Siphonophores are occasionally found on the 

 British coasts, principally after storms, and examples of the 

 gentxa. Dip hyes., Velella, and Agalma have been recorded 

 from the N.E. coast of Ireland. 



Scyphomedusae. — The common Jelly-fish (Aurelia 

 aurita) and specimens of Cyatiea are sometimes abundant 

 on the shores of Belfast Though ; a few other species of 

 Scyphomedusa; have occasionally been observed. 



Actinozoa. — This group contains the Sea Anemones 

 and the Corals; the former may often be seen adhering to 

 rocks, sea-weeds, etc., at low tide. 



' J. R. Greene — On the Acalephse of the Dublin Coast, with Des- 

 criptions of Seven New Naked-eyed forms. Nat. Hist. Rev., iv, 1857, 

 Proc, pp. 242-250. 



2 R. PATrERSON. — On a New Naked-eyed Medusa. Proc. Dublin Univ. 

 Zool. and Bot. Assoc, i, 1859, pp. 279-281. 



