POLYl'ODA. 429 



Genus Trophonia. 



T. Goodsiri, Johnst. 



Dredged in Strangford Lough, near Portaferry, July, 1838, W. T. The 

 specimens from which the original description was drawn up, were taken 

 in June, 1839, at the Orkneys, by Messrs. Forbes and Goodsir. Donagh- 

 adee. Dr. Drummond. In 20 fathoms, Belfast Bay, 1847, Mr. Hyndman. 

 The Irish specimens are much smaller than those described by Dr. 

 Johnston, but the bristles on every part of the body are considerably 

 longer in proportion to the size of the animal than in those from Orkney ; 

 they are finely iridescent, like the bristles of the Aphrodita aculeafa. 



ORDER II.— POLYPODA. 

 TRIBE SERPULINA. 



Genus Pectin.aRIA. 



P. helgica, Lam. 



North of Ireland ; not uncommon ; fed upon by flounders, &:c., W. T. 

 A tube di-edged from about 8 fathoms in Strangford Lough, July, 1838, 

 W. T. 



This is the size of the fuU-groAvn Dentalium entalis, and of similar 

 curvature, but tapers more gracefully from the broad to the fine ex- 

 tremity. 



Donovan, in figuring the " straight-tubed Sabella" {S. tuhifonnis, vol. 

 iv. pi. 133), remarked that the »S'. (j ran id at a, Linn., from its curvature was 

 probably distinct, and consequently he adopted Pennant's name for the 

 straight one. Penn. figures it quite straight,* as well as Donovan — the 

 latter had never seen it curved. Dr. Drummond, who has often taken 

 the Ainph. aiiricoind, never saw its tube otherwise than straight. A 

 specimen of the curved form, of small size, was dredged from 50 fathoms, 

 off South Kock, Co. Down, in 1843, by Mr. Hyndman. Size of my speci- 

 men, length l^ inches ; diameter at broader extremity l-6th of an inch ; 

 at narrower 1-1 6th of an inch. 



Genus Sabellaria. 

 S. alveolata, Linn. 

 Common in some parts of Belfast Bay, between tide-marks, W. T. 

 " Cork and Youghal Harbours " (Cork Fauna). 



S. crussissinui, Penn. 

 North of Ireland, Mr. Tcmpleton. 



Genus Terebella. 

 7'. conchilerja, Pall. 



Belfast Bay, Strangford Lough, and coast of Down, Mr. Hyndman 

 and W. T. Bangor, Dr. Drummond. 



* He describes it " bent." 



