Mr. W. Thompson's Additions to the Fauna of Ireland. 437 



being sometimes much elongated, and of similar breadth from 

 base to top, but is generally subpyramidal. Dr. Farran states 

 that it is always adherent to Modiolus vulgaris ; and is brought 

 up in the trawl-nets used in taking flat-fish. 



Annelida. 



Erpohdella tessulata, Miill. (sp.) ; Nephelis tess., Brightwell, Ann. 

 Nat. Hist. vol. ix. p. 13. pi. 1. f. 15-17. In a letter from the 

 Rev. Benj. J. Clarke, dated Tuam, Nov. 22, 1843, it is remarked — 

 " I have a living Nephelis tessulata with the young adhering ; I 

 took it in a river here last July with others of the same species, 

 and as this one contained ova, I kept it until the young were 

 born. They have not increased in size for the last two months, 

 and have been clinging to the unfortunate mother for three 

 months." In a subsequent letter it was mentioned that " the 

 parent died in March (after having been kept in a bottle of water 

 for nine months), and left her numerous progeny adhering in a 

 cluster to the side of the glass. They did not leave her body 

 until the hour of her death : they have increased very little in size 

 in the last four months." 



Piscicola geometra, Linn, (sp.) Lough Eaghish, county Monaghan, 

 and Lough Neagh, Mr. Hyndman. Mr. Templeton has described 

 and figured a new species from the latter locality in Loudon's 

 * Magazine of Natural History,' vol. ix. p. 236. f. 28, and 

 named it P. Perc(e. The specimens observed by Mr. Hjmdman 

 are the true P. geometra as distinguished from P. Percce. 



Clepsina hyalina, Miill. (sp.), Brightwell, Ann. Nat. Hist. vol. ix. 

 p. 15. pi. 1. f. 20. Ballydrain lake, &c. near Belfast, W. T. Lea- 

 mington, Warwickshire, W. T. 



" Lumbricus lineatus, Miill., Johnst. Mag. Nat. Hist. vol. viii. p. 259. 

 f. 36. Coast of Down, W. T." Dr. Johnston, — to whom a large 

 collection of Irish Annelides was submitted for being named and 

 described ; the localities noted were attached to the specimens. 



Cirratulus medusa, Johnst., Mag. Zool. and Bot. vol. ii. p. 71. pi. 3. 

 f. 7-12. Found under stones on the beach at Clew bay, co. Mayo, 

 July 1840, W. T. ; dredged in Dalkey sound, Dublin bay, R. Ball 

 and E. Forbes. 



Trophonia Goodsiri, Johnst., Ann. Nat. Hist. vol. iv. p. 371. pi. 11. 

 f. 1-10. 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 : Donaghadee, Dr. Drummond. 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 

 aculeata. 



" Terebella cirrhata, Mont., Linn. Trans, vol.xii. p. 342. pi. 12. f. 1. 

 Coast of Down, W. T." Dr. J. 



