Mr. W. Thompson's Additions to the Fauna of Ireland. 435 



Ascidia canina, Miill., Zool. Dan. vol.ii. p. 19. t. 55. f. 1 — 6. (Phal- 

 lusia, Sav.) Strangford lough ; Clew bay (co. Mayo), W. T. &c. 



Ascidia communis, Forbes MSS. Clew bay, E. Forbes, &c. 



Amaroucium jjroli/erum, Edw., Ascid. Compos, p. 67. pi. 1. f. 3, and 

 pi. 3. f. 2. Belfast bay, W. T. 



LeptocUnum gelatinosum, Edw., Asc. Comp, p. 83. pi. 8. f. 1. On the 

 roots of Laminarice in Belfast bay, W. T. 



LeptocUnum maculosmn, Edw., Asc. Comp. p. 81. pi. 8. f. 2, On the 

 roots of LaminaricB in Belfast bay and north of Ireland generally 

 — our most common LeptocUnum, W. T. 



LeptocUnum asperum, Edw., Asc. Comp. p. 82. pi. 8. f. 3. With 

 last. 



LeptocUnum durum, Edw., Asc. Comp. p. 82. pi. 8. f. 4. Dredged 

 in Strangford lough, Mr. Hyndman and W. T. 



BotryUus gemmeus, Sav., Edw. Asc. Comp. p. 89. pi. 6. f. 5. Ad- 

 hering to Fuci dredged in Belfast bay by Edmund Getty, Esq. 



BotryUus bivittatus, Edw., Asc. Comp. p. 92. pi. 6. f. 7.* With last. 



CRUSTACEA. 



Alauna rostrata, Goodsir, Edin. PhU. Journ. vol. xxxiv. p. 130, pi. 4 ? 

 (Jan. 1843). Taken at Newcastle, county Down, August 1836, 

 W. T. 



Cuma trispinosa, Goodsir, Edin. Phil. Journ. vol. xxxiv. p. 129. pi. 3. 

 f. 1. ? Portaferry, Strangford lough, summer of 1838, Robert 

 Patterson. 



Proto pedatum, Miill. (sp.), Zool. Dan. ; Leptomera jjedata, Edw., 

 Hist. Crust, vol. iii. p. 109. Among Algce dredged at Bangor, 

 county Down, 1834, Mr. Hyndman and W. T. 



Arcturus longicornis , Sowerby (sp.), Brit. Misc. pi. 10. Specimens 

 from Belfast bay are in the Ordnance Museum, and from Dublin 

 bay in the Museum of the Royal Dublin Society. 



Spheroma rugicauda, Leach, Linn. Trans, vol. xi. p. 369 ? Coast of 

 Down, W. T. 



Cirolana Cranchii, Leach. Obtained in Belfast bay by the Ordnance 

 collectors and by Mr. Hyndman, who brought me several specimens 

 taken by him on the common skate (Raia Batis) . Specimens from 

 Dublin bay are in the museum of the Royal Dublin Society. 

 C. Cranchii has been sent me from Portpatrick, Scotland. 



Cecrops LatreiUii, Leach. Examples of this species found on a sun- 

 fish (Orthagoriscus Mola) at Kinsale, county Cork, in August last 

 by Dr. Geo. J. Allman, have been kindly sent to me by that gen- 

 tleman. 



Lerneonema moniUaris, Edw., Hist. Crust, vol. iii. p. 525. pi. 41. f, 5. 

 This species has been favoured me by Mr. R. Ball, who procured 

 specimens adhering to the sprat (Clupea Sprattus) at Youghal. 



* In concluding the Mollusca, two species may be referred to as noticed 

 in a Report on the Invertebrata of Ireland, published in the Transactions 

 of the British Association for 1843. They axe Peracle Fleminyii, Forbes 

 {Fusus retroversus, Flem.), and Amphipeplea glutinosa. 



