Mr. W. Thompson's Additions to the Fauna of Ireland. 357 



2. Alecto major, Johnst. Brit. Zooph. p. 281, 2nd edit. 

 Adherent to old bivalve shells dredged outside the entrance of 

 Belfast bay, from the depth of twenty-five to thirty-five fathoms, in 

 July 1848, and sent to me by Mr. Hyndman. 



3. Alecto dilatans, Jolinst. Brit. Zooph. p. 281. 

 With last. I had previously noted this species or form — for I do 

 not feel altogether satisfied respecting the specific distinctness of 

 A. major and ^. dilatans — as observed with other deep-water zoo- 

 phytes on a stone dredged from forty fathoms off Whitehead, county 

 of Antrim. Its three branches render this specimen more elegant 

 than any of those figured by Johnston. 



4. Lepralia simplex, Johnst. B. Z. p. 305. 



I find this very fine and well-marked species on old bivalve shells, 

 Modiola vulgaris, Pecten opercularis, &c., dredged on the same 

 occasion as Alecto major. 



5. Lepralia Hyndmanni, Johnst. ? B. Z. p. 306. 

 As last. Marked with doubt on account of the specimens being 

 much worn. 



6. Lepralia annulata, Fabr. (sp.), Johnst. B. Z. p. 313. 

 As last. 



7. Lepralia Peachii, Johnst. B, Z. p. 315. 

 As last. 



8. Lepralia innominafa, var. ? Couch (description, not figure), 

 Johnst. B. Z. p. 319. 

 As last. 



9. Lepralia Ballii, Johnst. B. Z. p. 321. 

 As last. A very distinct species. 



10. Lepralia trispinosa, Johnst. ? 

 As last. Agreeing with the description (Brit. Zooph. p. 324, 2nd 

 edit.) better than with the figure, in the aperture being " small and 

 circular," &c. 



11. Lepralia coccinea, Abilgaard in Miill. Zool. Dan. vol. iv. p. 30. 



t. 146. f. 1, 2 ; Johnst. Brit. Zooph. p. 322. pi. 57. f. 2, 3, 



2nd edit. 



Adherent to a stone dredged from five fathoms at Donaghadee in 

 Aug. 1848. This species is distinct from the L. coccinea of the 1st 

 edit. British Zoophytes, and is called L. unicornis in the 2nd edit. 

 I notice it here, as the variety /3. only (L. appensa), is recognized as 

 Irish in the last-named work. 



