314 Mr. W. Thompson's Contributions to the Fauna of Ireland^ 



r future decision than to be altogether silent on the subject. A co- 

 loured drawing of Mr. Alder's specimen being kindly transmitted to 

 me, it was found to represent mine exactly, except in the very trivial 

 difference of having a few minute white spots on the sides instead of 

 being of a uniform colour. Specimens of A. depilans, which I have 

 often taken (but never of so small a size), differ in being occasionally 

 spotted as well as plain. But I have never met with this species of the 

 same form as A. nexa, of its fine deep-red colour, nor having any 

 black border to the mantle, &c. ; nor has Dr. J. L. Drummond ever 

 done so, though great numbers came under his examination when 

 dredging at Donaghadee, on the coast of Down, in the summer of 

 1843. 



Hab. Torbay, England ; Belfast bay, Ireland. 



J Acteon viridis, Mont, (sp.)^ Quatrefages, Ann. Sci. Nat., March 

 1844. Aplysia viridis , Mont., Linn. Trans, vol. vii. 



With a letter, dated from Glandore House (county Cork), Aug. 

 23, 1844, Professor AUman sent me a small phial containing speci- 

 mens of this Acteon, remarking that he had just taken it there in con- 

 siderable numbers. He subsequently, at the meeting of the British 

 Association at York, gave an admirable account of the anatomy of 

 the species, illustrated by drawings of remarkable beauty, executed by 

 his sister. Miss Allman. In consequence of the Acteon being thus 

 brought forward, this brief note might be cancelled ; but as the spe- 

 cies had previously a place in my " Additions," it is retained with 

 this explanation. About the same time the Rev. Mr. Landsborough 

 informed me that he had taken this species on the coast of Arran, 

 Frith of Clyde. 



f Bulla producta, Brown, lUus. Conch, p. 57. pi. 19. figs. 15, 16; 

 2nd edit.— pL 38. f. 15, 16 ; 1st edit. 



Among shell-sand collected at Bundoran, on the western coast, by 

 Mrs. W. J. Hancock in 1840, and sent to Mr. Hyndman, was a spe- 

 cimen of this Bulla. Capt. Brown notices it merely as " found at 

 Dunbar by General Bingham." 



Utriculus, genus. Brown, Illus. Conch, pp. 58, 59, pi. 19 ; 2nd 

 edit.— pi. 38; 1st edit. 



Having lately left with Mr. Alder a number of Bullcc (obtained with 

 the last species at Bundoran) which he wished to examine critically, he 

 reported on them as follows : — " On examining the fine suite of Bulla 

 hyalina, I think I make out three of Brown's species of Utriculus : 

 17. candidus being the full-grown shell ; U. pellucidus the half-grown ; 

 and U. minutus the youngest state of B. hyalina. At least these 

 answer very well to his figures and descriptions." The last two are 

 noticed by Capt. Brown as from Dunbar only, where they were found 

 by General Bingham, as was U, candidus also ; but this is mentioned 

 as having been subsequently procured at Holy Island, off the coast 

 of Northumberland, by the author himself. 



