Mr. W. Thompson's Additions to the Fauna of Ireland. 431 



Mr. Alder dredged two or three specimens of this species iu Dublin 



bay at the same time with the last. 

 Polycera cristata. Alder, Ann. Nat. Hist. vol. vi. p. 340. pi. 9. f. 10, 



11. Obtained with the preceding two species : — common. 

 Tritonia plebeia, Johnst., Ann. Nat. Hist. vol. i. p. 115. pi. 3. f. 3,4. 



A specimen was taken by dredging in Cork harbour, August 1843 : 



R. Ball and E. Forbes. 

 Tritonia arhorescens, Cuv. Several specimens of a small size were 



taken by Mr. Alder and Dr. Farran at Malahide. Tritonia lactea, 



Ann. Nat. Hist. vol. v. p. 88. pi. 2. f. 3, is considered by Mr. Alder 



a variety of T. arborescens. 

 Melibcea coronata, Johnst., Ann. Nat. Hist. vol. i. p. 117. pi. 3. f. 5 



— 8. Obtained at Glandore bay, county Cork, in August 1842, 



by Dr. George J. Allman, and subsequently in Dublin bay by Mr. 



Alder, who is now of opinion that the Melib. ornata, Ann. Nat. 



Hist. vol. ix. p. 33, is a variety of M. coronata. 

 EoUs coronata, Forbes, Report Brit. Assoc. Meeting 1839, p. 647. 



Procured with the last at Glandore bay : found to be common at 



Malahide by Mr. Alder and Dr. Farran. 

 EoUs pallida. Aid. and Hanc, Ann. Nat. Hist. vol. ix. p. 35. A single 



example taken at Malahide with the preceding. 



Order Inferobranchiata. 

 Pleurobranchus membranaceiis , Mont, (sp.); Lamellariamemb., Mont., 

 Linn. Trans, vol. xi. p. 184. pi. 12. f. 3. Mr. John Humphreys 

 of Cork has informed me that a specimen occurred to Mr. Beevor 

 and himself when dredging in the harbour there last summer : 

 " the animal was large, about 2 inches in length, and the sheU a 

 very good one " — the species had not before been met with by 

 Mr. Humphreys. 



Order Tectibranchiata. 



Bulla diaphana, Turt., Conch. Diet. p. 22 ; Diaphana pellucida. 

 Brown's lUust. 1st ed. ? Two specimens have been taken by Mr. 

 Hyndman and myself when dredging in Strangford lough, and the 

 species has been found by Mr. T. W. "Warren at Portmarnock, on 

 the Dubhn coast. 



Bulla hyalina, Turt., Loudon's Mag. of Nat. Hist. vol. vii. p. 353. 

 Obtained at Portmarnock by Mr. Warren ; and ui shell-sand col- 

 lected at Bundoran and Ballysodare on the western coast by Mrs. 

 Hancock. 



Bulla pectinata, Dillw. ; B. scabra, MiilL, Zool. Dan, ; B. angustata, 

 Phil. ; B. catenulifcra. Scaphander catenata. Leach. All these 

 names, according to Mr. Aider, refer to the same species : it has 

 been found at Portmarnock by Mr. Warren, and at Bundoran (co. 

 Donegal) by Mrs. Hancock. Mr. Humphreys of Cork notices it 

 under Leach's name as procured by him there in the stomach of a 

 sole (^Solea vitlffaris). 



Bullaa punctata, Ada.ms(sTp.) ; Turt., Loudon's Mag. Nat. Hist. vol. vii. 

 p. 353. Obtained from three localities on the western coast — Mil- 

 town Malbay (W. H. Harvey), Kilkee in the co. Clare, and Bun- 



