164 
The Irish Natu7alut. August-September, 
of our National Museum who has at all times freely placed 
at my disposal his critical knowledge of our marine mollusca. 
I am also indebted to Miss A. L. Massy and Mr. G. P. Farran 
of the Irish Fisheries Office for useful notes and references, 
and to the Dublin Marine Biological Committee for material 
taken on its various dredging cruises. 
LIST OF THE PRINCIPAL BOOKS AND PAPERS RELATING 
TO THE OPISTHOBRANCH FAUNA OF COUNTY DUBLIN. 
Citations from these works are distinguished in the text of this paper 
by the contracted titles set out below on the right hand margin. 
Adams, Rev. B. W. : 
Marine jVtollusca of Counties of Dublin and Wicklow. Bvit. Assoc. 
Guide, Diil'lin, 1878 .. .. Adams '78. 
Aldkr, Joshua, and Hancock, Albany : 
Description of a new genus of Nudibranchiate Mollusca with some 
new Species of Eolis. Ann. Mag. Nat. Hist., xiii., pp. 161-66, 
1844 .. .. .. .. Aid. & Hanc. '44. 
A Monograph of the British Nudibranchiate Mollusca. Ray 
Socy., 1845-55 .. .. .. A. c1' H. Monograph. 
Beaumont, W. I. : 
Opisthobranchiate Mollusca of Valentia Harbour. Proc. E. I. 
Acad. {3) Vol. v., pp. 832-54, 1900 .. Beaumont, 1900. 
Colgan, Nathaniel : 
New Marine Mollusca for Co. Dublin. Ir. Nat., xv. p. 172, 1906. 
Colgan '06, 
Marine Mollusca of Lambay. Ir. Nat. \vi. pp. 32-42, 1907 
Colgan '07. 
Some further Additions to the Marine Mollusca of Co. Dublin. 
Ir. Nat. xvi., p. 160, 1907.. .. .. Colgan '07A. 
■ Dublin Marine Biological Committee. General Account of Dredg- 
ing Operations, 1907, with special Notes on Mollusca. Ir. Nat. 
xvii. , pp. 105-114, 1908 . . . . . . Colgan '08. 
Contributions towards a Revision of the genus Lomanotus. Ann. 
Mag. Nat. Hist. (8) Vol. ii., pp. 205 and 392, 1908. Colgan 'o8b. 
Dublin Marine Biological Committee. Report for 1908. Ir. Nat. 
xviii. , pp. 166-177, 1909 .. .. .. Colgan '09. 
Notes on Locomotion and the use of Slime Threads in the Marine 
Mollusca. Ann. Mag. Nat. Hist. (8), Vol. iii. pp. 354-362^ 
1909 . . . . . . . . . . Colgan '09A. 
Notes on the Development of Actaeonia. Ir. Nat. xxi,, pp. 225-31^ 
1912 , , , . , , , . , , Colgan '12, 
