166 
The liish tJaiuf^list. August-September, 
ThoiMpson William — continued. 
Contributions towards a knowledge oi the Mollusca NudilManchia 
and Mollusca Tunicata oi" Ireland. Ann. Mag. Nat. Hist, v., 
pp. 84-102, 1840 . . . . . . Thompson '40A. 
Additions to the h'auna of Ireland. Ann. Mag. Nat. Hist, xiii., 
pp 430-440, 1844 . . . . . . Thompson '44. 
Additions to the Fauna of Ireland. Ann. Mag. Nat. Hist, xv., 
pp. 308^322, 1845 .. .. Thompson '45. « 
TuKToN, William : 
Irish Conchology, classically arranged. Dublin Examiner, \., 
p. 230, 1816 .. .. .. .. Turton '16. 
Walpole, William White : 
Catalogue of Marine Mollusca inhabiting the Dublin Coast. Zoologist 
xi., pp. 4101-4106, 1855 .. .. .. Walpole '53. 
W^KroHT, E. p. : 
Notes on the Irish Nudibranchiata. Nat. Hist. Review, vi., pp- 
86^88,1859 .. .. .. Wright '5«,), 
Order— OPISTHOBRANCHIATA. 
Sub-order— TECTIBRANCHIATA. 
Actaeon tornatilis (Linne). 
Shells frequent in drift and occasional in dredgings up 
to 17 f. ; seldom taken in a living state within the area. 
Largest shell, 25 mm. long. 
Tornatina obtusa (Montagu). 
Utriculus obtusus. 
Shells occasional in dredgings and locally abundant in 
drift, as on the North Bull where 90 were taken in a single 
gathering in 1906 ; living specimens occasional between 
tide-marks. Largest shell, 4-5 mm. long. 
Var. lajonkaireana Basterot. — Occasional on the North 
Bull, 1905-06 :iV.C. 
T. mammillata (Philippi). 
Utriculus mammillatus. 
Rare ; shells only. Tliree shells taken in 13 f. off the 
Muglins : Colgan, '07 A. One shell in drift on N. Bull, 1907, 
and 12 in 16 ^ off Muglins, 1908 : N£. Largest, 2-5 mm. 
long. 
