850 Proceedings of the Royal Irish Academy. 



Genus — Lamellidoeis. 



Lamellidoris bilamellata (Linn.). 



Boris {Lamellidoris) bilamellata, A. & H. 



Very abundant on a limited area of one of the hulks beached 

 in 1896 ; none found on the other. In 1895 it was found once 

 on the shore near Knightstown. 



Lamellidoris aspera, A. & H. 



Boris {Lamellidoris) aspera, A. & H. 



Not at all common in Valencia Harbour. Dredged on 

 Ascidian ground on one occasion each year ; and found once on 

 the shore of Church Island. 



Lamellidoris (sp. ?). 



A small Lamellidoris, attaining a length of 6 mm., was 

 frequently found adhering to the under sides of stones on the 

 shore, and to Pecten and other shells dredged in the harbour. 

 We failed to identify it satisfactorily with any of Alder 

 and Hancock's species. In most of its external features it 

 agreed best with L. pusilla, but the tubercles of the mantle 

 were more clavate, and were decidedly spiculose. In these 

 points it agreed with L. inconspicua. The radula of a pre- 

 served specimen, examined recently, is somewhat intermediate 

 in character between L. inconspicua and L. ollonga (A. & H., 

 pi. 46, figs. 13 and 14), approaching more closely to the latter.^ 

 The Valencia animal was, however, certainly not L. ohlonga, 

 with which I am quite familiar. 



Genus — Goniodoeis. 



Groniodoris nodosa (Montagu). 



Goniodoris nodosa, A. & H. 



This species, which at Plymouth is one of the most abundant 

 and generally distributed of Nudibranchs, was far from common 

 at Valencia. I find it recorded as taken on the shore twice in 



1 Alder and Hancock state tliat the hook of the inner denticle in L. ohlonga 

 may be denticulated, though they represent it smooth in their figure. It is certainly 

 denticulated in two specimens examined at Plymouth. They do not figure the 

 radula of L. pusilla, but state that it resembles that of i. inconspicua. 



