190S. CoivGAN. — Dublin ^larine Biological Committee. it^ 



boat were confined to the upper reaches of the River from the 

 ferr}'- stage to the railway bridge, and, as before, Halichondria 

 panicea was brought up in large masses. On stones from about 

 two fathoms low water two species of Chiton were found, both 

 rare for County Dublin, C 7'uber and C. Jascieularis, but only 

 one specimen of each was obtained. Oi Lamellaria perspiaia^ 

 four living specimens were taken here, all of the same dirty 

 yellow hue as those previously dredged by us from the same 

 ground. A few samples of the sponges and zoophytes were 

 brought home in a jar of sea water, and these on careful exami- 

 nation yielded me the following interesting Opisthobranchs ; — 



Runcina Hancocki, 2. Goniodoris castanea, I. 



-4igires punctilucens, i. G. nodosa, 2. 



Of these, Goniodoris castanea is new for Co. Dublin and for 

 east Ireland, and appears to have been only twice previously 

 recorded for the Irish coasts, the first time from Dursey 

 Sound, the second from Ballinakill Harbour. The Malahide 

 specimen agreed perfectly in coloration with the plate in 

 Alder and Hancock's "Monograph." For ^gires there is 

 only one previous Co. Dublin record. The occurrence of 

 Runcina here and at Bullock, some 12 miles south of Lambay, 

 where it was added to the Dublin marine fauna by Mr. Wol- 

 leston in 1906, shows that the species is widely distributed in 

 the county. 



December 14.^ — The Committee's last dredging trip for the 

 year was made on this day, the ground selected being Dalkey 

 Sound and its approaches. The Treasurer was the only re- 

 presentative of the Committee present, and operations were 

 carried on from a row-boat, manned by two Bullock fisher- 

 men well acquainted with the soundings and the nature of 

 the bottom. Only four scrapes were made altogether, two in 

 10 fathoms a little south of Bullock Harbour, one in mid- 

 Sound in about 8 fathoms, and a fourth in 15 fathoms^ about 

 a quarter of a mile south-east of the Battery on Dalkey 

 Island. Amongst the results of the first two scrapes, the 

 following are of interest : — 



Living. Dead. 



Polycera Lessonii, 3. Odostomia rufa, i. 



^gires punctilucens, i. DeutaUum tarentinum, 2 frao^s. 



Tritonia Hombergii, i. Venus casina, i valve. 



Leda minuta, 2. Tellina crassa, valves frequent. 



A 3 



