1896,] DuKRDHN. — Notes on the Rock Pools of Bundormi. 155 



I obtained one specimen of the small greenish Nudibranch, 

 Hcrmoea dmdritica, Aid. and Hane., living amongst the green 

 Algae Bryopsis and Codiurn. Kept in captivity it laid a charac- 

 teristic round mass of spawn. It refused to live upon the 

 Codhwi, and in a few days lost most of its green colour, be- 

 coming yellowish brown. Garstang's experiments show that 

 this species entirely avoids the red sea-weeds, upon which its 

 colour would render it conspicuous. 



Many examples of the Nudibranch, Eolis coronata^ Forbes, 

 were found living amongst colonies of Tubularia larynx col- 

 lected from the Fairy Caves, their colours harmonising with 

 the light red of the polypites. 



A SUBMERGED PINE-FOREST. 



BY R. I,I,OYD PRAKGER, B-K. 

 (Read before the Dublin Naturalists' Field Club, March 9th, 1896.) 



Onk day in February last, Mr. R. Welch and I strolled along 

 the beach northward of the new harbour at Bray, and just 

 within the confines of the County of Dublin. At the verge 

 of low water, where the slope of coarse shingle gives way 

 to a more level stretch of fine sand and boulders, which is only 

 left dry at spring tides, we noticed some stumps and boughs 

 of trees, and on examining them, found that they were em- 

 bedded in a compact layer of peat, which dipped southward 

 at a low angle. The peat was full of branches and roots, and 

 of cones of the Scotch Fir. On the southern side it disappeared 

 under a bed of fine blue clay containing sea-shells ; to the 

 north, its broken edges overlay a stratum of coarse grey sand, 

 with rounded fragments of granite. We had but cursorily 

 examined the spot when the tide crept up again and soon hid 

 it from view. 



Here evidently was a geological story to be unravelled ; a 

 long history lay buried with this old peat-bed under the mud 

 and shingle which the sea had heaped upon it ; and it was for 

 us to read that history, if we could. Thus it came about that 

 in two days' time we again visited the place, and Mr. Welch 

 secured several excellent photographs of the deposit ; and a 

 little later, selecting a spring-tide, Mr. I^yster Jameson and I 

 went down and thoroughly examined the spot, and determined 

 the extent of the different beds and their relative position and 



