14 TEANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



at all, for it to extricate itself; and one in which the shell 

 was SO jammed in between projecting points of rock romid 

 which it was moulded, that I was not able even with the 

 careful use of a strong knife-blade to get the shell out 

 entire. Whether the limpet is sometimes able to obtain 

 sufficient food by raising slightly the edges of its shell I 

 cannot say, but certainly the last few cases mentioned 

 seem to prove that individuals now and then fix themselves 

 in positions which after a time they cannot leave on 

 account of the growth of their shells. 



For the rest, our programme at Puffin Island was much 

 as usual. We bathed about 7.30 a.m., and collected 

 specimens on the rocks at low tide for an hour or so before 

 breakfast ; Mr. Thompson took tow-nettings from the 

 punt round the shore, and Mr. Leicester searched the 

 cliffs and the bushes for land mollusca. We examined 

 into the condition of the boats, the rain gutters on the 

 roof, and the water cistern, and made arrangements for 

 the necessary repairs. Finally, we gave instructions to 

 the new keeper in regard to the tinned meats and other 

 stores to be laid in, and the best way of providing meals 

 for the biologists who might be going down to work at the 

 station during the Easter vacation. 



One noticeable feature of the shore at this time was that 

 the specimens of Littorina rudis, which are so very abun- 

 dant in summer and autunm on the rocks above high 

 water mark, were now almost entirely absent. The only 

 ones left were a few odd individuals down at bottom of 

 deep clefts and crevices, perhaps unable to get out. 



On April 8th, Dr. Hanitsch went down to Pufiin Island 

 to work at Sponges. He obtained Tetliya hjncurium and 

 Baspailia ve/itihihrum which had not been found on the 

 island before and also three other species new to the dis- 



