GO 
nest. One immediately entered into habitation, and the other tried 
his best to evict him, in his efforts dismantling part of the house 
but he did not succeed. On returning them to the dish containing 
the sand and loose small shells the houseless one quickly made a 
tube. 
The tube was made as follows from small stones and shells. The 
first particle was caught up by the inferior antennas— the small 
terminal spines aiding them in this function — and handed back to 
the gnatliopoda. The animal was lying on its side and the particle 
was subsequently placed by the inferior antennae on the exposed side of 
the body. Another piece was added ventral to this one after being 
provided with cement evidently from the mouth. The process was 
rapidly repeated the animal moving the connected pieces round to 
make room for the new ones, and latterly shifting its own position 
as the tube was being made. It was also by moving forwards in the 
tube, and adding particles to the anterior edge that the tube was 
completed. When finished it was tested by the animal moving out 
almost completely and then retreating and tucking itself in. 
Frequently a largish piece of stone with a ready made tubular 
hole was chosen and only treated at the mouth with small additions 
to perfect it. 
* Corophium bonelii, M. Edwd. 
One specimen off Cullercoats, 8th August, 1900. 
Unciola crenatipalmata (Bate). 
Near the rocks at Cullercoats, August, 1899. 
Family — Dulichvidcc. 
Dulichia monacantha, Metzger. 
One specimen from 25 miles east of Durham in 45 fathoms on 
muddy sand. Got many years ago by Dr. Brady, whom I have to 
thank for this and many other specimens. 
Tribe — Caprellidea. 
Family — Oaprellidce. 
Phtisica marina , Slabber. 
Several specimens from 8 miles off Cullercoats. 
Caprella linearis (L.). 
Abundant in the near North Sea among Sertularians. On 
Hjjdrallmania falcata it is always obtained, and it is often very 
difficult to see the Caprella when it is hanging on to the branches 
of the zoophyte. It is larger from the deeper water. 
