3 
Annelida, Mollusca and Crustacea; the former through their 
vertical and horizontal burrows, the latter through the numerous 
impressions left on the littoral or exposed portion of the shore 
between tide-marks in all ages. Many recent Annelids live 
buried in the sand or mud of our modern sea-shores or in 
shallow water, communicating with the surface by means of 
perpendicular burrows; such may be termed “burrows of 
habitation.” In the oldest strata those errant genera which 
have been founded on remains of this kind are Scolithus, 
Histioderma, and Arenicolites, all of which are in rocks of 
Cambrian and Silurian age. Other genera construct or form 
long wandering, irregular and tortuous burrows a little below 
the surface, chiefly in a horizontal direction, which may be 
termed “ wandering burrows.’ Many of these in the Paleozoic 
rocks have been referred to fucoids or the melanosperm sea- 
weeds, under the generic titles of Palwochorda, Paleophycus, &c. 
The modern lobworm or Arenicola piscatorum of our own shores 
is referred to this class of burrows. Such worm-cases are 
familiar to all as one of the common objects of the sea-shore, 
in the form of coiled and tortuous heaps, and occurring in 
millions; such trails, tracks, or burrows are known to be due 
to the Errant Annelida. The order Tubicole, or second division, 
are for the most part inhabitants of calcareous or chitinous 
tubes, and are the Serpule, Sabelle, Terebelle, &c. The tubicolar 
Annelids are known to occur in and range from the lower 
Silurian rocks upwards, and such have received the names of 
Pyritsonema, Serpulites, Tentaculites, Tachyderma, Sabella, &e. 
Mr Erneripce entered into the more minute and structural 
particulars of this class, especially of the Hrrantia, or Dorsi- 
branchiata, to which division the newly found fossil form 
belongs. This unique form may not inappropriately be called 
Pachynereis, in reference to its large, long and robust structure, 
and to its affinities with the existing Nereis. 
Many diagrams and specimens of other genera were 
exhibited, together with a photographed representation of the 
new genus, which will appear in the published Transactions of 
the Club. 
The Club dined together at the Bell Hotel. 
B2 
