278 ; . 
PETRICOLA PHOLADIFORMIS LAM. 
HANS SCHLESCH, 
Copenhagen. 
A SHELL which has received the attention of malacologists 
in recent years is Petricola pholadiformis Lam., a species 
found along the east coast of North America (the northernmost 
locality known being Prince Edward’s Island), and the West 
Indian Islands, and it is everywhere very common. 
In Europe it was first recorded from England (Cricksea, 
Essex) by William Crouch, 1890, and later was found by 
Cooper, at Burnham-on-Crouch in 1895, and at Shellness, Kent, 
in 1896, at Herne Bay in Kent, by Kennard, in 1896, and has 
been noted in many localities along the coasts of Essex, Kent, 
Suffolk, Norfolk and Lincolnshire (Mablethorpe, 1909, by 
Carter). 
On the Continent the species was first found at Nieuport, 
Belgium, by Loppens, in 1899, and later was observed at 
several places along the Belgian coast (Coq-sur-Mer, 1900 ; 
Wenduyne, 1901; between Blankenberghe and Clemskerke, 
1902; Ostend, 1903). From the French coast in the Channel 
it has only been noted from a few localities (Dunkirk, Calais, 
etc.), but north of this region it is certainly spread everywhere 
along the coast of Holland (Noordwijk, 1907), Germany (between 
Norderney and Juist, 1906, by Dr. E. Wolf, and from Rom6, 
Sylt, Amrum, Fohr and the Hallingen by Cesar Boettger). 
In Denmark, Petricola pholadiformis has been noted from the 
islands Fan6 and Mané6 in 1907, by myself. Later I noticed it 
along the Danish North Sea coast (Blaavandshuk, 1908 ; Har- 
boGre, 1909; Vigs6-bay, 1910; and lastly, this year, I91I, in 
large numbers at Svinklov). 
Petricola pholadiformis best likes still, shallow water, 
especially with a clayey bottom, and it seems remarkable, 
therefore, that it should have been able to cross the ocean. It 
is found in company with Pholas candida and Zirphea crispata. 
+e 1 
Transactions of the Hull Scientific and Field Naturalists’ Club, Vol. IV., 
bene Se ue, Bee 
This part just issued covers the work of the Society in 1908-10, and, 
besides giving evidence of a vigorous vitality, contains much interesting 
information on the many branches of science which come within the scope 
of its operations, Two articles occupying the lion’s share of the space, deal 
with numismatics, a subject which has deservedly come to the front within 
recent years. The remaining three papers are on natural history subjects, 
and deal with diatoms, spiders and beetles. The addition of twenty-six 
new species to the list of East Yorkshire Spiders is especially noteworthy. 
The splendid results which have attended Mr. Stainforth’s researches 
amongst the Arachnida, should be most gratifying to him and to his 
fellow-workers in the Club. They should also act as a stimulus to others 
to take up orders generally neglected, and thus add materially to our 
knowledge of the local fauna.—E.G.B. 
Naturalist, 
