84 
LETTERS RELATING TO FHOLAS. 
according to my present arrangements I must make my last 
conchological visit to Tenby at that period, and like birds of passage, 
I migrate only once in the year. I am in the mean time willing to 
hope that the daughter, sister, wife and mother of Etonians may 
he induced in her customary migrations from the country to town, 
to look in upon us at the Lodge, and I hereby promise the Arch- 
deacon that he shall he at full liberty to wander about the Playing 
Fields and School Yard and all other places though out of bounds, 
which may bring back to his recollection his former amusements, 
while Mrs. Goodall and myself, shall have the pleasure of showing 
our sister conchologist the fruits of our twenty years labour in our 
respective cabinets. Mrs. Goodall unites in best regards to yourself 
and the Archdeacon and in sincere wishes that you are now 
a perfect convalesent with 
My dear madam 
Your obliged & faithful servant 
J. Goodall. 
If called upon for a defence of the Genera Balia, Mytilus , 
Ostrea and Helix of Linnaeus, what could the most zealous disciple 
of his school say l He would hardly contend that the Bulla 
acliatina and hydatis, Mytilus hi run do and anatinus , Ostrea malleus 
and pul Hum, or the Helix scarabeus and stagnalis were connected 
by any ties of visible affinity. I would further say that the 
divisions of the Linmean genera, (exclusive of the extreme 
difficulty of reducing certain individuals of anomalous aspect to 
any of those divisions) lead to more real doubts and puzzles than 
the present generally prevailing practice of admitting the received 
extension of genera. Lamarck has himself, however, in his last 
half volume, corrected himself by expunging some of his distinctions 
as unnecessary. For instance, he now considers his Amphibulimus 
or Amphibulima as a Succinea. Sowerby had come to the same 
conclusion, who also considers the heterostrophe Bulla fontinalis 
and hypnorum as belonging to the genus Linno&a, and as appears 
to me very reasonably. 
I may add that the specimens have now been submitted to 
Mr. Smith of the British Museum and to Mr. Sowerby, with the 
result that, at first sight, both pronounced them to belong to an 
