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olhef^ and nearly of the fame lize at each end. 
None of the above-mentloped writers have had the 
fatisfaflion of infpedting the inhabitant of the Ihell, 
which indeed is very difficult. Npw as this infedl: 
bears a flrong likenefs to the new fpecies, which I 
am about to defcribe, we ffiall take a view of both ' 
together. 
As I was walking in the month of November 1767 
along the ffiore, out of the Weftern gate of Copen- 
hagen, I faw in a ditch of' freffi water, a conferva % 
which I carried home with me. I imihediately put^ 
a lump of it to dry upon the, flove j after which, 
upon Ipoking at it through a glafs, I difcovered here 
and there feveral fmall white points,^ very fmooth 
and ffiining.' Thefe I took up upon the point of a 
pin, and on a clofer vievy found them to be two 
valved ffiells hardly difcerjnible. The hinge, toge- 
ther with the opening and figure of them, juffified 
my opinion* I feparated the valves, and the rifing 
part of the hinge to the edge ffiewed them to be 
ffiells. I regretted that the infedf , a fight of which 
was abfolutely necelTary, to rank them among the 
teftaceous kind, h^d been defirpyed by' the heat of 
the flove. The frofi; came on, and prevented ray 
making any further enquiries* I ffiewed my fliells 
to three naturalills of known abilities, ,whp agreed in 
afiliring me that they were of the mulcle kind. I 
had ftill fome, doubt arifing from tjie recol- 
ledllon of the infedt above-mentioned •f*., which I 
had found formerly; and I put off the dccifion, till 
* Flora Fridrickfdalina, I016. 
t Fauna Fridrickfd. 851* 
I had 
