( M>4 ) 
1. $art of a Letter from Robert Sibbald, IQtigbt, 
to Dr Hans Sloane 3 S . Seer, concerning a Se- 
cond Volume of his Prodromus Hiftorix Natu- 
ralis Scoriae ; with a Defcription of the Pediculus 
Qxti, &Ce 
Edinburgh, OSfob. 8. 1706. 
Y Ou ask in yours about the C<etologia : l wrote it 
indeed in our Language about two years ago$ but I 
find fofew here curious of that fort of Learning, I judg’d 
it better to publifh it in Latin, in the 2d Volume of my 
Frodro/nus Hijlori & Natural is, 'I am now preparing* for 
the Prefs. There are many wild Plants, and many Mi- 
nerals to be added, which were not mentioned before • 
but the Bulk of it will be the Fifties and other Aquatiles , 
of which we have many rare and very remarkable: I 
have feveral in Plates, and am caufing the others to be 
drawn, 
Amongft them is this curious Shell Fifb, Fig. 1. which 
M v Fojler, a Regent in the College of St Andrews, fent 
to our Colledge • feveral of them he fays were taken up- 
on the tides of a Whale that-was caff in there. Such ano- 
ther was call: in in Edinborrow Frith feme 50 years ago. 
I gave a rude defcription of the Shell of tin c I got, in my 
Auffluarium Mufai Balfouriani, pubhfhed Anno 1697. but 
this hath the Animal in it. We have got but one, elfe I 
had (ent you one. i have fent the Figure of it drawn by 
an Arcift 5 if l had got another, I would have cut this in 
two, to have conlider’d the inward parts but this ought 
to be kept entire. It is the Balanus Bal^ndcntdam Oceani 
Septentrionalis adherens D, Mart . Lijkri, Fhji. Conchil. 
