[ 45 1 ] 
III. The Figure of the Muftela foffilis ; com- 
municated from Dr. Gronovius at Leyden 
to Mr. Peter Collinfon, F, R. S. 
iJWMarchi z. U STELA fojjilis, five Cobites coeru- 
*74 - 7 - J.YA lefcens, lineis qttinque nigris longitu- 
dinalibus. Arted. Ichthyol. gen. xi. 3. *. Vide Tab, II. 
Fig. 1. 
This Fifh was kept alive in a Jar of Water a Year 
wanting 9 Days, without changing the Water, and 
without any other Food than what the Water af- 
forded. They dig them out of the Sands near We- 
fel in Holland. 
IV. Some Obfervations on the Belluga-Stone, 
by Mr. Peter Collinfon, F. R. S. 
Read March ia.'T^HESE Stones of the Belluga were 
174 7 ' A collected by Dr. Cook at Vlftracan , 
and fent to Dr. Sanches at Betersburgh, by whofe 
Favour they came to me. I have applied to thofe 
Gentlemen to fatisfy my Inquiries about them, and 
the Accounts they have communicated, with my 
own Obfervations, are as follows : 
The Calculus of the Belluga is found of various 
Shapes and Sizes ; it is moftly of a flatted oval Fi- 
gure, 
* W illoughby , Hiji, Pifc. p, 1 24. T a b , G. 3, 4, Raii Syn. Fife. p, 69. 
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