C ^9S ) 
parted from each other varioufly, according to the va- 
riety of the fituation of thefe Shells in the Mud at that 
time. All which plainly Ihews, that as the Mud dried, 
the fuper-incumbent Weight prelled perpendicularly up* 
on the inclofed Bodies, which were then comprefled to- 
gether in that pofture they then hapned to lie in : And 
were more orlefs comprefled, according as the Mud got 
into their Cavities in greater or lefler quantities, and as 
it dried, propped them up on the infide againft the prefi 
fure of the Matter in which they lay. 
Short Notes upon the foregoing Account ; hy a 
Fellovp of the Royal Society, 
(a) fag. /1 Willughhy fays the Sdrgus has non« 
iVf of thefe round Teeth, which he calls 
tuhrcala OJfea, and makes that one of the Charafteri- 
fticks to diftinguifli it from the Sparus^ and Scarus^ and 
other Fillies ot that Tribe. However 1 retain the word, 
becauft S alias word is Sargo-; and perhaps Willughhy s 
Sargiis m^ij x\oi be Scillas Sargo, or, which is more 
probable, be might overlook that particularity in that 
Fifli which he difltfted. 
C^) thtJ. thtk tejiaceous Suhjlames^ which he 
here .fpeaks of, he means the Crufls of the Echini, of 
which he has given us fo many curious Defigns in the 
annexed Figures. He fcem$ to think that iht Echhu 
Marim are oi the tejtaceous K'tnd^ as alfb (everal very 
great Naturalifts have thought before him. Qefner^ after 
Afiflodey in. his l^omendator Animmttum Aquatilium\ 
rajnges tlien> v/ith the Ci^c^/^*^, Scallops, Pur^ 
puree 
