26 Natural Hiftory of — a | 
: that, as if by common Confent, upon fome Warning given, “ 
the whole Company at once funk down, and contraéted them 
felves into the Figure of a Mulberry or Bunch of Grapes, like 
that at Fig. C. After it had continued for fome Seconds in ‘t 
' this Form, it again expanded itfelf as before, and in this 
manner continued expanding and contradting itfelf, during 
the whole Time of Obfervation. ae | 
This Species of Polype feems to agree with Mr. Tremble’, 
Cluftering Polypes ; only his were in frefh, and thefe in Sea, 
Water. | flee 
Plate XV. N°, 23: Corallina exigua repens, denticulis alternis, fru 
Fig. a. A, A ig e - ? ' . 4 | 
tis medice cochleate emulis. 
Snail-trefoil Coralline. 
This very {mall but curious. Coralline was found creeping 
on the narrow-leafed Hornwrack of Ray’s Synopfs, called by 
him, Fuci telam lineam fericeamve textura fua amulantis al 
tera fpecies auguftior. R.S. pag. 4.3. N°. 10. Mil, 
From the irregular creeping tubulous Roots, by which it — 
adheres to the Fucus above-mentioned, .arife little Spikes ot 
Branches, furnifhed with alternate Denticles, moft curioutly 
furrowed, like the Seed-Veffels of the Plant called the Snail- 
trefoil. : ae ai 
Fig. a, Ne, 23. fhews the natural Size of this Coralline, 
creeping on the Hornwrack, sy 
Fig. 4, reprefents the creeping Tubes with the Denticles, 
and one Veficle magnified. While I was at Brighthelmftone, 
June 1754, I difcovered the Veficles of this Coralline ; for 
I had before apprehended the Denticles to be Veficles ; they | 
differ but little from the Denticles, only in the 3 Teeth that 
ar are 
