442 POLYPI. 
Garaxaura, Lamour, 
Where the stems are dichotomous, but their branches hollow *. 
Liscora, Lamour, 
Where the stems are hollow and dichotomous, but are without arti- 
culations t. 
It is perhaps directly after the Coralline that should come the 
ANADIOMENE, Lamour, 
Vulgarly termed Corsican Moss, and which is so useful as a vermi- 
fuge. . 
It is composed of articulations, regularly ramous, and consists of a 
somewhat corneous substance invested with a gelatinous covering f. 
Of all these productions without apparent Polypi, which are con- 
jecturally referred to the Coralliferi, few are more singular than the 
Acetabula, or 
AcetasuLum, Lam., 
Where we find a slender and hollow stem supporting a round thin 
plate, like a parasol, with radiating stria, cranulated at the edge and 
having a little smooth disk surrounded with pores in the centre. No 
Polypi can be discovered in them. The rays of the disk are hollow 
and contain greenish granules, a circumstance which led Cavolini to 
consider them as plants § S. 
One of them—Tubuwaria acetabulum, Gm.—Donat., Adri., 
{11; Tournef., Ins. CCCX VIII ||, is found in the Mediterranean. 
Potyruysa, Lam., 
Where, as in the preceding, we find a hollow and slender stem, but 
which bears on its summit a bundle of little closed vesicles in place of 
a disk formed of tubes 4. 
* Corallina obtusata, Sol. and El})., XXII, 2;—C. lapidescens, Id., Ib., 9 ;—Tu- 
bularia fragilis, L.; Sloane, Jam., XXX, 10;—Tubul. umbellata, Esper, Tubul., 
XVII ;—Corallina marginufa, Sol. anal Ell., XXII, 6 ;—Corall. fruticulosa, Ib., 5 ;— 
Galaxaure roide, Zool. de Freycin., pl. 91, f. 105 4d 
t Corallina marginata, Sol. and Ell., XXII, 6 ;—C. fruticulosa, Id., Ib., 5: 
t Anadiomene flabellata, Lamour., Poll. Flex., XIV, f. 3, and Sol. and Ell., App., 
pl. 69, f. 15, 16. 
N.B. The Galaxaure and Liagore form the genus DicHoTOMARIA of Lamarck, 
but are not, as that naturalist thought, eno Coralliferi, for there are no Polypi 
in the tube. 
§ I cannot find the openings round the circumference mentioned by M.de Lamarck. 
The tubes which form the rays are closed. The pretended tentacula described by 
Donati were forcign bodies. Neither the Acetabula nor Polyphysa are vaginiform 
Polypi. 
N.B. Since the first edition of this work, M. Rafeneau, of Lille, has presented a 
Memoir to the Academy, in which he considers the Acetabulum as a plant, belonging 
to the family of the Confervee 
\| Add the Acétabule petit model, Zool. de Freycin., pl. xc, f. 6, 7. 
{ Pol. aspergillum, Lamour; Sol. and Ell., App., pl. 69, f 2—6, or Fucus penicu- 
lus, D. Turner, Fuc., LV; pf.’ 228: 
