398 POLYPI. 
AMATIA, Lamour.—SeERRIALARIA, Lam. 
Where they are united, in certain places, like the pipes of an or- 
gan(1). 
We might distinguish those species in which the cells, thus dis- 
posed, form a spiral line round the stem. 
ANTENNULARIA, Lam.—Ca.uianyra, Lamour, 
Where the cells form horizontal rings round the stem(2). 
Thus the name of 
SERTULARIA proper 
Becomes restricted to those in which the cells are placed on both 
sides of the stem, either oppositely(3), or alternately(4). ‘The first 
are even again separated by Lamouroux under the name of Dyna- 
menes. 
Where the cells are extremely small we have his genus THorEa(5). 
(1) Sertularia lendigera, Ell., Cor., XV, b, B. 
(2) Lamouroux has since changed this name to Nemertesta;—Sertularia anten- 
nina, Gm., Ell., Cor., IX, a, A, B, C;—Wemert. ramosa, Lamour., EIl., Ib., b. 
(3) Sertularia abietina, Gm., Ell., Corall., I, b, B;—S. tamarindus, Ib., a, A;— 
S. filicula, Sol. and Ell., c. C;-—S. polyzonias, Ell., Cor., IL, a, b, A, B;—S. cupres- 
sina, Ib., III, a, A; S. argentea, Ib., I, c, C;—S. thuya, Ib., V,b, B;—S. cupres- 
soides, Lepech., Act. Petrop., 1780, IX, 3, 4,—S. lichenastrum, Ell., Cor., VI, a, 
A;—S. racemosa, Cayol., Pol. Mar., III, vi, 1; 2;—S. fuscescens, Bast., Op. subs., I, 
6;—S. obsoleta, Lepech., Act. Petrop., 1778, pars II, VII, B;—S. pinus, Id., 1780, 
p. I, IX; 1, 2;—S. cuscuta, Ell., Cor., xiv, c, C. 
(4) Sertularia operculata, Ell., Coral., Ill, b. B;—S. pinastrum, Sol. and Ell., vi, 
b. B;—S. rosacea, Ell,, Cor., iv, a, A, B, C;—S. pumila, Ib., V,a, A;—S. disticha, 
Bosc, Vers, ILI, xxix, 2;—S. pelasgica, Id., Ib., 3;—Dinam crisivide, Zool. de Frey- 
cin., pl. xc, f. 12. 
(5) Sertularia helecina, Gm., Ell., Cor., X, a, A, B, C. For other subgenera 
established in this family by Lamouroux—Pasytnra, Satacia, Crmopocra—see 
his Hist. des Polyp. flexibles, 8vyo, 1816, and his Expos. Méthod., des genres des 
Polyp. 4to, 1821. 
