438 POLYPI. 



Amatia, Lamour. — Serrialaria, Lam., 



Where they are united, in certain places, like the pipes of an organ *. 

 We might distioguish those species in which the cells, thvis dis- 

 posed, form a spiral line round the stem. 



Antennularia, Lam. — Caluanyra, Lamour, 

 Where the cells form horizontal rings round the stem f . 

 Thus the name of 



Sertularia proper. 

 Becomes restricted to those in which the cells are placed on both 

 sides of the stem, either oppositely %, or alternately §. The first 

 are even again separated by Lamouroux under the name of Dyna- 

 menes. 



Where the cells are extremely small we have his genus Thoea ||. 



FAMILY II. 



CELLULARII(a). 



Where each Polypus is adherent in a corneous or calcareous cell 

 with thin parietes and only communicates with the others by an ex- 

 tremely tenuous external tunic or by the minute pores which traverse 

 the parietes of the cells. These Polypi bear a general resemblance 

 to the Hydrse. 



Cellularia, Li7i. 



Where these cells are so arranged as to form branching stems in the 

 manner of the Sertulariae, but without a tube of communication in 

 the axis. Their substance also is more calcareous. 



* Sertularia lendigera, Ell., Cor, XV, b, B. 



f Lamouroux has since changed this name to Nemertesia ; — Sertularia anten- 

 nina, Gm., E'l., Cor., IX, a, A, B, C ; — Neinert. ramosa, Lamour., Ell., lb., b. 



X Sertularia uhietina, Gm., Ell., Corall., I, b, B; — S. tamarindus, Ih., &, A.; — 

 S.filicula, Soil, and Ell., c. C ; — S.pohjzonias, Ell., Cor., II, a, b. A, B ; — S. cupres- 

 sina, lb.. Ill, a, A ; S. argentea, lb., II, 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, Cavol., Pol. Mar. Ill, vi, 1,2 ; — S. fuscescens, Bast., Op. subs., 1, 

 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. 



§ Sertularia operculafa, Ell., Coral. Ill, b. B ; — S. pinastrum, Sol. and 'EW., vi, 

 b. B ; — S. rosaeea, Ell., Cor., iv, a. A, B, C ; — S.pumila, lb., V, a, A; — S. disticha, 

 Bosc, Vers, III, xxix, 1 ; — S. pelasyica, Id., lb., 3 ; — Dinam crisio'ide, Zool. de Frey- 

 cin., pi. xc, f. 12. 



il Sertularia hoeleciiu, Gm., Ell., Cor., X, a, A, B, C. For other subgenera 

 established in this family by Lamouroux — Pasythea, Salacia, Cymodocea — 

 see his Hist, des Polyp, flexibles, Svo., 1816, and his Expos. Method., des genres 

 des Polyp. 4to., 1821. 



{j::^ (a) The Polypes a Cellules of the original. — Eng. Ed. 



