CORALLIFERI, 439 



Lamouroux separates from tliem 



Crisia, 

 Where the cells, placed in two (usually alternate) ranges, open on 

 the same face *. 



AcAMARCHtS t. 



Where, with the same arrangement Ave find a vesicle at each open; 

 ing \. 



LORICULA, 



Where each articulation consist of two cells placed hack to back, of 

 which the opposite orifices are near the top that is widened |. 



EUCRATEA, 



Where each articulation has but a single cell with an oblique aper- 

 ture §. We may approximate to them the 



Electra, Lamour, 

 AVhere each articulation is composed of several cells, arranged in a 

 ring ||, 



We should separate from them 



Salicorniaria, Cuv.^, 

 Where the cylindrical joints are hollow internally, with their entire 

 surface occupied by cells, arranged in quincunx : they lead to Flus- 

 tra, and perhaps to Corallina. In 



Flustra, Li?i. **, 



We find a great number of cells united like honey-combs, sometimes 

 covering various bodies, and sometimes forming stems or leaves, of 

 which, in certain species, one side only is furnished with cells, and 

 in others, both ; their substance is niore less corneous ft- 



* Sertularia ehumea, Gm., Ell., Corall., XXI, a, A; — S. scraposu, Id., XX, c, C ; 

 — S. reptans, lb., b, B, E, F ; — S. fastujiata, lb., XVIII, a, A. 



t Seiiularia neritina, Gm., Ell., Corrall., XIX, a, A, B, C. 



X Sertularia loricala, Ell., Cor., XXI, b. B. Lamouroux calls them Loricari^, 

 but that name has long been devoted to a Fish of the family of the Silurida?. 



§ Certularia chelaia, Gm., Ell., Corall, XXII, b, B ; S. cornufa,l^\., XXI, c, C. 



Here come the less numerous genera, Lafoka, Alecto, IIippothea, for which 

 see Lamouroux, op. cit. As to his Menippe.e (Sertularia JfabeUum, Gm. Sol. and 

 Ell., IV, c, c, 1, C, C, 1 ; and S. crispa, lb., I, D, D), I doubt whether they belong 

 to this group. 



II Flusfra veriicillata, Gm., Sol. and Ell., IV, a, A. 



^ Ccllularia salicornia, Ellis, Corall., XXIII ; — Cell. cereuMes, Ell. and Sol., V, 

 b, B, C, &,c. •,—Cell. cirrata, Sol. and Ell., IV, d, D i—CeU.Jtaljdlum, lb. c, C. 



** N.B. According to the observations of Spallanzani, Messrs. Audouin, M. Ed- 

 wards, and de Blainville, certain Flustra are inhabited by animals belonging to the 

 group of the Ascidite, but, according to those of MM. Quoy and Gaymard, there are 

 some which are very certainly inhabited by true Polypi. It is of consequence to 

 know what species belong to the one and to the other. 



tt Flustra foHacea, Gm. ; Ell., Corall., XXIX, a, A;—Fl. truncula, Id., XXVIII, 

 a, A;— i-7. bomhicina, Sol. and Ell., IV, b, B •,—Ft. carbasea, Id., Ill, 6, 7 ■,—Fl.pHosa, 

 Ell., Corall., XXXI, a, A, b ■,— lL tomentma, Miill, Zool. Dan., Ill, xcv, \,2;— 

 F/. foHiprewa, Moll., Esch., C, 9; Fl. mcmbranacea, Zool. Dan., CXVII, I, 2; — 

 Fl.papiracea, Moll., Escb., 8; — Fl. tubuJusa, Bosc, XXVII, III, x.xx, 2; — FL den- 



