94 CLASS II. 
Flustra Li. Polypary of aggregate cells, membranaceous, fron- 
descent, lobate or expanded into a crust, celluliferous on one or 
both sides. The cells are often aculeate on the anterior margin, 
their opening transverse, semicircular, or lunate. 
Sea-Crust. Sp. Flustra foliacea Li., Eschara foliacea Patt., DE JUSSIEU 
Mém. de VAcad. royale des Sc. Année 1742. Pl. 1x. fig. 3; Eu. Corall. Pl. 
XXIX. fig. a, A, B,C, E; Cuv. R. Ani. édit. ul. Pl. Lxxvul. fig. 1; JOHN- 
ston, Hist. Br. Zooph. pp. 342, 343. Pl. ux. fig. 1, 2 ;—Flustra cornuta 
Mine Epw., Cuv. R. Ant. édit. ill. Pl. uxxviit. 1.1. fig. 2, &e. 
Eucratea Lamour. (in part). Mrtne Epw. Ann. des Se. nat., 2e 
Série, 1x. Zoolog. pag. 204, Pl. viii. 
B.) Cell (the posterior harder part of the animal) without oper- 
culum; a setose collar or a crown of sete in the anterior part of the 
body in many, or a muscular ring in others, in place of operculum. 
Tendra NorpM. 
Sp. Zendra zostericola, Cellepora pontica Kicuw. 
Tubulipora. Polypary calcareous made up of crowded tubular 
cells, parasitic or incrusting. Aperture of the cells orbicular. Ten- 
tacles 12. 
Sp. Tubulipora verrucosa MinnE Epw., Tubulipora orbiculus Lam. (syno- 
nymes excluded); Cuv. R. Ant. édit. ilustr., Zoophyt. Pl. Luxx. &e. 
Comp. on this genus MILNE Epwarps, Ann. des Sc. nat. 2e Série, VItt. 
Zoologie 1837. pp. 321 —338. Pl. xx1I—xxiv. Jounsron, Hist. Br. Zooph. 
pp. 265—274. Pl. xuvi. fig. 3, 4. 
Subgen. Diastopora Lam. 
Cellularia Pauu., Cellaria LAM. Polypary ramose, composed 
of cells arranged in a single or double row or verticillate, tubular, 
calcareous, with orbicular aperture. 
Sp. Cellularia eburnea, Crisia eburnea Lamour., Sertularia eburnea L., Exu. 
Corall. xxi. fig. a, A; Cuv. R. Ani. Edit. ill. Zoophyt. Pl. LXxim. fig, 2; 
Van BENEDEN, Nouv. Mém. de ?Acad. de Brux, xv. Pl. 1. fig. 12— 
16, &e. 
Comp. Minne Epwarps, Wém. sur les Crisies, les Hornéres et plusiewrs 
autres polypes vivans ou fossiles dont Vorganisation est analogue a celle des 
Tubulipores, Ann. des Sc. nat. 2¢ Série, Zoolog. Tom. 1X. 1838. pp. 193— 
238, Pl. vi—xv1; Van BENEDEN, Recherches sur les Bryozoaires, Nouv. 
Mém. deVAcad. de Brux. Tom. XvIIt. 1845. pp. I11—209. 
On the Polypary of this and some other genera shear-like organs 
are seen that have some resemblance to a bird’s head ; they have joints 
