CORALLIFERI,. 403 
JANIA, 
Where the branches are merely more slender and the articula- 
tions less cretaceous(1). 
CyMopo.ia, " 
Where the articulations are separated from each other(2) by cor- 
neous intervals; the pores on their surface are more decidedly 
marked. 
M. de Lamarck had albeady separated 
Penrcitta, Lam.—Nesea, Lamour, 
Where the stem is simple and composed internally of corneous 
fibres woven, and, as it were, felted together; it is encrusted by a 
calcareous covering, and terminated by a bundle of articulated 
branches analogous to those of the ordinary Corallinz(3). 
HatymMepEs, Lamour, 
Where the stems are articulated and divided as in Corallina; but 
the substance of their joints, which are very wide, is penetrated inter- 
nally by corneous threads, from which the calcareous crust is easily 
detached by acids(4). 
(1) Corallina rubens, Ell., Corall., XXIV, f. F;—Jania micrarthrodia, Lamour., 
Pol. Flex., I, 69, f. 5, and Sol. and EIl., pl. 69, f. 7 and 8;—J/. crassa, Id., pl. 69, f. 
9, 10;—J. compressa, Zool. de Freycin., pl. 90, f. 8, 9, 10. 
(2) Corallina barbata, Gm., Ell., Corall., XXV,c, C;—C. rosariwm, Sol. and Ell., 
XXI, h, H 
(3) Corallina penicillus;—C. peniculum;—C. Mier »—Nesea nedulosa, Zool. de 
Freyc., pl. 91, f, 8, 9. 
(4) Corallina tuna, Soll. and Ell., XX, e;—C. opuntia, Id., Ib., b;—C, incrassata, 
Id.,Ib.,d. Itis the second division of the Flabellarie of Lamarck. 
