CORALLIFERI. 441 



white, reddish, or greenish. It was formerly employed in phar- 

 macy on account of its calcareous nature *. 

 Lamouroux also distinguishes, but for trivial reasons, 



Amphiroea, 

 Where the articulations are elongated f. 



Jania, 

 Where the branches are merely more slender and the articulations 

 less cretaceous J. 



Cymopoua, 

 Where the articulations are separated from each other § by corneous 

 intervals ; the pores on their surface are more decidedly marked. 

 M. de Lamarck had already separated 



Penicilla, 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 analo- 

 gous to those of the ordinary Corallinae ||. 



Halymedes, Lamow, 

 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 ^. 



Flabellaria, Lam., 

 Where there are no distinct articulations; they consist of large 

 foliaceous expansions formed like the joints of the Halymedes and the 

 stem of the Penicillee, of corneous threads enveloped with a calca- 

 reous crust**. 



* Add Corallina elongata, Gm., Ell., Corall., XXIV, 3; — C. cupressina, Esper., 

 Zooph., VII, 1, 2;— C. squammafa, Ell., XXIV, c, C;— C. granifera, Sol. and Ell., 

 XXI, c, C ; — C. subtdata, Id., lb., b ; — C. Turneri, Lamour., Pol. Flex., X, 2 ; — C. 

 a-ispafa, Id., lb., 3 ; — C. simplex, Id., lb., 4 ; — C. calradosii, Sol. and Ell., XXIII, 

 14 ;— C. palmata, Id., XXI, a, A ;— C. sagittata, Zool., de Freycin., pi. 95, f. 11 

 and 12. 



t Corallina rigens, Sol. and Ellis, XXI, d; — C. tribulus, Id., lb., c ; — C. cuspidata, 

 lb., f ; — Amph.fitcoules, Lamour., Polyp. Flex., XI, 2 ; — Amph, gailloni, Id., lb., 3 ; 

 — A. verrucosa, Id., lb., 5 ; — A. jnhafa, lb., 6. 



I Corallina rubens, Ell., Corall., XXIV, f. F; — Jania micrarthrodia, Lamour., 

 Pol. Flex., I, 69, f. 5, and Sol. and Ell., pi. 69, f. 7 and S ; — J. crassa, Id., pi. 69, 

 f. 9, 10 ; — J. conipressa, Zool. de Freycin., pi. 90, f. 8, 9, 10. 



§ Corallina barbata, Gm., Ell., Corall., XXV, c, C ;— C. rosarium, Sol. and Ell., 

 XXI, b, H. 



II Corallina penicillus; — C peniculum ; — C. phoenix; — Nesea nedidosa, Zool. de 

 Freyc.,pl. 91, f. 8, 9. 



^ Corallina tuna, Soil, and Ell., XX, e;— C. opuntia, Id., lb., b; — C. i7icrassaia, 

 Id., lb., d. It is the second division of the Flabellarise of Lamarck. 



*» Corallina conglutinata, Sol. and Ell., XXV, 7 •,—C. flabellum, lb., XXIV. C; 

 and C. paronia, Esper, Corall., VIII, IX — the first division of the Flabellariae of 

 Lamarck. Lamouroux has changed this name to Udotea. 



VOL. IV. GG 



