THEOiNOlDiE. 13i 



cases, to distinguish them from F. aurantium. But if one of the masses be split vertically, 

 the peculiar arrangement of the bundles of tubes, closely resembling that of Tubipora 

 musica, will at once solve all doubts. In cases where the surface is less worn, the circular 

 eminences afford an obvious character. 



In speaking of Fungella midtifida (p. 119), it is suggested that that species may 

 probably merely represent the young state of Fascicularia tubipora. This is a uuitter for 

 future determination, but the mere inspection of the figures will show sufficient ground 

 for the suspicion that they may stand in the relation suggested. 



2. F. AURANTIUM, Milne- Edwards. PL XXI, fig. 2. 



Cellularum fasciculis confertis, sa?pius irregulariter coalitis ; polyzoarii superficie 

 rugosa ; rugis anastomosantibus sinuosis, cancellatis ; interstitiis striatis. 



Tubes assembled into compound bundles, which anastomose irregularly with each 

 other, and project on the surface in elongated, tortuous, anastomosing ridges, upon which 

 the cells open ; intermediate surface striated. 



Apsenuesia cerebrifokmis (?), Blainville, Man. d'Actin., p. 409 ; M. Edio. in Lamarck, 



2d ed., ii, p. 290 ; Mitkelin, Icon. Zoopli., p. 314, pi. Ixxv, 

 %. 5. 

 Fascicularia aurantium, Milne Edwards, (M. S., 1830) ; Sir C. Li/ell. Man. Elem. 



Geo!., 5tli ed., p. 1/2, fig. 154 ; J. Morris. 



Habitat. — C. Crag, S. Wood; J. S. Bowerbank ; Valduc (Bouches-du-llhone), Done 

 (Maine-et-Loire), Michclin. 



ADDENDA AND COEEIGENDA. 



1. ESCHARA SOCIALIS («. Sp.) PI. XXII, fig. 1. 



Polyzoario pedunculato, e centro disci orbicularis, incrustantis surgenti. Cellulis sub- 

 ovalibus sen hexagonis, immersis, inaYpialibus, sparse punctatis. Orificio orbiculari, 

 infra emarginato. Aviculario parvo mandibula acuta ascendenti, ad unum latus prope 

 orificium posito. 



