CELLEPORID^E. 57 



(a) Ramose, not encrusting. 

 1. C. CORONOPUS, S. Wood. PI. IX, figs. 1, 3. 



Polyzoario niagno, e rarais cylindraceis apice subattenuatis composite. Cellulis ventri- 

 cosis, glabris, rostratis, subinde basi punctatis, ostio orbicular!, peristomate antice sinuato. 



Polyzoarium large, ramose, branches cylindrical, tapering at the point ; cells ventricose ; 

 orifice, orbicular, with a narrow sinus in front ; .1 large preoral rostrum ; surface entire, 

 smooth ; sometimes a few minute punctures around the base. 



CELLEPORA CORONOPUS, S. W., 1. c., p. 18. 



SCYPHIA CELLULOSA (?), Mi'mster, Gold/., Petref. Germ., p. 9, pi. xxxiii, fig. 12. 



Habitat. C. Crag, very abundant, 8. W., J. 8. B. 



The appearances represented in Goldfuss's magnified figure of Scyphia cellulosa are 

 so precisely those of the present species, that the two might, with little hesitation, perhaps 

 be regarded as identical, were it not that Scyphia cellulosa is represented as hollow, 

 whereas all the Crag specimens are solid. 



The external characters again of C. coronopus agree in many respects with those of 

 Cellepora cervicornis as figured by Mr. Couch (' Corn. Fauna,' pt. iii, p. Ill, pi. xx, fig. 1) ; 

 but as that species is described in the text as having the branches compressed, and the 

 cells arranged quincuncially, it probably, notwithstanding Mr. Couch's opinion to the 

 contrary, corresponds with Cellepora cervicornis of Dr. Johnston, which is in all pro- 

 bability in reality Eschara cervicornis ('Brit. M. Cat.'). But a recent species of Cellepora, 

 in habit having a very close resemblance to Cellepora coronopus, does exist in the Northern 

 Seas. Specimens of this form were collected by Mr. M. Andrew, on the coast of 

 Norway, and described by me in the 'Annals Nat. Hist.,' 2d Ser. xviii, p. 32, pi. i, fig. 1, 

 under the appellation of Cellepora cervicornis. At first sight it appeared natural to 

 suppose that the Crag fossil and this species were the same, but the minute characters are 

 amply sufficient to show that they are quite distinct. In Cellepora cervicornis (mihi) the 

 cells are coarsely punctured and grooved ; the mouth is of the same form as that of 

 C. coronopus, but has on each side of it an avicularium, none of which appearances are 

 any where traceable in C. coronopus. On the whole, therefore, this must be regarded as a 

 distinct and, so far as I know, an extinct form. 



