ZOOLOGY OF FERNANDO NORONHA. 
505 
the aperture and giving off processes from its upper border ; 
operculum entire, large, oval, marked with concentric strise ; on 
Fig. 1. 
Scrupocellaria frondis, n. sp. 
some cells a small pointed avicularian cell projecting from the 
front of the cell ; lateral avicularia wanting ; on dorsal surface 
vibracula, small, flattened, obliquely placed ; setae long. Ooecia 
small, globose, vitreous, punctured. 
The presence of the antler-like spine across the top of the area 
is a marked character of S. frondis. 
Loc. Fernando Noronha ; Pernambuco. 
Family Celleporid.ze. 
Genus Cellepora. 
Cellepora Ridleyi, n. sp. (Fig. 2, p. 506.) 
Zoarium loosely encrusting; zooecia decumbent, rectangular, 
and flattened at the margins, heaped, somewhat ventricose sub- 
vertical in the centre, separated by raised lines ; orifice from 
semicircular to subquadrate, with concave proximal margin ; two 
or three short processes surrounding the orifice ; at base of an 
anterior process a small avicularium facing inwards, with small 
semicircular mandible. On the front of some cells a small avicu- 
larian cell with small rounded mandible. Ooecium shaped like a 
thick semi-disc, concave below, overhanging the mouth of the 
LINN. JOURN. — ZOOLOGY, YOL. XX. 39 
