290 University of California Publications. [ ZooLocy 
(Pl. XVI, fig. 104). Joints black. Internodes club-shaped, stout. 
Zoecia depressed, narrower below and above than in the middle, 
truneate at each end; front wall caleareous, covered with minute 
protuberances. (Pl. XV, fig. 90.) Operculum (op.) some dis- 
tance below the top of the zocecium, lower edge slightly curved, 
bearing a denticle (d.) near each corner, upper edge semicir- 
cular. Oacial orifice (oe. or.) situated just above the operculum 
and resembling it in shape; a broad mucro (m.), a continuation 
of the caleareous zocecial wall in the middle of its lower edge. 
Avicularium (av.) in place of a zocecium, almost square. Root- 
lets springing from the lower zoccia of the proximal internode, 
passing down close to the wall of the internode, then spreading 
out disk-like around the base of the colony. 
In its habit of growth this species resembles C. australis 
Hincks (’84). The stems are not divided into internodes of 
definite and equal length by a regular dichotomous branching 
as is usual in typical Cellaria, but consist of rather stout, long, 
club-shaped cylinders giving off branches at any point appar- 
ently, though as in C. australis and C. mandibulata which it 
resembles in habit of growth and method of branching, always 
from the middle of a zoccium. The zowcia resemble those of 
C. australis in shape, but the position and shape of opercula 
and occia are different. Both have avicularia of the same gen- 
eral type, and of a character similar to C. fistulosa. 
Fine colonies have been obtained at San Juan Island, and in 
Port Orchard Channel, Puget Sound. It has also been dredged 
both at San Pedro and San Diego. 
Flustridae Smitt. 
Escharide (part), Johnston, 1847. 
Flustride (part), d’Orbigny, 1850. 
Flustrade (part), Busk, 1852. 
Flustride Smitt, 1867. 
Flustride, Hincks, 1880. 
Zoarium corneous and flexible, expanded, foliaceous, erect 
or sub-erect. Zowcia contiguous, multiserial. Avicularia usually 
of a simple type. 
