VoL. 2] Robertson.—Non-Incrusting Bryozoa. 20% 
boat-shaped (fig. 64, zoe.), having two erect spines (e. sp.) above 
the mouth, and a variable number of marginal spines, Six, seven, 
or eight on each side of the aperture; tubes (con. t.) connecting 
the zoocia arising near the base of each zocecium laterally or on 
the dorsal surface, 7.e., the side opposite the aperture; near the 
point of origin of a tube a septum (sep.) forms, the longer por- 
tion of the tube being continuous with the zocecium of which it 
forms a sort of pedicel; opposite branches may be given off from 
the base of each zowcium (br.). Owcia? Rootlets (text fig. 1, 
r. f.) consist of tubular processes of varying length given off 
from the basal surface of each zocecium and terminating in a 
disk from which finger-like processes extend anchoring the colony 
to the substratum. 
Beania mirabilis is obtained in considerable quantity growing 
over Alcyonaria and Bowerbankia at Dead Mans Island and 
Santa Catalina Island. 
25. Beania longispinosa sp. nov. 
Pl. XII, figs. 65, 66. 
Zoarium sub-erect, consisting of groups of zocecia united by 
tubular connections (fig. 65). Zowcia boat-shaped, slightly con- 
tracted above, alternate; aperture membranous occupying the 
whole of the front; orifice terminal; spines remarkable for their 
length, the two upper ones (fig. 66, st. sp.) stiff and flaring out- 
ward; seven to nine pairs (cr. sp.) on the margin, inclined in- 
ward, crossing above the aperture, their tips frequently ex- 
tending beyond the lateral edges. Connecting tubes very short, 
often hidden by the overlapping lateral walls of the zocecia, 
usually two on each side, uniting lateral zocecia, one at each end 
uniting with a zocecium laterally and proximally. No avicu- 
laria. Oacia (oe.) small, situated at the summit of the zocecia, 
marked by parallel striae extending longitudinally. Rootlets very 
long, extending from the dorsal surface of many of the zocecia, 
sometimes 50 or more mm. in length (fig. 65, 7.). 
This species seems to be related to Diachoris hyadesi Jullien 
(’88) in the number of spines and the arrangement of the con- 
