2 GEORGE BUSsK, 
allied but quite distinct form were obtained on the 10th 
September, 1875, in lat. 9° 5’—10’ 8., long. 30° 49’—53’ W., 
from a depth of from 32 to 400 fathoms ; and again, on the 
14th December, 1875, in lat. 33° 31’ S., long. 74° 43’ W., 
from a depth of 2160 fathoms. 
These different forms constitute certainly three and, as I 
am inclined to think, four distinct and well-characterised 
species ; but they all agree in certain very peculiar characters, 
which would seem to be almost, if not quite, sufficient to 
render the group composed of them of generic value, or, at 
any rate, to rank as a distinct sub-genus of Bugula. 
To this genus or sub-genus the appellation bestowed upon 
it by Koren and Danielssen obviously has priority over 
Naresia. 
The species belonging to this group at present known 
are : 
1. Bugula (Kinetoskias) Smittii, Dan.; Kinetoskias Snutti, 
Kor. and Dan., 1. ¢.; Bugula Smitti, Sars. 
2. B. (Kinetoshias) arborescens, Daniells.; Ktnetoskias 
arborescens, Kor. and Dan., 1. c.; Bugula umbella, Smitt, 
Ge 
3. B. (Kinetoskias) cyathus, W. T.; Naresia cyathus, 
C. W. T.,1.¢.; ? Kinetoskias Smuttic, K. and D., 1. c. 
4, B.(Kinetoskias) pocillum, n. sp., mihi. 
1. A. Smitidz is thus characterised by Koren and Daniels- 
sen. 
“Zoarium umbellate, with four strong main branches 
springing from a stem about 150 mm. (6 inches) in length, 
which is cylindrical, naked, and completely pellucid, and gra- 
dually thickened towards the lower end, from which numerous 
yadieal fibres proceed, by which the growth is affixed to 
small stones or sand. The branches are biserial, and divide 
several times dichotomously. The zoecia are about 0°S mm. 
(0:03 inches) long, with a breadth of 0°31 mm, above, and 
ef 0:13 mm. below. In shape they are elongated and 
tapering below, truncate above. The posterior surface 
is striated transversely towards the lower part. A short 
spine is placed on the upper and outer angle. On the upper 
and anterior border of the zowciwm there is a blunt, solid, 
horny, conical process, which appears to serve as the point 
of insertion of a strong muscle, which expands on the 
anterior surface of the superjacent zowciuwm. This musele is 
attached to the conical process by a tendon.” 
“Phe avicularia are placed on the outer border of the 
zocecta, a little above the middle. They are of an elongated 
form, with a rather long mandible curved at the point. The 
