A. W. WATERS—REPORT ON THE BRYOZOA. 173 
acuminate at the end, reminding us of the peristome of Lichenopora : some- 
times these are thin like the point of a knife, in others they are much more 
solid, though not forming a continuous tube. This Red Sea form is closely 
allied to the Anarthropora horrvida, Kirkp.; but in that species the zocecia are 
smaller, the pores are more numerous, and there is a narrow lateral avicu- 
larium. Both belong to the same genus, but the material is not sufficient 
for a discussion of this point.  Lagenipora, as I now understand it, has an 
ovicell below the peristome, with a flat perforated area. However, in the 
species now mentioned the ovicells are unknown, so that we can only leave it 
provisionally under Layenipora, to await further examination. 
Loc. Victoria (IlacG.) ; Gimsah Bay, collected by Hartmeyer. 
SMITTIA NITIDA (Verrill). (Plate 17. figs. 19, 20.) 
|Discopora nitida, Verrill, Amer. Journ. Se. ix. (1875) p. 415, pl. 7. fig. 5. 
There has been some cenfusion over S. nitida, V., and several of us must 
plead guilty to an undue tendency to make varieties round a few species, 
before various characters were sufficiently understood. In the British 
Museum there are some good specimens sent by Verrill as nitida, though 
some other species, some of which were not even Smittia, had been in- 
advertently included. It has the square cells as figured by Verrill, a nearly 
round oral aperture, with a perisiome somewhat raised at each side, two oral 
spines, and either a small avicularium rounded and expanded at the extremity, 
or in some zocecia a stout triangular avicularium also directed downwards. 
Some specimens examined since fig. 19 was drawn have ovicells which are 
large and raised, with a central area in which are large pores—that is, they 
are of the trispinosa type, being much like those shown on PI. 1%. fig. 9. 
Loc. Long Island Sound (Verrill) ; Ras el Millan, collected by Hartmeyer ; 
and lat. 16° N., long. 41° W., 30 fath., collected by Loffler & Siemens. 
SMITTIA TRISPINOSA, var. PRoTECTA, Thornely. (Plate 17. figs. 5, 6.) 
Smittia trispinosa, var. protecta, Thornely, ‘‘ Manaar,” p. 128 (1905). 
Smittia nitida, Hincks, Ann. Mag. Nat. Hist. ser. 5, vol. vii. (1881) p. 159, pl. 9. 
fig. O. 
The zocecia in the Red Sea specimens are arranged fairly regularly, not 
heaped. There are two spines above the oral aperture, and the ovicells are 
large, wide, raised, with but a rather small area perforated by irregular 
pores, which are often large. In the Red Sea specimens the large duck-hill 
avicularia are not common, and are much smaller than those in the specimens 
from Manaar. ‘These avicularia are the more highly-developed equivalent 
of the small blunt avicularia, and in these large avicularia the round sub- 
