838 MR. A. W. WATERS ON 
CrisiA ELONGATA Milne-Edwards. (Pl. I. figs. 3, 4; Pl. IV. 
fig. 6.) 
Orisia elongata Milne-Edwards, ‘“ Mém. sur les Crisies, les 
Hornéres,” Ann. des Sciences Nat. ser. 2, vol. ix. p. 10, pl. vu. 
fig. 2 (1838); ? Busk, Brit. Mus. Cat. Cyclost. p. 5, pl. iv. figs. 5, 
6 (1875); ¢Busk, Chall. Exp. Zool. vol. xvii. p. 5, pl. i. fig. 3 
(1886). 
The specimens from Wasin are without any doubt the species 
described by Milne-Edwards, even though he says * plus gréle” 
than C., denticulata Lamk., which is not the case. Busk, in his 
Museum Catalogue, speaks of the zocecia being much produced, 
whereas this is never the case in my specimens, nor does Milne- 
Edwards show it, or even Busk himself in his figures. 
The lateral branch, of which there is one, and only one, to each 
joint starts from near the end of a joint, after about the 6th-10th 
zocecia on the one side. The last zocwcial tube is continued free, 
as is the case to a certain extent with the last zocecium on the 
other side. The number of zoccia is uneven, and in some of the 
terminal nodes as many as 13 pairs of zocecia have been counted. 
There is the small mark below the oral aperture, as in C. denti- 
culata, showing its relationship. The older chitinous joints are 
black, the younger ones are light. No ovicells are known. 
The surface has numerous pores, and | do not understand Busk 
speaking of it as granular. The closure is slightly raised in the 
centre, and near this there are one or two pores. 
The zoarium is about 0°3 mm. wide; the distance from zocecium 
to zocecium, on the same side, is about 0°25 mm.,and the aperture 
of the zocecia is about 0°07 mim. 
Since I wrote my Naples paper, I have been able to examine 
better specimens of what I took to be C. elongata, which correspond 
most nearly with C. cribraria Stimpson, as re-described by 
Osburn *. 
In the Naples specimens, the fresh internode arises after the 
2nd, 3rd, or 4th zoccium of the one side, and another branch 
arises from after about the 6th zocecium on the other side; no 
ovicells were found, though some are forming at the very end of 
the branch, and the zowcia are about 0°45 mim. apart, which is 
about the same as in C. ramosa H., with which it is allied, but 
the chitinous joints are light. What I called var. angustata, 
I now consider is C. ramosa Harm. 
The Algoa Bay specimen, so described in the British Museum 
Catalogue, is probably elongata, and in this specimen the fresh 
branches are always high in the internode. The ‘ Challenger’ 
specimen named elongata I do not think is this species, and it 
has branches both high and low in the internodes, more as in 
C. ramosa. The specimens called elongata by Norman from 
Madeira are more like C. rwmosa. 
Loc. Red Sea ? (I.-Hd.); Algoa Bay? Wasin, Brit. E. Africa, 
10 fath. (501), collected by Crossland. 
* “ Bryozoa of the Woods Hole Region,” Bull. Bur. of Visheries, yol. xxx. p. 215, 
pl. xviii. fig. 7 (1910). 
