234 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
Dongola having them from each terminal zocecium has been thought worthy 
of a figure (Pl. 24. fig. 3). 
In the Sudan specimens I have seen a few short tubules to the closures and 
have not seen them in any other Crisia. 
Loc. British, French, and neighbouring seas, Cape Verde Is. (Cross. Coll.), 
Mediterranean, Cape York, Australia ( Chall.), Khor Dongola (19*) ; Engineer 
Island, Khor Dongola, collected by Crossland ; Ras el Millan, collected by 
Hartmeyer. 
CRIsIA PRODUCTA, Smitt. 
Crisia producta, Switt, Ofv. K. Vet. Férhandl. p. 116, pl. 16. figs. 4-6 (1865). 
See Miss Jelly’s Catalogue under C. eburnea, var. producta, and add :—Crisea eburnea, var. 
producta, Levinsen, “ Mosdyr,” Zool. Danica, vol. iv. (1894) p. 74, pl. 6. fig. 40. 
There are a few small specimens which fairly agree in size of the zocecial 
aperture (0°06 mm.) with C. cornuta and C. geniculata, and I certainly see no 
reason for placing it near C. eburnea, in which the growth of the new zocecium 
forming a fresh branch is very different. The growth of the Mediterranean 
C. fistulosa, Heller, is similar, but the zocecia in that species are much stouter, 
with wider apertures (0'1-0°11 mm.), the joints are larger and the internodes 
are longer, so that they are easily distinguishable. However, we may imagine, 
from C. geniculata, placed under favourable circumstances, the form producta 
arising and then growing into the stouter C. fistulosa. C. geniculata occurs 
near Naples. 
Loe. Arctic, British, Danish, Naples, Suez, Sudan (18%), collected by 
Crossland. 
Crista RAMOSA, Harmer. 
Crista ramosa, Harmer, ‘ Brit. Spec. of Crista,” Micr, Journ. vol. xxxi. n. s. p. 184, pl. 12. 
fies. 10, 11. 
There are from the Sudan a few small pieces, which appear much more 
delicate than most parts of C. ramosa, the zoarium being only akout 0-1 mm. 
wide, but on comparing with one of the lower branches of a good specimen of 
ramosa I found the similarity very close. Although the ovicell of the Sudan 
specimen is a trifle the smaller the shape is the same, and although the 
oceciostome is somewhat broken there evidently was a funnel. The distance 
from aperture to aperture is about 0-4 mm. and the zocecial aperture is about 
0:06 mm. The branches arise, as in the British specimens, usually after the first 
zocecium on the one side. In specimens from Naples corresponding in the 
size of the zocecia and the distance apart, the zocecia usually arise after the 
second zocecia, though I have seen some after the first ; the ovicells and the 
funnel are quite similar to the British form, as is also the frequency of 
* These and similar numbers are Crossland’s registration numbers. 
