474 Mr. A. W. Waters on 
internodes, and was able to determine C. eburnea, L., C. fistu- 
losa, Hell., and C. stgmoidea, Waters. 
Dr. Harmer kindly allowed me to examine some ‘ Siboga’- 
slides of what he considers C. elongata, and among them was 
37U, which he has queried in his report. This, however, 
has very long straight internodes, with the branches narrower 
than in other specimens of his C. elongata ; the branches are 
given off pretty high in the internode after the third or fourth 
zocecium of that side ; ; the base of the internode is about 
0:07-0:08 mm., with the basis rami long, reaching to the next 
zocecium ; the zocecia project at the end but very slightly, 
and the joints are light. ‘The straight internodes, the basis 
rami long instead of being wedged i in, and the light joints 
indicate that it belongs to thé eburneo-denticulata group, and 
not to the dlenisaulies group, of which C. elongata, Harmer, is 
a member. It is much like the present C. oranensis, though 
rather narrower. 
On the other queried slide, 37 R, there is, among others, a 
specimen similar to the present in having a long basis rami, 
Jong narrow internodes, but the joints are black, and other 
wise in the shape of the branches, form of the basis rami, 
the distance between the zocecia, end the ovicell there is a. 
resemblance to C. ramosa, Harm. Harmer suggests in his 
report that this may be the C. denticulata, var. gracilis, 
Busk, and this, I believe, is the case, though with the long 
basis rami not wedged i in and the small pyriform ovicell it 
would hardly seem to belong to the denticulata group, and 
should stand as C. gracilis, Busk. 
Loc. Oran (Algiers). 
Crisia eburneo-denticulata, Busk. 
(Pl. XVI. figs. 4 & 5.) 
Crisia eburnea, var., Smitt, Kr. Fort. of Skand. Hafs Bry. 1865, pl. xvi. 
figs. 9, 10, 11. 
Crisia ebur neo-denticulata, Busk, Cat. Mar. Poly. in the Brit. Mus., 
Cyclost. p. 5, pl. vi. (1875) ; Vigelius, Cat. of Polyzoa d. Cruise of the 
‘ Willem Barents,’ Niederl, Arch. f. Zool. p. 4(1882); Ortmann, Die 
Japanische Bry., Arch. fiir Naturgesch. vol. i. p. 58, pl. iv. fig. 18 
(1890) ; Calvet, Bry. Mar. de Cette, p. 72 (1902) ; Waters, Bry. from 
Franz Josef Land, Cycl., Journ. Linn. Soc., Zool. vol. xxix. p. 165 
(1904). 
Zoarium with straight internodes, no intermediate space ; 
branches one, two, three, or four ; few pero (about 
five to the agUATE 0-1 mm. vs basis rami fairly long; base of 
internode 0°12 mm. ‘The ends of the zocecia project but very 
slightly in all the specimens examined, whereas Smitt, in 
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