BRYOZOA FROM FRANZ-JOSEF LAND. 55 
vibracula; but when a radicle occurs, and they are not frequent, 
there is usually a vibracular chamber nearly at right angles to 
the axis of the zoarium. The seta is broad at the base and is 
symmetrical. There are 16 tentacles. 
In my paper on the Cellulariide, I have shown that S. scabra 
is a northern form and §. Delilii, Aud., Mediterranean and 
from Madeira; and I have been unable to accept some of the 
synonyms given by Mr. Hincks and Miss Jelly, and there have 
also been some mistakes in giving the range of localities. 
Loc. Spitzbergen, 6-150 fath.; Greenland, Finland, Novaya 
Zemlya, Kara Sea, Jan Mayen, Murman Sea; Franz-Josef Land, 
lat. 77° 55’ N., long. 51° O' HE. (Ridley); Kola, Iceland, St. Law- 
rence (Hincks); Norway, North Sea, British seas, Davis Straits. 
Jackson-Harmsworth Exp.: nr. Wilczek Land, 127 fath.; 
off Cape Mary Harmsworth, 53-93 fath.; off Cape Gertrude 
30 fath. 
> 
8. SCRUPOCELLARIA TERNATA, var. GRACILIS (Smitt). (Pl. 7. 
fig. 12.) 
Cellularia ternata, var. gracilis, Smitt,“ Krit, Fort.” 1867, pp. 283 & 805, 
pl. xvi. figs. 14-24. 
Cellarina ternata, var. gracilis, Verrill, Cont. Zool. Mus. Yale College, 
no. 43 (fide Jelly). 
Menipea gracilis, Levinsen, Bryoz, Kara-Havet, p. 307 (8); Busk, 
Journ. Linn. Soe. vol. xv. p. 282. 
Menipea arctica, Busk, Quart. Journ. Micr. Se. vol. iii. p. 254, pl. i. 
figs. 4, 5, 6; Ridley, Ann. Mag. Nat. Hist. ser. 5, vol. vii. p. 444; Lorenz, 
Bry. von Jan Mayen, p. 83. 
Menipea ternata, Hincks, Ann. Mag. Nat. Hist. ser. 5, vol. x. p. 3; 
Bidenkap, Bry. von Ost-Spitzbergen, p. 613. 
There has been considerable doubt as to the position of this 
form, for some authors, as Bidenkap, think, after the result of 
the examination of considerable material, that there should be no 
separation between S. ¢ernata and 8. ternata var. gracilis ; others, 
as Levinsen and Busk, would make two species. Lorenz gave a 
table showing how his S. arctica varied with respect to spines, 
avicularia, and scutum. 
The specimens from Franz-Josef Land are subject to very 
great variation: sometimes on the same colony the zocecia may 
be with or without a scutum, and this may be very minute or 
full-sized ; the spines may be absent, or there may be one, two, or 
three. The median cell may be mucronate or plain, but often 
