Papers from Dr. Th. Mortensen’s Pacific Expeciitioo 
1914 — 16 . 
XVI. 
Ceriantharia. 
By 
Oskar Carigren, Lund. 
(With 16 figures in the text.) 
The present paper is based on the material collected by Dr. Th. 
Mortensen on his Pacific Expedition 1914—16 and on the Danish 
Expedition to the Kei Islands in 1922, together with that collected 
by Captain E. Suensson in the Korea Strait in 1882. With the 
kind permission of Dr. Mortensen I have also inciuded the mater- 
lal of Cerianthids collected by Dr. Sixten Bock on his Expedi- 
tions to the Pacific in 1914 and 1916-17. I beg to express here 
my thanks to Dr. M o rte nse n for thus gi ving me the opportunity 
of treating all this material in this paper, instead of making two 
or more separate publications of it, which would, from a scientific 
point of view, have been less satisfactory. 
Cerianthus Jiliformis n. sp. 
Di agnosis: A large species. Marginal tentacles about 70, 
airanged 2 (dt^) 431 | 4231 | 4231 | .... Arrangement of the labial 
tentacles 3 (dt) 423 | 4132 | 4312 | .... Longitudinal muscles of 
the column very strong, 2 (4) mesenteries attached to the narrow 
siphonoglyph. Hyposulcus very short with distinet hemisulci, both 
with exocoelar ciliated tract. Directive mesenteries >) short, p^ >) 
reaching alm ost to the aboral end but shorter than the oldest M *) 
') df. directive tentacles, dm: directive mesenteries, p,, p,: protomesen- 
enes and 3. M, m, 5 and b: metamesenteries of the first, second, 
ir and fourth cycles. Mi, nu, Bi, bi: metamesenteries of the first 
