New Pogonophora from the Eastern Pacific Ocean 
Olga Hartman 1 
Continuing surveys, since 1955, of faunas in 
offshore areas of southern California, conducted 
by the Allan Hancock Foundation, using the 
facilities of the M/V "Velero IV,” have resulted 
in finds of several representatives of pogonopho- 
rans. One, belonging to the genus Siboglinum 
Caullery, is believed to represent an undescribed 
species. Other kinds, from different places, are 
briefly reported below, to indicate the wide 
range of occurrences in deep ocean bottoms off 
southern California. All come from depths ex- 
ceeding 950 m. and in latitudes south of 33° N. 
The much larger and far better explored shal- 
lower depths have yielded none, despite the ex- 
amination of thousands of grab samples from 
shelf, slope, basin, and canyon depths of the shelf 
lands between Point Conception, California, to 
south of the Mexican border. 
All specimens are deposited in the collections 
of the Allan Hancock Foundation. I am indebted 
to the Administration of the Foundation for per- 
mission and time to study these interesting ma- 
terials. The cost of collecting the materials was 
defrayed by funds from the National Science 
Foundation and the Allan Hancock Foundation. 
Captain G. Allan Hancock has generously pro- 
vided for any deficiencies in the running costs 
of the ship. The scientific and operating crews 
of the "Velero IV” took and processed the col- 
lections. Dr. Gosta Jiigersten, Uppsala, Sweden, 
examined specimens and verified their generic 
affinities. The illustrations were prepared by 
Anker Petersen. I am indebted to all of these 
people for their help and interest. 
GENUS Siboglinum Caullery, 1914 
TYPE S. weberi Caullery, 1944 
Siboglinum veleronis, new species 
Figs. 1-9 
COLLECTION: More than 100 specimens were 
taken by the "Velero IV,” sta. 7049, May 7, I960, 
1 Allan Hancock Foundation, University of Southern 
California, Los Angeles, California. Manuscript re- 
ceived January 27, 1961. 
14.85 mi. 264° true from Point La Jolla, 32° 
49' 37" N., 117° 35' 12" W., in 97 6 m, from 
the axis of La Jolla canyon near its convergence 
with the San Diego trench. The Campbell grab, 
weighing about 900 lb. with a capacity of about 
5 cu. ft., recovered 2.51 cu. ft. of gray sand and 
green mud. In addition to the Siboglinum speci- 
mens, the sample yielded the kinds and numbers 
of animals listed below. 
DIAGNOSIS: Individual tubes measure 50-65 
mm. long by 0.13 mm. across. Others are longer 
or narrower, having a length-to-width ratio of 
450-720 to 1. Each tube is usually slender, cylin- 
drical, pale to dark straw-colored, and crossed 
by alternating dark brown and pale bands. The 
brown ones are typically paired ( Fig. 2 ) , so that 
both of a pair are nearly twice as long as one 
pale band. An occasional irregularity in this pat- 
tern results when the two dark ones are so close 
together as to appear fused, or are incomplete 
on one side to form a broader than usual, in- 
complete, pale band. The greater length of the 
tube is crossed by these alternating cross bars; 
only the distal anterior and posterior ends ( Fig. 
1) are pale and usually collapsed. The animal 
within lies usually some distance within the 
banded region; none has been found partly or 
wholly out of the tube. With the aid of a stereo- 
scopic microscope the specimen can be seen 
through the wall of the tube and oriented with 
respect to the anterior and posterior regions, the 
tentacle in front directed forward, and the an- 
nular or uncinial band marking the approximate 
middle region of the body. However, dissection 
is necessary to study the animal more completely. 
Slitting the tube lengthwise has been found least 
destructive to the soft-bodied specimen; by us- 
ing a razor-sharp, finely pointed knife and in- 
serting it into the distal end of the tube, then 
extending the cut lengthwise for the length of 
the contained individual, one can then lift it 
out intact from the shell of the tube. 
An entire animal measures 15 mm. long to 
the annular, or uncinial, region which is near 
the middle, making the total length about 30 
542 
