New Pogonophora — Hartman 
545 
a square meter. The animals contained in the 
mud, without tubes, weighed about 6.4 g. (moist 
weight). They included the following: 
Siliceous sponge spicules, scattered through 
the debris 
Anemone, small white, 1 
Crustaceans (not identified) 
ostracod, 1; amphipod, 1; cumacean, 2; 
gnathid isopod, 2 
Mollusks: more than 100 living small gastro- 
pods, pelecypods, and 3 small solenogasters 
(not identified) 
Echinoderms, identified by Fred Ziesenhenne 
Ophiacantha normani Lyman, 2 
Ophiura kojoidi J. F. McClendon, 22 
Polychaetes: with 22 species and more than 
200 specimens 
Ancistrosyllis tentaculata Treadwell, 3 
Axiothella sp., 6 
Aricidea aciculata Hartman, 3 
A. uschakowi Zachs, 32 
ampharetid, juveniles, 4 
Brada glabra Hartman, 12 
Chaetozone ? gracilis (Moore), 2 
Chaetozone sp., fragments, 2 
Cos sura Candida Hartman, juveniles, 2 
Glycera Pcapitata Oersted, juveniles, 2 
Haploscoloplos elongatus (Johnson), 4 
Heteromastus Pflobranchus Berkeley, 4 
Maldane cristata Treadwell, 13 (the largest 
and most conspicuous in the sample, con- 
tained in thick, mudwalled tubes with 
lateral vents and branches) 
Myriochele ? gracilis Hartman, juvenile, 1 
Ninoe fusca Moore, 12 
Nothria sp., juvenile, 1 
Paraonis gracilis oculata Hartman, 77 + 
Pilar gis hamata Hartman, 1 
sabellid tube, 1 
Tereb ellides sp., juvenile, 1 
Tharyx monilaris Hartman, 10 + 
T. tesselata Hartman, 4 
Pogonophora 
Siboglinum veleronis, new species, 100 + 
The total number of species and specimens is 
thus 30+ and 428 + . 
SYSTEMATIC AFFINITIES: S. veleronis, the 
eleventh species to be described in the genus 
Siboglinum, differs from others in that the tube 
has double bands of dark brown bars, and the 
uncini of the annular region have 9-13 teeth 
in a single transverse row. The proportional 
lengths of the first and second body regions, 
shown in Figures 5 and 6, differ from those of 
other species. 
It is noteworthy that all but two of the known 
species occur in far northern latitudes. Six come 
from the northwestern end of the Pacific Ocean; 
three others are from the northeastern part of 
the Atlantic. The first species of the genus, S. 
iveberi Caullery, came from the Malay trench in 
great depths, and the present species is the first 
to be described from the western hemisphere. 
These species, with their distributions are as 
follows : 
S. tueberi Caullery, 1944, IndoPacific area, in 
462-2060 m., in fine sand and mud. 
S. ekmani Jagersten, 1956, Skagerack, north- 
western Europe, in 487-650 m., clay. 
5'. caulleryi Ivanov, 1957, Ochotsk Sea, in 90- 
200 m., and other northwestern Pacific areas in 
depths of 23-8100 m., in the Kurile trench. 
S. cinctulum Ivanov, 1957, northwest Pacific, 
in 3420 m., in the Kurile trench. 
S. pellucidum Ivanov, 1957, southwestern part 
of the Bering Sea in 1740-4820 m. 
S. minutum Ivanov, 1957, Bering Sea in 
3740-3840 m., and Kurile-Kamchatka trench in 
5540 m. 
S. fedotovi Ivanov, 1957, southwestern part of 
the Bering Sea in 3330-3940 m. 
S. plumosum Ivanov, 1957, Ochotsk Sea east 
of Japan, in 124-318 m. 
FIGS. 1-9: Siboglinum veleronis, new species, from "Velero IV” sta. 7049- 1, Entire tube con- 
taining animal, X 22; 2, part of tube showing paired dark alternating with pale bands, X 89; 
3, part of tentacle from near base, showing pinnules curled toward midventrum, X 228; 4, another 
part of tentacle from another individual, with pinnules nearer tip of tentacle, X 228; 5, animal with 
tube partly dissected away, tentacle directed forward, in left lateral view, X 25.5; 6, enlarged anterior 
regions including protosoma, mesosoma with frenulum and pore of coelomoduct, and part of glandu- 
lar metasoma, in left lateral view, X 83; 7, an uncinus from annular zone, seen from denticled side, 
X 5,720; 8, an uncinus seen from opposite side, X 5,720; 9, an uncinus seen from top, showing 
arcuate arrangement of denticles, X 5,720. 
