30 
PACIFIC SCIENCE, Vol. II, January, 1948 
Collection. Station 70-40 (4). 
The articulation and proportion of palpi and 
antennae agree well with those in the original 
description. The species is known only through 
the original account from British Columbia 
(Berkeley, 1927 a ); the present individuals are 
from Cold Bay, in 15 to 35 fm. 
Family ORBINIIDAE 
Genus Haploscoloplos Monro 
Key to Species of Haploscoloplos 
1. Subpodal lobe (Fig. 8 b) present. 
. H. alaskensis 
1. Subpodal lobe absent. 2 
2. Thorax consists of 20 segments; branch¬ 
iae present from sixteenth segment; 
thoracic postsetal lobe short, papiilar 
. H. elongata 
2. Thorax consists of 14 segments; branch¬ 
iae present from eleventh segment; 
thoracic postsetal lobe long (Fig. 8 e) 
. H. sp. 
Haploscoloplos elongata (Johnson) 
Scoloplos elongata Johnson, 1901: 412-413, 
pi. 10, fig. 105-110; Berkeley, 1927^: 413. 
Haploscoloplos elongata Hartman, 1944£: 257. 
Collection. 59-40 (3). 
Thoracic neuropodia are provided with only 
pointed setae; acicular spines and subuluncini 
are absent; this is therefore referred to Haplo¬ 
scoloplos. Specific characters include the fol¬ 
lowing. The prostomium is pointed, triangular. 
Branchiae are first present from the sixteenth 
setigerous segment; they are small through three 
to five segments, but broad and laterally fim¬ 
briated farther back. The thorax consists of 
20 setigerous segments in which the last one is 
transitional. Thoracic notopodia and neuropo¬ 
dia have a short, simple, postsetal lobe at the 
mid-length of their ridges; at first they resemble 
papillae but by the transitional segment they are 
larger and triangular. 
Subpodal lobes, ventral cirri, and intercirri 
are absent. Setae are long, pointed, and spinous 
along their free length; those in thorax and 
abdomen, in notopodia and neuropodia, re¬ 
semble one another except for their relative 
thicknesses and lengths. In addition, three to 
five furcate setae occur in abdominal notopodia, 
accompanying the pointed ones. 
The dorsum, between the bases of the larger 
branchiae, is marked with a reticulated pigment 
pattern that persists in alcohol. The branchial 
tips and the broad neuropodial flanges have a 
punctate dark pigment. It is this pigmented 
feature, together with the similarity of the pro¬ 
boscis, that first prompted the identity of these 
individuals with Johnsons description of the 
species. In other respects there is likewise agree¬ 
ment, but the original description is lacking in 
important details. 
Scoloplos acmeceps Chamberlin (1919: 15), 
from California, is another species since it has 
acicular spines in thoracic neuropodia; it is a 
true Scoloplos Blainville. 
H. elongata was originally recorded from 
Puget Sound, Washington; the present in¬ 
dividuals come from between Inner Iliasik and 
Goloi Island, in 20 to 30 fm. 
Haploscoloplos alaskensis new species 
Fig. 8 a-c. 
Collections. Stations 35-40 (1); 60-40 (1); 
Lazy Bay (6). 
One individual, posteriorly incomplete, meas¬ 
ures 30 mm. long for 146 segments. No color 
remains (preserved). The prostomium is an¬ 
teriorly pointed, equitriangular and conical, or 
only slightly depressed; there are no visible 
eyespots. The first segment is achaetous and 
apodous. The thorax includes the first 16 setig¬ 
erous segments; dense fascicles of pointed setae 
occur in both notopodia and neuropodia. The 
seventeenth segment marks the beginning of 
the abdominal region; neuropodial lobes are 
longer and slenderer than those in front, and 
the setae are disposed in prolonged slender tufts. 
