43 
Annelids of Alaska—HARTMAN 
sheathing collar and the crenulate cephalic 
plaque. 
This species has remained unknown except 
through the single record from deep water off 
southern California; the present record is off 
Hallo Bay, in 28 to 40 fm. 
Family SABELLARIIDAE 
Genus Idanthyrsus Kinberg 
Idanthyrsus ornamentatus Chamberlin 
? Sabellaria saxicava Baird, 1863: 109. 
Idanthyrsus ornamentatus Chamberlin, 1919: 
262-263, pi. 3, fig. 2-5; Hartman, 1944: 
337, pi. 31, fig. 34. 
Pallasia johnstoni Berkeley, 1930: 74-75. 
Collections. Stations 13-40 (10); 126-40 
(3); 131-40 (1); 139-40 (1); D 11-41 (1). 
The tubes are firmly concreted and broadly 
attached to the substratum. They tend to be 
sinuous or slightly coiled. They are attached to 
pelecypod shells, living or broken fragments, 
also the carapace of decapods and other hard 
objects. 
1. ornamentatus is distinguished from nearly 
related species, I. armatus Kinberg and I. pen- 
natus (Peters), most conspicuously in the shape 
of the outer opercular spines (Hartman, 1944). 
Sabellaria saxicava Baird is incompletely known 
but originates from Vancouver Island, hence is 
questionably referred to this species. Berkeley 
(1930: 74) considered I. ornamentatus and 
Sabellaria saxicava probably synonymous, a con¬ 
clusion which I consider also likely, but she 
referred them to Pallasia johnstoni (McIntosh) 
which has been referred to I. pennatus (Peters) 
(see Johansson, 1927: 88-90). The last named 
is a nearly related species, but distinguishable 
in the structure of the outer opercular spines. 
Previous records are from northern California 
to southern Alaska. The present records are 
from Canoe Bay, in 30 fm., north side of Sheli- 
kof, in 65-80 fm., off Cape Chiniak, in 32-35 
fm., off Hallo Bay, in 28-40 fm., and Walrus 
Island, Bering Sea, in 31-33 fm. 
Family AMPHARETIDAE 
Genus Amphicteis Grube 
Amphicteis alaskensis Moore 
Amphicteis alaskensis Moore, 1905c: 846-849, 
pi. 44, fig. 1-4. 
Collection. Station 59-40 (1). 
The single individual measures 32 mm. long. 
The original collection comes from Kadiak Bay, 
and southeast Alaska, in 41 to 48 fm. The 
present record is from between Inner Iliasik 
and Goloi Island, in 20 to 30 fm. 
Genus Ampharete Malmgren 
Ampharete grubei Malmgren 
Ampharete grubei Malmgren, 1866: 363, pi. 19, 
fig. 44; Moore, 1923: 201; Fauvel, 1927: 
227-228, fig. 79; Berkeley, 1942: 201. 
Collection. Station D 3-41 (1). 
This species has been recorded from both 
sides of northern North America and the north 
Atlantic Ocean (see synonymy above). The 
present record is from Castle Bay, off Chignik 
Bay, in 21 to 52 fm. 
Family TEREBELLIDAE 
Genus Amphitrite Muller 
Amphitrite cirrata Muller 
Amphitrite cirrataMsillts, 1776: 188; Chamber- 
lin, 1920: 22B; Berkeley, 1942: 202. 
Amphitrite palmata Moore, 1905c: 858-859, 
pi. 44, fig. 19-22. 
Amphitrite radiata Moore, 1908: 350. 
Collections. Stations 60-40 (2); C 5—41 
(1); D 7-41 (1); D 11-41 (2); head of 
Lazy Bay (2). 
Individuals attain a length of about 150 mm. 
There are 17 thoracic setigerous segments. Each 
of the three branchial segments has a pair of 
lateral lappets. Thoracic notopodia are provided 
largely with smooth capillary setae, but the 
