S4 THÉEEL, NORTHERN AND ARCTIC INVERTEBRATES. I. SIPUNCULIDS. 
In conformity with my former views I prefer here too to keep the forms sepa- 
rate for the present, retaining the name "Sarsi” for the shorter form, and giving to 
the longer one the name "”anceps"”. 
As to the general shape of the body, the type at my disposal closely resembles 
that of Ph. Sabellarie. Length of the trunk, reckoning from the anus, 7 mm. and 
that of the proboscis about 3 mm. According to KOoREN and DANIELSSEN the trunk 
has a length of 8 mm. and the proboscis one of 2 mm. Thus, in both cases, the 
total length would be 10 mm., and the proboscis very short. The trunk is almost 
cylindrical, ending posteriorly in a conical point. The transparent skin has the glandular 
bodies protruding inconsiderably beyond the level of its outer surface, thus presenting, 
at the posterior end of the trunk and round the anterior part of the proboscis, 
extremely minute papille. Among these, and behind the tentacular disk, there are 
to be observed small, scattered, slightly curved, acuminate hooks, with narrow base 
(Fig. 59), which were overlooked by KOREN and DANIELSSEN. The tentacular crown 
is highly reduced and may probably bear some resemblance to that of Ph. Sabellarize. 
KOREN and DANIELSSEN say that there exists only one retractor-musele, attached 
by its broad basis to the posterior part of the body-wall, 2 mm. from its extremity 
and on the left side of the nervous cord (Cp. their Fig. 40!). My own investigation 
of the type from Skraaven in Lofoten goes to show that the retractors are two in 
number, and run out, each with a rather broad base, on either side of the nerve- 
cord, and that they are attached slightly more in front than is stated by KOREN 
and DANIELSSEN. But they are webbed together for a good part of their length. 
The intestinal spiral seems to resemble that of Ph. Sabellarie. In spite of the state- 
ments of the Norwegian investigators, which speak of only one segmental organ, there 
exist in reality two. Very significant genital festoons are seen at the bases of the 
retractors, and the body-cavity is filled with ova. 
Phascolosoma anceps n. (?) 
Pl. V. Figs. 60—70, Pl. XIV. Figs. 204— 205. 
Phascolosoma levissimum M. SARS 1868 (no deseription) (partim). 
Onchnesoma Sarsuwi KOREN and DANIELSSEN 1875 and 1877 (partim). 
z Habitat: 
Greenland: Baffin Bay, 72” 4' n.—59” 50' w., 227 fms., gray clay (Ing. & Gl. 
Exp. 1871), I sp. — Omenak, 250 fms., fine elay (Torell), 14 sps. — 74? 52 n.— 
17” 16' w., 350 m., clay, sand and small stones (Gr. Exp. '/; 1899), 5 sps. — Franz- 
Josef Fjord, 73” 15 n.—25” 42 w., 760 m., mud, sand and stones (Gr. Exp. "/s 
1899), 1 sp. 
Spitzbergen and the Arctic Sea, between Scandinavia and Spitzbergen: 76” 36' 
n.—12” 10' e., 50 m. W. of Horn Sound, 1750 m., clay, bottom-temp.—1,3” (Sp. 
Exp. '/s 1898), up to a hundred sps. — King Charles's Island, the Bremer-Sound 
