KUNGL, SV. VET. AKADEMIENS HANDLINGAR. BAND 39. N:o |. 79 
and the posterior extremity amounts to 27 mm., while that of the proboscis, reckoning 
from the anus, is only 11 mm. (Fig. 71). The cylinder-shaped trunk is smooth and 
semi-transparent, and its posterior end is obtusely rounded. The skin is fairly firm, 
and when examined under a low magnifyimg-power it shows — especially at its 
posterior extremity and at the base of the proboscis — a number of pores, which 
indicate the presence of glandular bodies (Figs. 76—81). No true papille are to be 
seen. Towards the tentacular crown the proboscis becomes inflated and provided 
with about 14 rings of large, strong, sligthly curved, compressed and brownish hooks 
(Figs. 72—75). The posterior rings are more irregular and formed by considerably 
smaller hooks. Between the hook-rings and the tentacular crown there is a narrow, 
smooth girdle. The tentacles (Fig. 206) are short and thick, and their number amounts 
to 20 or slightly more. The two retraetors run separately in the main, and their 
strong roots are attached slightly in front of the middle of the body on each side of 
the nervous cord. Their bases carry the generative festoons in the usual manner. 
Two free segomental organs are present. The intestimal spiral is not attached to the 
posterior extremity of the body. 
Phascolosoma Lilljeborgii DANIELSSEN and KOREN 1881. 
Habitat: 
North Atlantic, W. of Norways; 64” 2 n.—5” 35' e., 911 m., elay. (Mus. B.), 2 sps. 
N ) ] 
Distribution in General: 
North Atlantic and Aretic Seas: 63” 5 n.—0” 52 e., 1073 m., ooze. — 63” 22' n. 
—5” 29 w., 2222 m., sabulous elay. — 65” 53 n.—7” 18' w., 2127 m., Biloculina-clay. 
— 69" 18 n.—14? 32 e., 980 m., clay. — 70? 55' n.—26” 11' e., 232 m., clay. — 
71” 59 n.—11” 40' e., 2030 m., Biloculina-elay. A few specimens from each station 
(KOREN and DANIELSSEN 1881). — Spitzbergen (Fischer '"). 
Dr APPELIÖF of Bergen has kindly placed at my disposal two specimens brought 
home by the Norwegian North-Atlantie Expeditions of 1876—1879. The largest in- 
dividual measures 37 mm. in length from anus to the posterior extremity of the trunk, 
and the retracted proboscis must be equally long. According to DANIELSSEN and 
KOREN their largest specimen had a total length of 80 mm., of which 40 mm. falls 
to the share of the proboscis. 
The skin is hyaline and quite smooth. The proboscis is devoid of hooks, and 
according to the Norwegian investigators bears, "at its extremity a cincture of short 
and rather broad tentacula'. Under the "Specific Character” they state their number 
to be 8 to 10. For my part, I am unable to verify their statement. The material 
at my disposal has been too scanty. 
With regard to the retractors the writers named say: "There is only one retractor, 
which takes it origin immediately posterior to the medial point of the trunk, with 
1 Abhandl. aus dem Gebiete der Naturwissenschaften. Hamburg 1895. p. 14, 
