KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 39. N:o |. 173 
Bay, clay, 15—5 fms. (Sib. Exp. ”"—""/, 1876) a small dark sp. — Kara Sea near 
Cape Golovin, sandy clay (Yen. Exp. "/s 1875), 1 dark sp. 
Peninsula of Kola: Ora Fjord (Sand. Exp. ”/« 1877), 1 dark sp. — Waydeguba 
(Sand. Exp. "7, 1877), 1 small dark sp. — Semi-Ostrowa, 60—63 fms. (Sand. Exp. 
1877), about 15 brown sps. — Bumanmni Fjord, sand and clay (Sand. Exp. 1877), 3 
sps. — Ladigino, rocks and alges, 7—8 fms. (Sand. Exp. '/s 1877), 2 light sps. — 
Finmarken: Qualsund, clay, 90 fms. (Gois & MALMGREN), 6 light sps. — Karlsö, 
30—40 fms. (Sp. Exp. "/. 1864), 3 light sps. — Grötsund, clay, 60 fms. (Gois & 
MALMGREN), 6 light sps. — Tromsö (Mus. Chr. & Mus, T.). 
Distribution in General: 
Arctic Sea: 75 31 n.—17” 50' e., dark clay, 225 m. — 74? 8 n.—31” 12" e., 
greenish clay, 269 m. — 70” 4 n.—23” 2' e., greenish clay, 293 m. (DANIELSSEN and 
KOoREN 1881) — Tromsö and Hammerfest (M. SArRs 1851, KOoREN and DANIELSSEN 
1875, 1877). — The southernmost locality on Scandinavian coast is Bodö, north of 
the Polar Circle (KOREN and DANIELSSEN 1875, 1877) — Greenland (KEFERSTEIN 
1865). — 
North America: Casco Bay — Cashe's Ledge — St. George's Bank — Gulf of St. 
Lawrence (VERRILL 1874 and WHrirBEAVES"' 1901). The species must be looked upon 
as a true arctic form, but it has not a cireumpolar distribution. Its centre seems 
to be in the arctic part of the North Atlantic Sea. 
ÅA repeated investigation of the fragmentary original specimen of Phascolosoma 
digitatum makes it seem probable, that it is nothing but a younger, fully extended, 
transparent and light form of the species in question. At least, I am now tempted 
to believe this view to be the right one. 
With regard to the colour we have to notice two varieties, one more or less 
darkish brown, and one light brown. The former seems to prefer the Kara Sea and 
the waters round Nova Zembla and Spitzbergen; the latter is mostly found in the 
sea off Finmarken and Greenland. 
This very well distinguished species as a rule has its skin finely wrinkled trans- 
versely, when it is in a good state of preservation. In the light variety the papille 
often appear as minute dark points when they are examined under a good magni- 
fying glass. The fully extended papille communicate to the surface of the skin a 
sparingly villous aspect. 
The annexed table exhibits the degree of variation to which the tentacles of 
this species are subjected. 
1 Catalogue of the Marine Invertebrata of Eastern Canada, Ottawa, 1901, 
